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ccent 200-301.240 Chapter 11 Troubleshooting IPv4 Routing Protocols ospf Command Number) does not need to match. Note that in Example 11-12, again the first line of output shows R3 using the router ospf3 command based on the phrase "Process ospf 3" while R1 uses the router ospf1 command as described in the phrase (Process ospf1). These mismatched IDs are not the problem. Finding OSPF Hello and Dead Timer Mismatches Finally, think about the problem that arises on R4 with a different Hello and Dead configuration than the default settings on Rl, R2, and R3. Given that EIGRP enables neighbors to use different Hello timers while OSPF does not, this mismatch prevents R4 from being a neighbor to the other three OSPF routers. Example 11-13 shows the simplest way to find a mismatch using the showipospfinterface command on R1 and R4. This command lists the Hello and Failure timers for each interface, as shown in the shaded portion of the figure. Note that R1 uses 10 and 40 (Hello and Failure timers) while R4 uses 5 and 20.Example 11-13 Finding a Mismatch Hello/Dead (Failure) TimerRl# show ip ospf interface G0/0 GigabitEthernet0/0 isup, line protocol is up Internet Address 10.1.1.1/24, Area 0, Attached via Network StatementBaseTopology NameProcessID1,RouterID1.1.1.1,NetworkTypnoe BROADCAST,noCost: 1 Topology-MTID Cost Disabled Shutdown Transmit Delay is 1 sec. state DR, Priority 1 Designated Router (ID) 1.1.1.1, Interface address No backup designated router on this network Timer intervals configured, Hello 10, Dead 4C|, Wait 40, Retransmit 5! linesomitted for brevitylinesomitted for brevity ! Moving on toR4 nextR4# showip osp￡interface Gi0/0 GigabitEthernet0/0 isup, line protocol is up 0, Attached via Network StatementProcess ID 4, Router ID 10.1.44.4, Network Type BROADCAST, Cost: 1Internet Address 10.1.1.4/24, AreaTransmit Delay is 1 sec. state DR, Priority 1