Panasonic NN46240-710 - Manual (Page 145)

Nortel Secure Router 8000 Series
Troubleshooting - VPN___________ 4 MPLS L2VPN troubleshooting
4.3.9 CEs cannot communicate by using the accessing mode of
VLAN
Fault symptom
CEs adopt the accessing mode of VLAN. After the VLAN ID is changed, CEs on two ends
cannot communicate.
Fault analysis
To modify the VLAN ID, you need to modify VC IDs of the AC interfaces along the
packet-sending direction in turn. To make sure the modification takes effect, run the shutdown
command and then the undo shutdown command on each VLAN interface.
Troubleshooting procedure
Step 1 Use the vlan-type command on the AC interfaces along CE to PE and PE to CE direction to
modify the VLAN ID.
Step 2 Use the shutdown command on the AC interfaces to disable the interfaces.
Step 3 Use the undo shutdown command on the interfaces to enable them.
—End
Summary
When the VLAN access is adopted between CE and PE, the minimum VLAN ID of interfaces
on both ends of the AC that the packet passes by must be consistent. Otherwise, the packet
cannot be forwarded normally.
The minimum VLAN IDs of the CE interfaces on both ends of the tunnel can be different.
4.3.10 CEs cannot access each other though the static VC is up
Fault symptom
After the static VC is configured, the static VC is Up. CEs, however, cannot access each other.
For example:
[PE1] display mpls static-l2vc
Total svc connections: 1, 1 up, 0 down
*Client Interface
AC Status
VC State
VC ID
VC Type
Destination
Transmit VC Label
Receive VC Label
Control Word
VCCV Capability
Ethernet2/0/1 is up
up
up
0
ethernet
2.2.2.2
200
100
Disable
Disable
Issue 5.3 (30 March 2009) Nortel Networks Inc. 4-35