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If we now check the EIGRP neighbors on R1, we should see R2 there:Īt this point, there is IP connectivity among the entire .0/24 network. The easiest device to reconfigure is R2, because R1 is already peering correctly with R3 reconfiguring R1 means we will also reconfigure R3.Īs such, the required change on R2 is as follows: no router eigrp 23 Therefore, we need to reconfigure one of the devices to match the other. If you refer to the show ip eigrp neighbors command output on R1 above, we see that the EIGRP AS on R1 is 123 not 23. However, take a look at the EIGRP AS number: 23. We can use the show ip protocols command to see the different routing protocols that have been configured on R2: Why is R2 not listed as an EIGRP neighbor? Let’s go to R2 to find out. Both IP addresses actually belong to R3-one over the frame-relay network and the other is the direct link to R1. We will start with R1 and view the EIGRP neighbors using the show ip eigrp neighbors command: Let’s now move on to EIGRP troubleshooting. Looking at the configuration on that interface, we can see why:įor frame-relay to work, that interface must be configured with the encapsulation frame-relay command as follows: interface Serial0/1/0Įven without pinging, we see that the EIGRP neighbor adjacency has formed between R1 and R3:Ĭool, so we have IP connectivity.
Free packet tracer activity exercise files serial#
So let’s go over to R3 to check what is happening on that router’s frame-relay interface:Īs you can see from the output of the show interface command above, the serial interface is using the default encapsulation of HDLC. It seems R1 does not have a DLCI associated with R3. Since inverse ARP is turned on by default, we can use the show frame-relay map command to make sure DLCIs are correctly learned and associated:
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R1 can ping R2 over the frame-relay network but not R3. Now let’s go check the IP connectivity from the routers themselves. Note: Go ahead and confirm the DLCIs are correct e.g., R1R2 is 102 while R2R1 is 201. Therefore, we need to make sure that the frame-relay device (cloud) is correctly configured: The first place to start in this type of scenario is to confirm that there is underlying L1/L2 connectivity between the routers. Trblsht_wan_eigrp_final.pkt: This Packet Tracer file contains the lab with the issues resolved.