Предназначение и правила установки ограничителя перенапряжения

Чтобы обеспечить стабильную и безаварийную работу электрического промоборудования и бытовой техники, необходимо, чтобы поступающая электроэнергия соответствовала определенным параметрам. Сегодня мы рассмотрим, что такое ОПН и как подключить ограничитель перенапряжения – приспособление, которое предотвращает многие проблемы, связанные с перепадами  напряжения в электрической сети, вызванные различными факторами.

Предназначение ограничителя перенапряжения

ОПН – приспособление, предназначенное для защиты электроустановок и техники от резкого превышения напряжения в сети, которое возникает вследствие грозовых разрядов или коммутационных явлений в электроустановке. Такие импульсы могут стать причиной возникновения аварийных ситуаций, выхода из строя электротехники, пожара. Последствия таких ситуаций обходятся достаточно дорого.

Сейчас вместо утративших актуальность старых моделей разрядников используются ОПН. Приспособление состоит из полимерной или фарфоровой емкости, в которую помещены варисторы. Когда показатели напряжения в электросети соответствуют нормальным параметрам, устройство находится в непроводящем состоянии.

При возникновении опасных импульсов, которые могут повредить защитную оболочку и вывести из строя технику, в цепи резисторов устройства возникает высокий импульс электротока, который уменьшает перенапряжение до показателей безопасных для работы электротехники. После этого приспособление обратно переходит в непроводящий режим.

Ограничители перенапряжения: виды и описание

Приспособления классифицируются по следующим критериям:

• по виду изоляционного корпуса – полимерные и фарфоровые;
• по особенностям конструкции – на одну или несколько колонок;
• по показателю рабочего напряжения;
• по месту монтажа устройства.

Также ограничители делятся на несколько классов:

• А – защищают ЛЭП и ближайшие строения в случае удара молнии;
• В – монтируют на вводе в постройку;
• С – устанавливают в распределительном электрощите здания или квартиры;
• D – ставят на отдельное электрооборудование.

Как установить ограничитель перенапряжения?

Все работы, связанные с монтажом оборудования, должны выполняться опытным электриком, имеющим соответствующий допуск. При этом должны строго соблюдаться правила техники безопасности, а работы – проводиться в соответствии с инструкцией. Рассмотрим, как подключить ограничитель импульсных перенапряжений на примере модели ОПН/TEL-35.

Правила и особенности установки

Данный тип устройств используется для обеспечения защиты электроустановок на подстанциях, а также в электросетях со средним и высоким показателем напряжения. Такие ограничители зарекомендовали себя как надежные, безопасные и не требующие специального обслуживания.

Модель ОПН/TEL предназначена для вертикального монтажа, ее установка производится следующим образом:

• приспособления в специальной таре доставляются к месту проведения работ;
• на металлическую рамку основания устанавливают подставку;
• предварительно проводят визуальный осмотр ограничителей, удаляют загрязнения, коррозионные пятна;
• монтаж ОПН производится вручную с точным соблюдением расстояний, предусмотренных Правилами устройства электроустановок, крепежи затягивают по кругу на половину оборота;
• с помощью специальных шин или электропровода проводят подключение к электросети или другим объектам; чтобы предотвратить развитие коррозионных явлений, следует использовать только алюминиевые проводники;
• необходимо выдержать расстояние до заземленного металлического объекта или других частей электроустановки не менее 90,0 сантиметров.

Профессионально выполненная установка должна исключать воздействие статических нагрузок на ограничитель перенапряжения и обеспечить его продолжительную эксплуатацию.

Варианты подключения

В технической документации, которая прилагается к ОПН, содержится информация о правилах монтажа и возможных вариантах подключения устройства. Чтобы избежать аварийных ситуаций и различных проблем, необходимо строго соблюдать указанные рекомендации и выполнять работы по прилагающейся схеме.

90000 DMVPN — How to Configure Phase 1, 2, and 3 90001 90002 ollowing on from How DMVPN Works, we’re now going to have a look at how DMVPN is configured. 90003 90002 Throughout this article, we’re going to use the topology shown below. 90003 90002 We’re only focusing on DMVPN here. This means that we’re not going to investigate dynamic routing (there will be a future article on this later), or adding IPSec. 90003 90002 Lab files are available for download if you want to see the initial configuration.90003 90010 90002 90003 90002 90003 90002 We’re going to look at the configuration for each DMVPN phase. You may think that phase 1 is outdated, but it’s especially useful for learning DMVPN in general. 90003 90002 90003 90019 90002 It is recommended to read up on GRE and How DMVPN Works before proceeding. 90003 90002 GREAdvanced GREDMVPN 90003 90024 90002 90003 90002 90003 90002 90003 90031 90032 Phase 1 90033 90034 Hub Router 90035 90002 We’ll start by configuring tunnel 0 on the hub router.There are several parts which will be familiar from when you configured a GRE tunnel. 90003 90002 This includes a tunnel IP address, the MTU / MSS (to adjust for the GRE headers), and the tunnel source IP. 90003 90002 The source IP is the 90041 NBMA Address 90042 of the tunnel, and the Tunnel IP is the logical address. 90003 90044 interface Tunnel0 ip address 192.168.254.2 255.255.255.0 ip mtu 1476 ip tcp adjust-mss тисячі чотиреста тридцять шість tunnel source 172.16.2.2 ip nhrp authentication NHRPKEY ip nhrp network-id 1 tunnel mode gre multipoint tunnel key 11 90045 90002 90003 90002 Notice that there is no tunnel destination address? That’s because the destinations are added dynamically, through the NHRP registration process.90003 90002 There are two commands relating to NHRP. First, we (optionally) set authentication. This is a cleartext key that is sent with NHRP packets. 90003 90002 90003 90002 Next, we set the 90041 NHRP Network ID 90042. This is also known as the 90041 NHRP Domain 90042. This is conceptually similar to an OSPF process ID. 90003 90002 It’s possible to have NHRP enabled on more than one interface on a router. Perhaps for another DMVPN network, or some other use. The ID tells the router if the interfaces are in the same domain or not.90003 90002 This value is completely local to the router. It is not sent to any other router, so you can basically set this to whatever you want. It is 90063 recommended 90064 to keep this value the same across all your routers, to make it easier to troubleshoot. 90003 90002 90003 90002 Finally, we can set the tunnel mode to GRE multipoint. This enables more than one spoke router to connect to the tunnel. 90003 90002 90003 90002 The tunnel key is an optional value that we can use for more authentication.The tunnel key, if set, is in the GRE header. It must match for the tunnel to form. 90003 90002 90003 90034 Spoke Routers 90035 90002 The spoke routers use a similar configuration to the hub. The configuration for Spoke-1 is shown below. 90003 90002 Notice that there is a tunnel destination this time? This is the NBMA address of the hub router. 90003 90002 Also, notice that there is no command to set the tunnel type? That’s because, in Phase-1, spokes use regular GRE tunnels, not mGRE.90003 90002 90003 90044 interface Tunnel0 ip address 192.168.254.3 255.255.255.0 ip mtu 1476 ip tcp adjust-mss тисячі чотиреста тридцять шість tunnel source 172.16.3.2 tunnel destination 172.16.2.2 ip nhrp authentication NHRPKEY ip nhrp network-id 1 tunnel key 11 ip nhrp nhs 192.168.254.2 ip nhrp map 192.168.254.2 172.16.2.2 90045 90002 90003 90002 The NHS is the 90041 Next Hop Server 90042. This is the hub router. This needs to be statically configured.Notice that we use the logical tunnel address here. 90003 90002 The spoke will not know where to send encapsulated packets yet, so we need to configure a mapping between the tunnel address and the NBMA address. 90003 90002 90003 90002 The configuration above uses two lines to configure the connection to the NHS; Defining the NHS and mapping the tunnel IP to the NBMA address. Later on we’ll add a third command to configure multicast. 90003 90002 Newer routers support configuring this all on a single line: 90003 90002 90103 ip nhrp nhs 192.168.254.2 nbma 172.16.2.2 multicast 90104 90003 90002 90003 90002 Spoke-2 will be configured in almost the exact same way, so I will not include all the details here. See the lab if you want to see it in action. 90003 90002 90003 90034 Verification 90035 90002 The simplest verification is to ping from one end of the tunnel to the other: 90003 90044 Spoke-1 # ping 192.168.254.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.254.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min / avg / max = 1/1/1 ms 90045 90002 90003 90002 You can also use 90041 show dmvpn 90042 to get more detail.On the hub router, we see the spokes listed as dynamic entries (see the 90041 attrib 90042 column). 90003 90002 You may find that nothing shows up here initially. If not, run a ping to force the spoke to register with the hub. 90003 90044 Hub # show dmvpn Interface: Tunnel0, IPv4 NHRP Details Type: Hub, NHRP Peers: 2, # Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb —— ————— ————— —— ——— — — 1 172.16.3.2 192.168.254.3 UP 00:18:03 D 1 172.16.4.2 192.168.254.4 UP 00:18:02 D 90045 90002 90003 90002 On the spoke side, the tunnel appears as static. 90003 90044 Spoke-1 # show dmvpn Interface: Tunnel0, IPv4 NHRP Details Type: Spoke, NHRP Peers: 1, # Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb —— ————— ————— —— ——— — — 1 172.16.2.2 192.168.254.2 UP 00:18:31 S 90045 90002 90003 90002 Use 90041 show ip nhrp 90042 to get NHRP information.The hub has a timer that will clear out unused entries after a while. Spokes will not have this, as they are static. 90003 90044 Hub # show ip nhrp 192.168.254.3/32 via 192.168.254.3 Tunnel0 created 00:19:01, expire 1:40:58 Type: dynamic, Flags: unique registered nhop NBMA address: 172.16.3.2 192.168.254.4/32 via 192.168.254.4 Tunnel0 created 00:19:00, expire 1:40:59 Type: dynamic, Flags: unique registered nhop NBMA address: 172.16.4.2 90045 90002 90003 90002 And finally, as traceroute shows that spoke-to-spoke traffic works, but it needs to flow through the hub router.90003 90044 Spoke-1 # traceroute 192.168.254.4 numeric Type escape sequence to abort. Tracing the route to 192.168.254.4 VRF info: (vrf in name / id, vrf out name / id) 1 192.168.254.2 5 msec 9 msec 5 msec 2 192.168.254.4 9 msec * 8 msec 90045 90002 90003 90002 90003 90002 90003 90031 90032 Phase 2 90033 90002 The primary difference in Phase-2 is the ability for direct spoke-to-spoke communication. This is enabled by replacing the static GRE tunnel on the spoke with an mGRE tunnel.90003 90002 There are no differences on the hub, so we’re going to skip straight to the spoke routers. 90003 90002 90003 90034 Spoke Configuration 90035 90002 We’re going to use this to build on the configuration in Phase-1, rather than starting from scratch. 90003 90002 90003 90044! Spoke-1 Router interface Tunnel0 no tunnel destination 172.16.2.2 tunnel mode gre multipoint ip nhrp map multicast 172.16.2.2 90045 90002 90003 90002 The first two commands are what Phase-2 is really about.Static GRE is out, and mGRE is in. This is the key. This is how spokes are able to communicate directly. 90003 90002 90003 90002 The only other thing is to add multicast information. Why do we need to do this now? Think about GRE for a moment. GRE headers include two critical pieces of information; The source IP address and the destination IP address. 90003 90002 Multicast addresses can not be used as the destination address in an NBMA network. Multicast will still work, but NHRP will need to get involved.90003 90002 Back when we had a static tunnel on the spoke router, this was easy. Just send multicast packets to the NHS (hub router) and let it manage it from there. 90003 90002 But now we’re using mGRE, which has no static destination. So, the solution is to manually map multicast to the NHS. 90003 90002 90003 90034 Verification 90035 90002 A spoke will now see another spoke as a dynamic DMVPN entry: 90003 90044 Spoke-1 # show dmvpn Interface: Tunnel0, IPv4 NHRP Details Type: Spoke, NHRP Peers: 2, # Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb —— ————— ————— —— ——— — — 1 172.16.2.2 192.168.254.2 UP 00:04:03 S 1 172.16.4.2 192.168.254.4 UP 00:01:25 D 90045 90002 90003 90002 Same is true here: 90003 90044 Spoke-1 # show ip nhrp 192.168.254.2/32 via 192.168.254.2 Tunnel0 created 00:05:11, never expire Type: static, Flags: used NBMA address: 172.16.2.2 192.168.254.4/32 via 192.168.254.4 Tunnel0 created 00:02:31, expire 1:57:27 Type: dynamic, Flags: router used nhop NBMA address: 172.16.4.2 90045 90002 90003 90002 If we run a traceroute, the first pass will go through the hub, just as Phase-1 did. Shortly later the NHRP redirect process will complete, and a second traceroute will show traffic going straight to the remote spoke. 90003 90044 Spoke-1 # traceroute 192.168.254.4 numeric Type escape sequence to abort. Tracing the route to 192.168.254.4 VRF info: (vrf in name / id, vrf out name / id) 1 192.168.254.2 8 msec 9 msec 20 msec 2 192.168.254.4 4 msec * 4 msec Spoke-1 # traceroute 192.168.254.4 numeric Type escape sequence to abort. Tracing the route to 192.168.254.4 VRF info: (vrf in name / id, vrf out name / id) 1 192.168.254.4 5 msec * 6 msec 90045 90002 90003 90002 As before, configured lab files are available for download. 90003 90002 90003 90002 90003 90031 90032 Phase 3 90033 90002 Phase-3 adds the ability to simplify over the DMVPN. There are two parts to this; NHRP redirects on the hub, and shortcut routes on the spokes.90003 90002 90003 90034 Hub Router 90035 90002 The changes to the hub router are really quite simple. One line enables NHRP redirects: 90003 90044 interface Tunnel0 ip nhrp redirect 90045 90002 90003 90002 This enables the hub to inform a spoke of a better path if one exists. 90003 90002 90003 90034 Spoke Configuration 90035 90002 The spokes also have very simple configuration: 90003 90044 interface Tunnel0 ip nhrp shortcut 90045 90002 90003 90002 The shortcut command allows the spoke to accept the redirect message from the hub, and install the shortcut route.90003 90002 90003 90034 Routing Table 90035 90002 To see how this affects the routing table, we’ve added in some static routes. We would normally use dynamic routing, but static is simpler for the example. 90003 90002 To start with, we can see the summary route (10.0.0.0 / 8) pointing to the hub: 90003 90044 Spoke-1 # show ip route Gateway of last resort is 172.16.3.1 to network 0.0.0.0 S * 0.0.0.0/0 [1/0] via 172.16.3.1 10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks S 10.0.0.0 / 8 [1/0] via 192.168.254.2 C 10.222.0.0/24 is directly connected, Loopback0 L 10.222.0.1/32 is directly connected, Loopback0 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.3.0/30 is directly connected, GigabitEthernet0 / 1 L 172.16.3.2/32 is directly connected, GigabitEthernet0 / 1 192.168.254.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.254.0/24 is directly connected, Tunnel0 L 192.168.254.3 / 32 is directly connected, Tunnel0 90045 90002 90003 90002 Next, we’ll generate some traffic between the spokes: 90003 90044 Spoke-1 # ping 10.8.0.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.8.0.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min / avg / max = 6/15/32 ms 90045 90002 90003 90002 Now the interesting part. Let’s look at the route table again: 90003 90044 Spoke-1 # show ip route Gateway of last resort is 172.16.3.1 to network 0.0.0.0 S * 0.0.0.0/0 [1/0] via 172.16.3.1 10.0.0.0/8 is variably subnetted, 4 subnets, 3 masks S 10.0.0.0/8 [1/0] via 192.168.254.2 H 10.8.0.0/24 [250/255] via 192.168.254.4, 00:00:06, Tunnel0 C 10.222.0.0/24 is directly connected, Loopback0 L 10.222.0.1/32 is directly connected, Loopback0 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks C 172.16.3.0/30 is directly connected, GigabitEthernet0 / 1 L 172.16.3.2 / 32 is directly connected, GigabitEthernet0 / 1 192.168.254.0/24 is variably subnetted, 3 subnets, 2 masks C 192.168.254.0/24 is directly connected, Tunnel0 L 192.168.254.3/32 is directly connected, Tunnel0 H 192.168.254.4/32 is directly connected, 00:00:06, Tunnel0 90045 90002 90003 90002 See how there are two entries marked with an 90041 H 90042 code? These are the NHRP shortcut routes. That’s the magic of phase 3! 90003 90002 These entries also show up as shortcuts in the NHRP table.90003 90044 Spoke-1 # show ip nhrp shortcut 10.8.0.0/24 via 192.168.254.4 Tunnel0 created 00:19:11, expire 1:40:47 Type: dynamic, Flags: router used rib NBMA address: 172.16.4.2 192.168.254.4/32 via 192.168.254.4 Tunnel0 created 00:19:11, expire 1:40:47 Type: dynamic, Flags: router nhop rib NBMA address: 172.16.4.2 90045 90002 90003 90002 90003 90002 90003 90031 90032 Unique Registration 90033 90002 We’ve discussed before that DMVPN can support dynamic IP’s on the spoke end.90003 90002 There is a catch though. By default, each tunnel IP must be mapped to a unique NBMA address. So, if the NBMA address changes, the hub will suddenly see a new mapping, which is not unique. 90003 90002 To work around this, which is indeed a Cisco recommended best practice, we configure the router to not enforce unique mappings: 90003 90002 90103 ip nhrp registration no-unique 90104 90003 90002 90003 90002 90003 90002 90003 90031 90032 References 90033 90002 Cisco Live — BRKSEC-3052: Demystifying DMVPN 90003 .90000 How to connect two routers on the same network 90001 Start with your existing network: 90002 90003 90004 ISP == modem == router # 1 (may or may not have wifi) 90005 90006 You wish to add a second router (perhaps with wifi) like 90002 90003 90004 ISP == modem == router # 1 —— router # 2 90005 90006 There are two ways to use router # 2 90002 90013 90014 isolate all devices on # 2 from those on # 1 (90015 ie no file sharing 90016) 90005 90014 make all devices visible to each other & support file sharing 90005 90020 90002 90015 To implement # 1; 90016 90002 first, find the router # 1 LAN address 90002 use IPCONFIG and the gateway address shown is the router’s address 90002 we usually see something like 192.168.X.1 90027 Then, set the router # 2 Lan address to X + 1, like 192.168.2.1 90002 connect any LAN port on # 1 to the WAN slot on # 2 and you’re done. 90029 90027 All devices on router # 2 will be able to access the Internet, but nothing on the internet will have access to router # 2 and that means if you are hosting some service of game on your system, it will need to be connected to router # 1 90002 90015 90002 To implement # 2: 90016 90002 You need to disable DHCP in router # 2 to allow all addresses to be 90002 controlled by router # 1 90029 90027 connect a pc to any router lan slot 90002 login the router using your browser and the router’s default address 90002 use the default user / password 90002 find the router settings 90002 disable DHCP 90002 save & logout 90029 90027 Now disconnect the PC and connect router # 1 lan slot to any 90002 router # 2 lan slot, 90015 leaving router # 2 WAN slot empty 90016 90029 90027 any device on router # 1 will be able to ping the devices on router # 2 and conversely.90029 90027 90015 WiFi Considerations 90016 90002 One tool that is really helpful with WiFi is inSSIDer. This helps 90002 finding a channel with the least conflicts in your location. 90029 90027 Router # 1 (if it has wifi) should be solved first 90029 90027 When you add router # 2, you can make the SSID similar to that of # 1, 90002 but add a suffix ‘2’ so you can tell them apart . 90029 90027 * IMPORTANT * 90002 Make sure that when both routers have WiFi, that they are NOT using 90002 the same channels! Otherwise, you’re interfering with yourself.90029.90000 CCNA 4 Chapter 3 Exam Answers 2019 (v5.0.3 + v6.0) 90001 90002 90003 How to find: 90004 Press 90003 «Ctrl + F» 90004 in the browser and fill in whatever wording is in the question to find that question / answer. 90007 90003 90002 NOTE: If you have the new question on this test, please comment Question and Multiple-Choice list in form below this article. We will update answers for you in the shortest time. Thank you! We truly value your contribution to the website. 90007 90004 90002 90003 1.Which broadband wireless technology is based on the 802.11 standard? 90004 90007 90016 90017 WiMAX 90018 90017 UMTS 90018 90017 90003 municipal Wi-Fi * 90004 90018 90017 CDMA 90018 90027 90002 The IEEE 802.11 standard is also known as Wi-Fi. Municipal Wi-Fi is a variant of the 802.11 standard. 90007 90002 90003 2. What is the approximate distance limitation for providing a satisfactory ADSL service from the central office to a customer? 90004 90007 90016 90017 90003 3.39 miles or 5.46 kilometers * 90004 90018 90017 2.11 miles or 3.39 kilometers 90018 90017 11.18 miles or 18 kilometers 90018 90017 6.21 miles or 10 kilometers 90018 90027 90002 For customers to receive satisfactory ADSL service, the local loop, or distance from the central office, must be less than 5.46 kilometers. 90007 90002 90003 3. What is a component of an ADSL connection that is located at the customer site? 90004 90007 90002 Customer premises equipment (CPE) is the equipment, such as a router or modem, that is located at the customer site and connects the internal network to the carrier network.90007 90002 90003 4. What is the function of the DSLAM in a broadband DSL network? 90004 90007 90016 90017 separates POTS traffic from ADSL traffic 90018 90017 separates voice from data signals 90018 90017 90003 multiplexes individual customer DSL connections into a single upstream link * 90004 90018 90017 communicates directly with customer cable modems to provide Internet services to customers 90018 90027 90002 On a DSL network the DSLAM is used to multiplex connections from DSL subscribers into a single high-capacity link.The DSLAM is located at the central office of the provider. 90007 90002 90003 5. Which broadband technology would be best for a small office that requires fast upstream connections? 90004 90007 90016 90017 90003 fiber-to-the-home * 90004 90018 90017 WiMax 90018 90017 DSL 90018 90017 cable 90018 90027 90002 Fiber-to-the-home provides fast downstream and upstream connections. DSL, cable, and WiMax provide relatively slow upstream connections. 90007 90002 90003 6. What are two WAN connection enhancements that are achieved by implementing PPPoE? (Choose two.) 90004 90007 90016 90017 An Ethernet link supports a number of data link protocols. 90018 90017 DSL CHAP features are included in PPPoE. 90018 90017 Encapsulating Ethernet frames within PPP frames is an efficient use of bandwidth. 90018 90017 90003 CHAP enables customer authentication and accounting. * 90004 90018 90017 90003 PPP enables the ISP to assign an IP address to the customer WAN interface. * 90004 90018 90027 90002 Encapsulating a PPP frame within an Ethernet frames enables IP address assignment by ISPs that are using DSL technology, as well as the ability to use CHAP for authentication and accounting.Traditional DSL does not support CHAP authentication. A traditional Ethernet link supports only Ethernet-based data link protocols. 90007 90002 90003 7. When PPPoE is configured on a customer router, which two commands must have the same value for the configuration to work? (Choose two.) 90004 90007 90016 90017 90003 dialer pool 2 * 90004 90018 90017 interface dialer 2 90018 90017 ppp chap password 2 90018 90017 interface gigabitethernet 0/2 90018 90017 90003 pppoe-client dial-pool-number 2 * 90004 90018 90017 ppp chap hostname 2 90018 90027 90002 The dialer pool number configured on both the dialer and Ethernet interfaces must match.The interface numbers and the username and the password do not have to match 90007 90002 90003 8. Why is the MTU for a PPPoE DSL configuration reduced from 1500 bytes to 1492? 90004 90007 90016 90017 to establish a secure tunnel with less overhead 90018 90017 to enable CHAP authentication 90018 90017 90003 to accommodate the PPPoE headers * 90004 90018 90017 to reduce congestion on the DSL link 90018 90027 90002 The default maximum data field of an Ethernet frame is 1500 bytes. However, in PPPoE the Ethernet frame payload includes a PPP frame which has also has a header.This reduces the available data MTU to тисячі чотиреста дев’яносто дві bytes. 90007 90002 90003 9. What are two characteristics of a PPPoE configuration on a Cisco customer router? (Choose two.) 90004 90007 90016 90017 The customer router CHAP username and password are independent of what is configured on the ISP router. 90018 90017 An MTU size of 1492 bytes is configured on the Ethernet interface. 90018 90017 90003 The Ethernet interface does not have an IP address. * 90004 90018 90017 90003 The PPP configuration is on the dialer interface.* 90004 90018 90017 The dialer pool command is applied to the Ethernet interface to link it to the dialer interface. 90018 90027 90002 PPP, CHAP, an IP address, the dialer pool number, and the MTU size are all configured on the dialer interface. The customer router CHAP username and password must match what is configured the ISP router. The pppoe-client command, not the dialer pool command, is applied to the Ethernet interface to link it to the dialer interface. 90007 90002 90003 10. Where is PPPoE configured on a Cisco router? 90004 90007 90016 90017 on any physical interface 90018 90017 90003 on the dialer interface * 90004 90018 90017 on an Ethernet interface 90018 90017 on a serial interface 90018 90027 90002 The PPPoE configuration is applied to the dialer interface, not to the Ethernet interface.The dialer interface is linked to the Ethernet interface with the dialer-pool and pppoe-client commands. 90007 90002 90003 11. How can the use of VPNs in the workplace contribute to lower operating costs? 90004 90007 90016 90017 High-speed broadband technology can be replaced with leased lines. 90018 90017 90003 VPNs can be used across broadband connections rather than dedicated WAN links. * 90004 90018 90017 VPNs prevents connectivity to SOHO users. 90018 90017 VPNs require a subscription from a specific Internet service provider that specializes in secure connections.90018 90027 90002 VPN technology can be used with broadband connectivity or more expensive leased lines. VPNs provide connectivity between offices, users, and SOHO environments. VPNs do not require a specific ISP to be used. 90007 90002 90003 12. How is «tunneling» accomplished in a VPN? 90004 90007 90016 90017 All packets between two hosts are assigned to a single physical medium to ensure that the packets are kept private. 90018 90017 A dedicated circuit is established between the source and destination devices for the duration of the connection.90018 90017 Packets are disguised to look like other types of traffic so that they will be ignored by potential attackers. 90018 90017 90003 New headers from one or more VPN protocols encapsulate the original packets. * 90004 90018 90027 90002 Packets in a VPN are encapsulated with the headers from one or more VPN protocols before being sent across the third party network. This is referred to as «tunneling». These outer headers can be used to route the packets, authenticate the source, and prevent unauthorized users from reading the contents of the packets.90007 90002 90003 13. Which two statements describe a remote access VPN? (Choose two.) 90004 90007 90016 90017 90003 It may require VPN client software on hosts. * 90004 90018 90017 It requires hosts to send TCP / IP traffic through a VPN gateway. 90018 90017 It connects entire networks to each other. 90018 90017 90003 It is used to connect individual hosts securely to a company network over the Internet. * 90004 90018 90017 It requires static configuration of the VPN tunnel. 90018 90027 90002 Remote access VPNs can be used to support the needs of telecommuters and mobile users by allowing them to connect securely to company networks over the Internet.To connect hosts to the VPN server on the corporate network, the remote access VPN tunnel is dynamically built by client software that runs on the hosts. 90007 90002 90003 14. Which is a requirement of a site-to-site VPN? 90004 90007 90016 90017 It requires hosts to use VPN client software to encapsulate traffic. 90018 90017 It requires the placement of a VPN server at the edge of the company network. 90018 90017 It requires a client / server architecture. 90018 90017 90003 It requires a VPN gateway at each end of the tunnel to encrypt and decrypt traffic.* 90004 90018 90027 90002 Site-to-site VPNs are static and are used to connect entire networks. Hosts have no knowledge of the VPN and send TCP / IP traffic to VPN gateways. The VPN gateway is responsible for encapsulating the traffic and forwarding it through the VPN tunnel to a peer gateway at the other end which decapsulates the traffic. 90007 90002 90003 15. What functionality does mGRE provide to the DMVPN technology? 90004 90007 90016 90017 90003 It allows the creation of dynamically allocated tunnels through a permanent tunnel source at the hub and dynamically allocated tunnel destinations at the spokes.* 90004 90018 90017 It provides secure transport of private information over public networks, such as the Internet. 90018 90017 It is a Cisco software solution for building multiple VPNs in an easy, dynamic, and scalable manner. 90018 90017 It creates a distributed mapping database of public IP addresses for all VPN tunnel spokes. 90018 90027 90002 DMVPN is built on three protocols, NHRP, IPsec, and mGRE. NHRP is the distributed address mapping protocol for VPN tunnels. IPsec encrypts communications on VPN tunnels.The mGRE protocol allows the dynamic creation of multiple spoke tunnels from one permanent VPN hub. 90007 90002 90003 16. Which two scenarios are examples of remote access VPNs? (Choose two.) 90004 90007 90016 90017 A toy manufacturer has a permanent VPN connection to one of its parts suppliers. 90018 90017 All users at a large branch office can access company resources through a single VPN connection. 90018 90017 A small branch office with three employees has a Cisco ASA that is used to create a VPN connection to the HQ.90018 90017 90003 An employee who is working from home uses VPN client software on a laptop in order to connect to the company network. * 90004 90018 90017 90003 A mobile sales agent is connecting to the company network via the Internet connection at a hotel. * 90004 90018 90027 90002 Remote access VPNs connect individual users to another network via a VPN client that is installed on the user device. Site-to-site VPNs are «always on» connections that use VPN gateways to connect two sites together.Users at each site can access the network on the other site without having to use any special clients or configurations on their individual devices. 90007 90002 90003 17. Refer to the exhibit. What solution can provide a VPN between site A and site B to support encapsulation of any Layer 3 protocol between the internal networks at each site? 90004 90313 90314 90007 90016 90017 a remote access tunnel 90018 90017 90003 a GRE tunnel * 90004 90018 90017 an IPsec tunnel 90018 90017 Cisco SSL VPN 90018 90027 90002 A Generic Routing Encapsulation (GRE) tunnel is a non-secure, site-to-site VPN tunneling solution that is capable of encapsulating any Layer 3 protocol between multiple sites across over an IP internetwork.90007 90002 90003 18. Which three statements are characteristics of generic routing encapsulation (GRE)? (Choose three.) 90004 90007 90016 90017 90003 GRE does not have strong security mechanisms. * 90004 90018 90017 The GRE header alone adds at least 24 bytes of overhead. 90018 90017 90003 GRE is stateless. * 90004 90018 90017 90003 GRE encapsulation supports any OSI Layer 3 protocol. * 90004 90018 90017 GRE is the most secure tunneling protocol. 90018 90017 GRE provides flow control by default.90018 90027 90002 GRE uses a protocol type field in the GRE header to support the encapsulation of any OSI Layer 3 protocol. GRE itself is stateless; it does not include any flow-control mechanisms by default. GRE does not have strong security mechanisms. 90007 90002 90003 19. Refer to the exhibit. Which IP address is configured on the physical interface of the CORP router? 90004 90313 90360 90007 90016 90017 10.1.1.1 90018 90017 90003 209.165.202.133 * 90004 90018 90017 209.165.202.134 90018 90017 10.1.1.2 90018 90027 90002 The tunnel source and tunnel destination addresses reference the IP addresses of the physical interfaces on the local and remote routers respectively. 90007 90002 90003 20. Refer to the exhibit. Which IP address would be configured on the tunnel interface of the destination router? 90004 90313 90380 90007 90016 90017 209.165.200.226 90018 90017 209.165.200.225 90018 90017 172.16.1.1 90018 90017 90003 172.16.1.2 * 90004 90018 90027 90002 The IP address that is assigned to the tunnel interface on the local router is 172.16.1.1 with a prefix mask of / 30. The only other address, 172.16.1.2, would be the destination tunnel interface IP address. Although 209.165.200.226 is listed as a destination address in the output, this is the address of the physical interface at the destination, not the tunnel interface. 90007 90002 90003 21. Refer to the exhibit. A tunnel was implemented between routers R1 and R2. Which two conclusions can be drawn from the R1 command output? (Choose two.) 90004 90313 90400 90007 90016 90017 90003 The data that is sent across this tunnel is not secure.* 90004 90018 90017 This tunnel mode is not the default tunnel interface mode for Cisco IOS software. 90018 90017 This tunnel mode provides encryption. 90018 90017 90003 A GRE tunnel is being used. * 90004 90018 90017 This tunnel mode does not support IP multicast tunneling. 90018 90027 90002 According to the R1 output, a GRE tunnel mode was specified as the tunnel interface mode. GRE is the default tunnel interface mode for Cisco IOS software. GRE does not provide encryption or any other security mechanisms.Therefore, data that is sent across a GRE tunnel is not secure. GRE supports IP multicast tunneling. 90007 90002 90003 22. What is used by BGP to determine the best path to a destination? 90004 90007 90016 90017 cost 90018 90017 administrative distance 90018 90017 hop count 90018 90017 90003 attributes * 90004 90018 90027 90002 BGP uses attributes, such as AS-path, to determine the best path to a destination. 90007 90002 90003 23. What command specifies a BGP neighbor that has an IP address of 5.5.5.5 / 24 and that is in AS 500? 90004 90007 90016 90017 90003 (config-router) # neighbor 5.5.5.5 remote-as 500 * 90004 90018 90017 (config-router) # network 5.0.0.0 0.0.0.255 90018 90017 (config-router) # router bgp 500 90018 90017 ( config-router) # neighbor 500 remote-as 5.5.5.5 90018 90027 90002 The neighbor command is used to specify an EBGP neighbor router and peer with it. The command requires that the AS number of the neighbor be included as part of the command. 90007 90002 90003 24.True or False? Multiple BGP processes can run on a router. 90004 90007 90002 Because a BGP router can only belong to a single autonomous system, it can only run a single BGP process. 90007 90002 90003 25. Refer to the exhibit. Which two configurations will allow router R1 to establish a neighbor relationship with router R2? (Choose two.) 90004 90313 90466 90007 90016 90017 R1 (config) # router bgp 65001 90313 R1 (config-router) # network 192.168.20.0R2 (config) # router bgp 65002 90313 R2 (config-router) # network 192.168.10.0 90313 R2 (config-router) # neighbor 209.165.200.226 remote-as 65002 90018 90017 90003 R2 (config) # router bgp 65002 90313 R2 (config-router) # network 192.168.20.0 90313 R2 (config-router) # neighbor 209.165.200.225 remote-as 65001 * 90004 90018 90017 R1 (config) # router bgp 65002 90313 R1 (config-router) # network 192.168.20.0 90313 R1 (config-router) # neighbor 209.165.200.225 remote-as 65001 90018 90017 90003 R1 (config) # router bgp 65001 90313 R1 (config-router) # network 192.168.10.0 90313 R1 (config-router) # neighbor 209.165.200.226 remote-as 65002 * 90004 90018 90017 R2 (config) # router bgp 65002 90313 R2 (config-router) # network 192.168.10.0 90018 90027 90002 To configure EBGP, the router bgp command is followed by the AS number in which the router resides. Conversely, the neighbor command contains the AS number to which the remote router belongs. 90007 90002 90003 26. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. 90313 What is the code displayed on the web page? 90004 90007 90016 90017 Welldone! 90018 90017 BGP is configured! 90018 90017 90003 BGP is running! * 90004 90018 90017 Configuration is correct! 90018 90027 90002 The basic EBGP configuration includes the following tasks: 90313 Step 1: Enable BGP routing.90313 Step 2: Configure the BGP neighbors or neighbor. 90313 Step 3: Advertise the network or networks originating from the AS. 90007 90518 Older Version 90519 90002 90003 27. At which layer of the OSI model does multiplexing take place? 90004 90007 90016 90017 90003 Layer 1 * 90004 90018 90017 Layer 2 90018 90017 Layer 3 90018 90017 Layer 4 90018 90027 90002 90003 28. Which command can be used to view the cable type that is attached to a serial interface? 90004 90007 90016 90017 Router (config) # show interfaces 90018 90017 90003 Router (config) # show controllers * 90004 90018 90017 Router (config) # show ip interface 90018 90017 Router (config) # show ip interface brief 90018 90027 90002 90003 29.Which field marks the beginning and end of an HDLC frame? 90004 90007 90002 90003 30. Which serial 0/0/0 interface state will be shown if no serial cable is attached to the router, but everything else has been correctly configured and turned on? 90004 90007 90016 90017 Serial 0/0/0 is up, line protocol is up 90018 90017 Serial 0/0/0 is up, line protocol is down 90018 90017 90003 Serial 0/0/0 is down, line protocol is down * 90004 90018 90017 Serial 0/0/0 is up (looped) 90018 90017 Serial 0/0/0 is up (disabled) 90018 90017 Serial 0/0/0 is administratively down, line protocol is down 90018 90027 90002 90003 31.Which is an advantage of using PPP on a serial link instead of HDLC? 90004 90007 90016 90017 90003 option for authentication * 90004 90018 90017 higher speed transmission 90018 90017 fixed-size frames 90018 90017 option for session establishment 90018 90027 90002 90003 32. What are three components of PPP? (Choose three.) 90004 90007 90016 90017 authentication 90018 90017 90003 LCP * 90004 90018 90017 multilink 90018 90017 90003 NCP * 90004 90018 90017 compression 90018 90017 90003 HDLC-like framing * 90004 90018 90027 90002 90003 33.How does PPP interface with different network layer protocols? 90004 90007 90016 90017 90003 by using separate NCPs * 90004 90018 90017 by negotiating with the network layer handler 90018 90017 by encoding the information field in the PPP frame 90018 90017 by specifying the protocol during link establishment through LCP 90018 90027 90002 90003 34. Which address is used in the Address field of a PPP frame? 90004 90007 90016 90017 a single byte of binary 00000000 90018 90017 a single byte of binary 10101010 90018 90017 90003 a single byte of binary 11111111 * 90004 90018 90017 the IP address of the serial interface 90018 90027 90002 90003 35.Which three physical layer interfaces support PPP? (Choose three.) 90004 90007 90016 90017 FastEthernet 90018 90017 GigabitEthernet 90018 90017 POTS 90018 90017 90003 asynchronous serial * 90004 90018 90017 90003 synchronous serial * 90004 90018 90017 90003 HSSI * 90004 90018 90027 90002 90003 36. Which three are types of LCP frames used with PPP? (Choose three.) 90004 90007 90016 90017 link-negotiation frames 90018 90017 link-acknowledgment frames 90018 90017 90003 link-maintenance frames * 90004 90018 90017 90003 link-termination frames * 90004 90018 90017 link-control frames 90018 90017 90003 link-establishment frames * 90004 90018 90027 90002 90003 37.Which protocol will terminate the PPP link after the exchange of data is complete? 90004 90007 90002 90003 38. During a PPP session establishment phase, which two messages are sent by the requested party if the options are not acceptable? (Choose two.) 90004 90007 90016 90017 90003 Configure-Nak * 90004 90018 90017 Code-Reject 90018 90017 Protocol-Reject 90018 90017 90003 Configure-Reject * 90004 90018 90017 Discard-Request 90018 90027 90002 90003 39. Which three statements are true about PPP? (Choose three.) 90004 90007 90016 90017 90003 PPP can use synchronous and asynchronous circuits. * 90004 90018 90017 PPP can only be used between two Cisco devices. 90018 90017 PPP carries packets from several network layer protocols in LCPs. 90018 90017 90003 PPP uses LCPs to establish, configure, and test the data link connection. * 90004 90018 90017 90003 PPP uses LCPs to agree on format options such as authentication, compression, and error detection. * 90004 90018 90027 90002 90003 40. Which PPP option can detect links that are in a looped-back condition? 90004 90007 90016 90017 90003 Magic Number * 90004 90018 90017 MRU 90018 90017 Callback 90018 90017 ACCM 90018 90027 90002 90003 41.When configuring Multilink PPP, where is the IP address for the multilink bundle configured? 90004 90007 90016 90017 on a physical serial interface 90018 90017 on a subinterface 90018 90017 90003 on a multilink interface * 90004 90018 90017 on a physical Ethernet interface 90018 90027 90002 90003 42. Refer to the exhibit. Which statement describes the status of the PPP connection? 90004 90777 90007 90016 90017 Only the link-establishment phase completed successfully. 90018 90017 Only the network-layer phase completed successfully.90018 90017 Neither the link-establishment phase nor the network-layer phase completed successfully. 90018 90017 90003 Both the link-establishment and network-layer phase completed successfully. * 90004 90018 90027 90002 90003 43. Refer to the exhibit. A network administrator is configuring the PPP link between the two routers. However, the PPP link can not be established. Based on the partial output of the show running-config command, what is the cause of the problem? 90004 90794 90007 90016 90017 The usernames do not match.90018 90017 90003 The passwords do not match. * 90004 90018 90017 The passwords should be longer than 8 characters. 90018 90017 The interface IP addresses are in different subnets. 90018 90027 90002 90003 44. In which situation would the use of PAP be preferable to the use of CHAP? 90004 90007 90016 90017 when router resources are limited 90018 90017 when multilink PPP is used 90018 90017 90003 when plain text passwords are needed to simulate login at the remote host * 90004 90018 90017 when a network administrator prefers it because of ease of configuration 90018 90027 90002 90003 45.A network administrator is evaluating authentication protocols for a PPP link. Which three factors might lead to the selection of CHAP over PAP as the authentication protocol? (Choose three.) 90004 90007 90016 90017 establishes identities with a two-way handshake 90018 90017 90003 uses a three-way authentication periodically during the session to reconfirm identities * 90004 90018 90017 control by the remote host of the frequency and timing of login events 90018 90017 90003 transmits login information in encrypted format * 90004 90018 90017 90003 uses an unpredictable variable challenge value to prevent playback attacks * 90004 90018 90017 makes authorized network administrator intervention a requirement to establish each session 90018 90027 90002 90003 46.Refer to the exhibit. Based on the debug command output that is shown, which statement is true of the operation of PPP. 90004 90851 90007 90016 90017 CHAP authentication failed because of an unknown hostname. 90018 90017 90003 A PPP session was successfully established. * 90004 90018 90017 Both PAP and CHAP authentication were attempted. 90018 90017 The debug output is from router R2. 90018 90027 90002 90003 47. Match the PPP option with the correct description. (Not all options are used.) 90004 90313 90869 90007 90002 90872 Place the options in the following order: 90003 Compression -> Increases the effective throughput on PPP connections by reducing the amount of data in the frame that must travel across the link. 90004 90313 90003 Multilink -> Provides load balancing over the router interfaces. 90004 90313 90003 Maximum Receive Unit -> The maximum size of the PPP frame 90004 90313 90003 — not scored — 90004 90313 90003 Authentication Protocol -> The two choices are Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) 90004 90007 90002 90003 48.Match the steps to the PPP CHAP authentication process sequence. (Not all options are used.) 90004 90313 90892 90007 90002 90895 90003 Place the options in the following order: 90004 90007 90002 90003 Step 3 -> calculate the MD5 hash * 90004 90313 90003 Step 2 -> calculate the ID and random number * 90004 90313 90003 Step 4 -> send challenge ID, hash, and username * 90004 90313 90003 Step 1 -> use LCP to negotiate the type of authentication * 90004 90313 90003 — not scored — 90004 90313 90003 Step 5 -> calculate the hash based on received information * 90004 90313 90003 Step 6 -> compare the received hash with the calculated hash 90004 90007 90002 90003 49.Match the phases of establishing a PPP session in the correct order. (Not all options are used.) 90004 90313 90925 90007 90002 90928 90313 90003 Place the options in the following order: 90004 90313 90003 Phase 3 -> negotiate with the network layer to configure L3 protocol 90004 90313 90003 — not scored — 90004 90313 90003 Phase 1 90004 90003 -> establish the link and negotiate configuration options 90004 90313 90003 Phase 2 90004 90003 -> determine the quality of the link 90004 90007 90002 90003 50.Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Why is the serial link between router R1 and router R2 not operational? 90004 90313 90953 90007 90016 90017 The encapsulation in both routers does not match. 90018 90017 The passwords are different in both routers. 90018 90017 90003 In each case the expected username is not the same as the remote router hostname. * 90004 90018 90017 The authentication type is not the same in both routers. 90018 90027 90002 90003 51.What PPP information will be displayed if a network engineer issues the show ppp multilink command on Cisco router? 90004 90007 90016 90017 the IP addresses of the link interfaces 90018 90017 90003 the serial interfaces participating in the multilink * 90004 90018 90017 the queuing type on the link 90018 90017 the link LCP and NCP status 90018 90027 90002 90003 52. Refer to the exhibit. What type of Layer 2 encapsulation will be used for connection D on the basis of this configuration on a newly installed router: 90004 90313 90003 RtrA (config) # 90004 interface serial0 / 0/0 90 313 90003 RtrA (config-if) # 90004 ip address 128.107.0.2 255.255.255.252 90313 90003 RtrA (config-if) # 90004 no shutdown 90995 90007 90016 90017 Ethernet 90018 90017 Frame Relay 90018 90017 90003 HDLC * 90004 90018 90017 PPP 90018 90027 90002 90003 53. A network engineer is monitoring an essential, but poor quality, PPP WAN link that periodically shuts down. An examination of the interface configurations shows that the ppp quality 90 command has been issued. What action could the engineer take to reduce the frequency with which the link shuts down? 90004 90007 90016 90017 90003 Issue the command ppp quality 70.* 90004 90018 90017 Issue the command ppp quality 100. 90018 90017 Set the DCE interface to a lower clock rate. 90018 90017 Use the bandwidth command to increase the bandwidth of the link. 90018 90027 90002 90003 54. A network engineer is troubleshooting the loss of MPEG video viewing quality as MPEG video files cross a PPP WAN link. What could be causing this loss of quality? 90004 90007 90016 90017 Link Quality Monitoring was not configured correctly on each interface. 90018 90017 90003 The compress command was used when PPP was configured on the interfaces.* 90004 90018 90017 The clock rates configured on each serial interface do not match. 90018 90017 PAP authentication was misconfigured on the link interfaces. 90018 90027 90002 90003 Download PDF File below: 90004 90007.90000 Connecting Two Routers Within One Network: Boosting Wi-Fi, Shared Resources 90001 90002 Read this article to find out how to connect two or more routers to one network, 90003 how to boost your Wi-Fi network signal or create one more access point within the existing network 90004. We will consider two ways of doing it — with a cable or Wi-Fi connection. 90005 90006 90002 90008 90009 90005 90011 Why Would You Combine Several Routers Into One Network? 90012 90002 In some situations, one router may be insufficient to build a network or provide high-quality Wi-Fi coverage.It means that it may be unable to provide the desired Wi-Fi coverage area or may not have the number of ports required for the devices that are connected to such network. Some rooms or premises may appear to be beyond the range of your router’s Wi-Fi signal. This situation is well-known to people who dealt with the task of building a Wi-Fi network in a large house, apartment or an office consisting of many rooms. If it happens, additional equipment has to be installed to extend the network to the desired coverage.And it’s not that difficult as it may seem. 90005 90002 There are several ways of doing it which we are going to discuss in this article: 90005 90017 90018 The first variant is connecting two or more routers with a cable. You will have to lay the cable from one router to the other (s). Doing it is not always convenient, but it is the most stable and reliable way to get them connected. If you want a steadily operating network with high speed for a number of devices, the routers should use cable connection.90019 90018 The second variant is connecting the routers by Wi-Fi. In this case, the bridge connection (WDS) is used, or the repeater mode. In fact, they are the same, but these settings are implemented differently in routers by different manufacturers. 90019 90022 90023 90002 So, here is the starting point. We have the main router connected to the Internet, and it broadcasts a Wi-Fi network. We need to install one more router, for example, in another room or on another floor.This second router will kind of boost the Wi-Fi network provided by the main router and help to extend the same network so that it covers more distant premises. 90005 90002 The second router can be connected to the main router by cable or Wi-Fi. 90005 90002 Let’s have a closer look at both connection methods. 90005 90011 How to Connect Routers by Wi-Fi? 90012 90002 Most often, routers are connected by Wi-Fi, and it seems natural as it spares you the efforts for laying cables and drilling holes through the walls.90005 90002 In my case, the main router is TP-link TL-WR841N. It broadcasts a Wi-Fi network with the name 90003 hetmansoftware. 90004 90005 90038 90002 Please bear in mind that the router we are going to connect to in the bridge mode should be configured already. That is, the Internet connection should be up and running, with the Wi-Fi network being broadcast. 90005 90002 There is a special article on how to configure a router and a detailed video guide to help you find your way through the process.You are welcome to view these materials for better understanding. 90005 90043 90002 Before you move on to configure the second router, it is necessary to change the settings of the main router’s wireless network so that the channel for this network will be static instead of automatic. 90005 90002 For example, if your main router is another TP-Link, you can change the channel in the settings, by visiting the 90003 Wireless 90004 tab. In the field 90003 Channel 90004 specify a static channel.For example: 1, or 9, anything. Save the settings. 90005 90052 90002 Now that the static channel has been set, you can exit the main router’s settings. 90005 90002 Let’s configure the router that will operate in the WDS mode. In my case, the specific model being used is TР-Link Archer C20. Go to the router settings. 90005 90057 90002 For starters, you need to change the IP address of the second router. You have to avoid the situation of having two devices with the same IP addresses within one network.For example, if the main router has the IP address 192.168.0.1, and the other router also has the address 192.168.0.1, the two addresses will be in conflict. Go to the tab 90003 Network / LAN. 90004 In the field 90003 IP address 90004 change the last digit — say, put 2 instead of 1. Or, as in my case, change it from 192.168.1.1 to 192.168.0.2. Save the modified settings. 90005 90064 90002 Why should you do it this way? You need to know the IP address of the main router which you are going to connect to.If it has the address 192.168.1.1, then the address for the router which you want to connect by WDS should be changed to 192.168.1.2. If the main router has the address 192.168.0.1, you should assign the other router the following address: 192.168.0.2. It is important to have both routers in one subnetwork. 90005 90002 Go to the settings again, but this time the IP address will be different — 192.168.0.2. The one you have specified before. 90005 90069 90002 Go to the tab 90003 Wireless 90004/90003 Basic Settings.90004 In the field 90003 Wireless Network Name 90004 you can specify the name of the second wireless network. In the field 90003 Channel, 90004 make sure you give the same channel that you have specified in the settings of the main router. In my case, the channel is 9. 90005 90080 90002 Now check the box next to 90003 Enable WDS, 90004 and click on 90003 Scan. 90004 90005 90087 90002 From the list, select the network that your router will get its Internet connection from.Click on the 90003 Connect 90004 link next to the network you have chosen. 90005 90092 90002 Now the only thing left to do is give the password to the main network in the 90003 Password 90004 field. Type it and click on the 90003 Save 90004 button. 90005 90099 90002 After rebooting, go to the second router’s settings again. While you are in the main page (the 90003 Status 90004 tab) look at the 90003 Wireless 90004 section. It should say 90003 Enabled 90004 in the line 90003 WDS Status.90004 It means that the second router has already connected to the main router, and now it is supposed to broadcast Wi-Fi. 90005 90110 90002 However, the Internet connection will be available by Wi-Fi only, and if you connect devices to the router (operating in the WDS mode) with a cable, they will not be able to go online. 90005 90002 To set up this function properly, you should disable DHCP server for the router which has the WDS bridge configured — that is, for the router which is the secondary one in my case.It is also necessary to have its local IP address in the same subnetwork where the primary (main) router belongs to. 90005 90002 That is why you should enter the DHCP menu of the secondary router and disable this function. 90005 90117 90002 This is the last step in getting two routers connected by Wi-Fi. 90005 90002 Find the right location to place the second router there so that it falls within the effective range of the main router. Set the desired name for the wireless network and a password.We have already described this step in detail in our article about configuring Wi-Fi mode for a router. 90005 90011 How to Build a Network of Several Routers with a Cable Connection? 90012 90002 There are two ways to connect several routers into one network with a cable. They are as follows: 90005 90017 90018 90002 The so-called LAN / LAN connection. That is, building a network consisting of several routers by connecting their LAN ports with a network cable.90005 90130 90019 90018 90002 And LAN / WAN connection. That is, building a network consisting of several routers by connecting the LAN port of the main router with the WAN / Internet port of the secondary router with a network cable. 90005 90135 90019 90022 90002 Let’s consider each one in detail. 90005 90140 LAN / LAN Connection 90141 90002 In case of a LAN / LAN connection, take two routers and decide which one you want to use as the main device.Usually it is the router which receives the Internet connection cable from your Internet service provider. 90005 90002 Use a network cable to connect LAN ports of the main router with the additional (secondary) router. 90005 90146 90002 90148 90005 90002 Let’s suppose that we have already configured the Internet connection for the first router, so I will skip this step. If the main router does not have any Internet connection yet, fix this problem — just read our article on basic settings of a Wi-Fi router.90005 90002 Connect to the first device 90005 90017 90018 90002 and check if it has DHCP server enabled. By default, it is usually enabled. To do it, go to the menu DHCP / DHCP Settings. 90005 90158 90019 90018 90002 If DHCP Server is disabled, enable it. 90005 90019 90018 90002 Do not forget to save changes. 90005 90019 90022 90002 Then connect to the other device, 90005 90017 90018 90002 And disable DHCP Server, because it will receive all addresses from the main router.To do it, go to the menu 90003 DHCP 90004/90003 DHCP Settings. 90004 90005 90179 90019 90018 90002 If DHCP Server is enabled, disable it. 90005 90019 90018 90002 In the section 90003 Network 90004/90003 LAN 90004 change the IP address so that it does not coincide with that of the main router. For example, change it to 192.168.0.2. Because the main router has 192.168.0.1 90005 90019 90018 90002 Save.90005 90196 90019 90022 90002 After rebooting the secondary router, it should be working in one network with the first (primary / main) one, Receive the Internet connection from it, and operate as an access point. 90005 90140 LAN / WAN Connection. 90141 90002 The second method of combining two routers into one network is with a network cable. 90005 90002 In case of a LAN / WAN connection, use a network cable to connect the LAN port of the main router with the WAN / Internet port of the other (secondary) router.90005 90207 90002 90209 90005 90002 Connect to the first device: 90005 90017 90018 90002 and check if it has DHCP server enabled. By default, it is usually enabled. To do it, go to the menu 90003 DHCP 90004/90003 DHCP Settings. 90004 90005 90221 90019 90018 90002 If DHCP Server is disabled, enable it. 90005 90019 90018 90002 Do not forget to save changes.90005 90019 90022 90002 Then connect to the other device, 90005 90017 90018 90002 For the other device, go to the section 90003 Network 90004/90003 WAN 90004 and set the Connection Type as 90003 Dynamic IP. 90004 Save the changes. 90005 90244 90019 90018 90002 In the 90003 DHCP 90004 section, leave DHCP Server enabled. 90005 90251 90019 90018 90002 If you are planning to use LAN ports of the secondary router, make sure that their IP addresses do not come into conflict with the corresponding addresses of the primary router.90005 90002 That is, if your primary router operates within the range of 192.168.0.100 to 192.168.0.199, it is better to have the secondary router range from 192.168.0.200 to 192.168.0.299, but always within the main subnetwork. 90005 90019 90018 90002 Save. 90005 90019 90022 90002 After that, a separate access point can be launched for each of the routers. If you did everything right, both routers will have an Internet connection, operate within one network and be able to access network devices.90005 90002 Those were all methods of connecting several routers to one network, wireless or wired. 90005 90002 If you have any questions while you are combining several routers into one network, you are welcome to ask by posting a comment. 90005 90002 90271 90009 90005.