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Troubleshooting procedure, Fault description – Nortel Networks 8000 User Manual

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Nortel Secure Router 8000 Series

Configuration -WAN Access

8 Frame relay configuration

Troubleshooting procedure

Do as follows on the routers:

Step 1

Check whether there are routes to the peer by using the

display ip routing-table

command. If

there are no routes to the peer, run the

display this interface

command in the interface view,

and check whether the physical status and the link protocol of the interface are Up.

Step 2

Check the interface status by using the

display this interface

command. If the status of the

interface is Down, reconnect the physical link.

Step 3

Check the link layer protocol by using the

display this interface

command. If the status of

the protocol is Down, run the

link-protocol

command to configure interfaces at both sides

with the same link protocol.

Step 4

Check the status of the tunnel by using the

display interface tunnel

command. If the tunnel

is Down, run the

undo shutdown

command to restart the tunnel. If the link protocol of the

tunnel is Down, the tunnel is not affected.

Step 5

Check whether the DLCIs of tunnel interfaces on two ends are consistent by using the

display

fr switch-table all

command. If the interfaces are not consistent, run the

undo fr switch

command to delete the existing switching PVC, and then run the

fr switch

command and

configure DLCIs of tunnel interfaces on both ends to be consistent.

--- End

8.15.4 Only one end can ping through the other end after
configuring the frame relay PVC

Fault description

As shown in Figure 8-13, you configure Router A and Router B with the FR PVC.

Figure 8-13

Diagram of configuring the FR PVC

RouterA

DLCI=17

DLCI=18

3.1.1.1/24 RouterB

Serial1/0/0.2

^g»

Serial1/0/0

2.2.2.67/24

Serial1/0/0.1

2.2.2.65/24

DLCI=17

The allocation of the IP address and DLCI is as follows:

On Router A, the IP address and DLCI of the father-interface Serial1/0/0 are 2.2.2.67/24

and 17.

On Router B, the IP address and DLCI of the sub-interface Serial1/0/0.1 are 2.2.2.65/24
and 17.

On Router B, the IP address and DLCI of the sub-interface Serial1/0/0.2 are 3.1.1.1/24
and 18.

The configuration file on Router A is as follows:

Issue 5.3 (30 March 2009)

Nortel Networks Inc.

8-75