Panasonic NN46240-710 - Manual (Page 150)

4 MPLS L2VPN troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
LAM : Label Advertisement Mode SsnAge Unit : DDD:HH:
Fault analysis
Check the routing table on PE-B. The display is as follows:
[PE-B] display ip routing-table
Routing Tables: Public
Destinations : 10 Routes : 10
ati on/Ma sk Proto Pre Cost NextHop Interface
1 .0.0. 0/8 RIP 100 1 100. 1. 1. 1 Pos2/0/0
1 .1.0. 0/16 Direct 0 0 1.1. 2. 3 Pos3/0/0
1 .1.2. 3/32 Direct 0 0 127. 0.0.1 InLoopBack0
1 .1.2. 4/32 Direct 0 0 1.1. 2. 4 Pos3/0/0
2 .2.2. 2/32 Direct 0 0 127. 0.0.1 InLoopBack0
100 .1.1. 0/24 Direct 0 0 100. 1. 1. 2 Pos2/0/0
100 .1.1. 1/32 Direct 0 0 100. 1. 1. 1 Pos2/0/0
100 .1.1. 2/32 Direct 0 0 127. 0.0.1 InLoopBack0
127 .0.0.0/8 Direct 0 0 127. 0.0.1 InLoopBack0
127 .0.0.1/32 Direct 0 0 127. 0.0.1 InLoopBack0
RIP-1 can identify only the route of the natural segment such as Class A, B, and C.
In the routing table of PE-B, two routes to peer 1.1.1.1 exist:
• The IP address 1.0.0.0/8 learned by RIP-1.
• The IP address 1.1.0.0/16 that directly connects with PE-B.
According to the longest matching rule, the packet is sent to POS 3/0/0 whose IP address is
1.1.0.0/16. In the network segment connected with POS 3/0/0, the loopback address 1.1.1.1/32
does not exist. Therefore, the MPLS LDP session cannot be set up.
Troubleshooting procedure
Step 1 Replace RIP-1 with RIP-2 to advertise the 32-bit loopback address. This address serves as the
MPLS LDP session address, on the PE.
—End
Summary
RIP-1 can identify only the route of the natural segment such as Class A, B and C. Use RIP-2 to
advertise the 32-bit loopback address of PE.
4.4 FAQs
Q: How can I run Martini mode on the existent version?
A: The Secure Router 8000 Series defaults to run PWE3 and also supports compatibility with
Martini mode. If the router is required to work only in Martini mode, use the mpls l2vpn
default martini command in the system view.
4-40 Nortel Networks Inc. Issue 5.3 (30 March2009)