Panasonic NN46240-710 - Manual (Page 140)

4 MPLS L2VPN troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
Session State
AC Status
VC State
VC ID
VC Type
Destination
Local VC Label
Remote VC Label
Control Word
Local VC MTU
Remote VC MTU
Tunnel Policy Name
Traffic Behavior Name
PW Template Name
Create time
UP time
Last change time
up
up
down
100
ethernet
2.2.2.2
119808
25600
Disable
80
120
0 days, 0 hours, 0 minutes, 4 seconds
0 days, 0 hours, 0 minutes, 0 seconds
0 days, 0 hours, 0 minutes, 4 seconds
# View the MTU value of the Ethernet interface on PE2:
[PE2-Ethernet1/0/0
Total ldp vc : 1
*Client Interface
Session State
AC Status
VC State
VC ID
VC Type
Destination
Local VC Label
Remote VC Label
Control Word
Local VC MTU
Remote VC MTU
Tunnel Policy Name
Traffic Behavior Name
PW Template Name
Create time
UP time
Last change time
display mpls l2vc 100
0 up 1 down
Ethernet1/0/0
up
up
down
100
ethernet
1.1.1.1
25600
119808
Disable
120
80
0 days, 0 hours, 0 minutes, 14 seconds
0 days, 0 hours, 0 minutes, 0 seconds
0 days, 0 hours, 0 minutes, 14 seconds
The display shows that the MTU value of the local end is not consistent with that of the remote
end, which leads to parameter negotiation failure.
Modify the interface MTU value on either PE to make the MTU value consistent at both ends.
For example, change the MTU value of the interface on PE2 to make it consistent with that on
PE1:
[PE2-Ethernet1/0/0]
[PE2-Ethernet1/0/0]
[PE2-Ethernet1/0/0]
mtu 80
shutdown
undo shutdown
After modification, the VC becomes Up:
[PE2-Ethernet1/0/0]
Total ldp vc : 1
*Client Interface
display mpls l2vc 100
1 up 0 down
: Ethernet1/0/0
4-30 Nortel Networks Inc. Issue 5.3 (30 March2009)