Panasonic NN46240-710 - Manual (Page 93)

3 BGP/MPLS IP VPN troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
Check if the forwarding entry is correct on PE. Use the display fib vpn-instance
vpn-instance-name command to view the forwarding information base (FIB) of the VPN on the
Main Processing Unit (MPU).
For example:
<Nortel> display fib vpn-instance vpna
Destination/Mask Nexthop Flag TimeStamp Interface
202.2.4.1/32 127.0.0.1 HU t[172572] InLoopO
202.2.4.0/24 202.2.4.1 U t[172572] GE4/0/0
TunnellD
0x6002000
0x6002000
CD NOTE
You can view the Tunnel ID by using the display tunnel-info command.
If the FIB entry exists only on the main control board but not the interface board, it indicates
that IPC messages may be lost. In such scenarios, contact Nortel technical personnel.
—End
3.3 Troubleshooting cases
This section covers the following topics:
PE fails to send private network routes to the remote CE
CEs cannot communicate
Failure to ping large packets of the private network
PE cannot ping through the remote CE network segment
Failure to establish the MP-EBGP peer in inter-AS VPN-OptionC
3.3.1 PE fails to send private network routes to the remote CE
Fault symptom
Figure 3-5 Networking diagram
Loopack 0
1.1.1.1/32
GbE2/0/0
10.1.1.102/24
GbE1/0/0
10.1.1.101/24„
Loopack 0
2.2.2.2/32
Loopack 0
3.3.3.3/32
GbE1/0/0
102.1.1.2/2
GbE1/0/0
p
E1
102.1.1.1/24
p
GbE1/0/0
203.1.1.2 /24
GbE2/0/0
10.2.1.202/24
GbE2/0/0
203.1.1.1 /24
P
E^ X. GbE1/0/0
10.2.1.201/24
CE2
vpna
Sitel vpna
Site2
In Figure 3-5, the following solution is adopted:
• EBGP runs between PE and CE.
• An IBGP adjacency establishes between PE1 and PE2 to transfer VPNv4 routing
information that contains inner labels.
3-14 Nortel Networks Inc. Issue 5.3 (30 March2009)