If you are experiencing end-to-end connectivity problems in your Frame Relay network,
check the routing tables to see whether the routers have a route to the destination with
which you are having connectivity problems. To check the routing table, use the show ip
route command, as demonstrated in Example 8-11.
Example 8-10 Verifying IP Address??“to??“DLCI Mappings and Static or Dynamic Con?¬?guration
RouterX# sshhooww ffrraammee--rreellaayy mmaapp
Serial0/0/0 (up): ip 10.140.1.1 dlci 100(0x64,0x1840), dynamic,
broadcast,
CISCO, status defined, active
Troubleshooting Frame Relay WANs 353
Figure 8-34 Troubleshooting End-to-End Connectivity with Frame Relay
If only directly connected routes appear in the routing table, the problem might be that
the Frame Relay network is preventing the routing protocol updates from being
advertised across it. Because of the NBMA nature of Frame Relay, you must con?¬?gure
Example 8-11 Con?¬?rming End-to-End Connectivity
RouterX# sshhooww iipp rroouuttee
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.
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