7.5.6 Adjacency Troubleshooting

You have an ospf network, the dead interval has been set to 30. Which of the following commands would you use to change the dead interval on an interface back to the default?

(config-if)#ip ospf dead-interval 40

You have configured OSPF routing on RouterA. A partial configuration is shown below: hostname RouterA!interface FastEthernet 0/0ip address 172.16.1.1 255.255.255.224duplex autospeed auto!interface FastEthernet 0/1ip address 172.16.1.33 255.255.255.240duplex autospeed auto!interface Serial 0/1/0ip address 172.16.1.62 255.255.255.252encapsulation ppp!router ospf 100network 172.16.1.0 0.0.0.31 area 0! RouterA is connected to RouterB through the serial link. When you check RouterA, it has not learned of any routes connected to RouterB. What should you do to correct the problem?

Add a network statement that uses a network of 172.16.1.32 and a wildcard mask of 0.0.0.31.

You've just configured Router_London as shown. The router is part of EIGRP autonomous system 200. Both directly connected networks 172.17.0.0 and 172.18.0.0 are to be advertised to neighbor routers within Area 200. When testing your router, you discover the neighboring routers have no entries in their routing table for your subnets. What is the problem?

The area is incorrectly configured.

You need to view the configuration settings of an interface on your router to see if it can send or respond to OSPF Hello messages. Which command should you use?

show ip ospf interface <interface>

You have configured Router A, Router B, and Router C as shown. Users in network 10.0.0.0 report that they have no trouble accessing resources within their own network, but claim they cannot access a database located on subnet 192.168.0.0. Users all the other networks claim they are having no problems accessing the database. What is the problem?

Router A has been configured with an incorrect network address.

You have configured Router A, Router B, and Router C as shown. Users in network 10.1.1.0 claim they cannot access resources in network 192.168.2.0. What is the problem?

Router C is configured with the incorrect area number.

You are reviewing the configuration of a router that uses EIGRP for its routing protocol. The output from the show ip eigrp topology all-links command is as follows: Router# show ip eigrp topology all-linksIP-EIGRP Topology Table for process 77Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,r - Reply statusP 172.16.90.0 255.255.255.0, 2 successors, FD is 46251776via 172.16.80.28 (46251776/46226176), Ethernet0via 172.16.81.28 (46251776/46226176), Ethernet1via 172.16.80.31 (46277376/46251000), Serial0via 172.16.81.31 (46277400/46251800), Serial1 Based on the output, which of the following are true? (Select two.)

Ethernet0 and Ethernet1 are successor routes. Serial0 is a feasible successor route.

On an OSPF network what are the default Intervals for the Hello, Dead, Wait, and Retransmit timers?

Hello 10, Dead 40, Wait 40, Retransmit 5

The Houston router is connected to the Dallas router with a serial link. You have configured both routers with OSPF. You use the debug ip ospf events command and see the following output: *Feb 8 14:13:45.299: OSPF: Send hello to 224.0.0.5 area 0 on Serial0/1/0 from 10.0.0.1*Feb 8 14:13:47.655: OSPF: Rcv hello from 192.168.1.83 area 0 from Serial0/1/0 10.0.0.2*Feb 8 14:13:47.655: OSPF: Mismatched hello parameters from 10.0.0.2*Feb 8 14:13:47.655: OSPF: Dead R 40 C 40, Hello R 10 C 20*Feb 8 14:14:07.655: OSPF: 192.168.1.83 address 10.0.0.2 on Serial0/1/0 is dead*Feb 8 14:14:07.655: %OSPF-5-ADJCHG: Process 100, Nbr 192.168.1.83 on Serial0/1/0 from FULL to DOWN, Neighbor Down: Dead timer expired What is the problem?

The hello timer configured on the Dallas router is incorrect.

You are reviewing the configuration of a router that uses EIGRP for its routing protocol. The output from the show ip protocols command is as follows: Routing Protocol is "eigrp 1"Outgoing update filter list for all interfaces is not setIncoming update filter list for all interfaces is not setDefault networks flagged in outgoing updatesDefault networks accepted from incoming updatesEIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0EIGRP maximum hopcount 100EIGRP maximum metric variance 2Redistributing: eigrp 1EIGRP NSF-aware route hold timer is 240sAutomatic network summarization is in effectMaximum path: 5Routing for Networks:192.168.1.0192.168.2.0192.168.3.0Routing Information Sources:Gateway Distance Last Update192.168.1.12 90 00:55:50192.168.2.15 90 00:55:50Distance: internal 90 external 170 Based on the output, what is true of this configuration? (Select two.)

The routing process has two neighbors. EIGRP is sharing information about three networks.