Panasonic NN46240-710 - Manual (Page 154)

4 MPLS L2VPN troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
For a VLANIF interface, the VLAN packet does not carry a VLAN tag by default. If PWE3 is
configured in tag mode, the forwarding engine adds a default VLAN tag to packets. The main
Ethernet interface can emulate the default VLAN and make packets be in default VLAN mode.
Therefore, when you configure PWE3 on the interface of Ethernet type, you can configure the
packet to be tagged or untagged manually instead of judging from the interface type.
Q: After CEs adopt the ATM to access PEs, all the CE interfaces and PE interfaces
are up. Why can the CEs on two ends not ping through each other?
A: Check and ensure the PVC of the interface that connects with CE on the PE, and that of the
interface that connects with PE on the CE are consistent.
4.5 Diagnostic tools
4.5.1 display commands
Command Description
display mpls l2vc Displays information about Layer 2 VC.
display tunnel-info Displays information about tunnels.
display mpls lsp Displays information about LSPs.
display mpls ldp Displays information about LDP.
display mpls Layer 2 VPN
connection Displays information about the Layer 2 VPN using
BGP as the signaling.
display mpls Layer 2 VPN Displays the MPLS Layer 2 VPN information.
display mpls l2vc
# View information on the bound Layer 2 VC of a specified interface:
<Nortel> display mpls l2vc interface ethernet1/0/0
Client Interface Ethernet1/0/0 is up
Session State up
AC State up
VC State up
VC ID 10
VC Type ethernet
Destination 2.2.2.2
Local Group ID 0
Remote Group ID 0
Local VC Label 17408
Remote VC Label 17408
Local VC MTU 1500
Remote VC MTU 1500
Local VCCV Disable
Remote VCCV Disable
4-44 Nortel Networks Inc. Issue 5.3 (30 March2009)