The document discusses troubleshooting techniques for Frame Relay WANs. It covers troubleshooting Frame Relay links that are down, connectivity between remote routers, and end-to-end connectivity across the Frame Relay network. The summary emphasizes that there are three aspects of troubleshooting Frame Relay: the link, the mapping between routers, and routing across the network. It recommends using show interface serial, show frame-relay lmi, show frame-relay map, and show frame-relay pvc commands to test layers 1, 2, and connectivity between routers.

1. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-1
LAN Extension into a WAN
Troubleshooting
Frame Relay WANs

2. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-2
Components of Troubleshooting
Frame Relay

3. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-3
Troubleshooting a Frame Relay Link
That Is Down

4. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-4
Troubleshooting Frame Relay Remote
Router Connectivity

5. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-5
Troubleshooting Frame Relay
End-to-End Connectivity

6. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-6
Visual Objective 8-2:
Troubleshooting Frame Relay WANs
WG Router s0/0/0
A 10.140.1.2
B 10.140.2.2
C 10.140.3.2
D 10.140.4.2
E 10.140.5.2
F 10.140.6.2
G 10.140.7.2
H 10.140.8.2

7. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-7
Summary
 There are three aspects of troubleshooting frame relay:
troubleshooting the link, troubleshooting the mapping from one
router to another, and troubleshooting routing across a frame
relay network.
 Use the show interface serial and show frame-relay lmi
commands to verify Layer 1 and Layer 2 link failures. Use the
show frame-relay map and show frame-relay pvc commands
to test connectivity between routers.

8. © 2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.0—8-8