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C

HAPTER

 51: MPLS VLL

Symptom 1: Fail to configure Layer 2 VPN on the VLAN interface.

Solution:

■

Check to see if MPLS/BGP VPN, multicast, or VLL is enabled on the VLAN 
interface. Because you cannot perform Layer 2 VPN configuration on a VLAN 
interface if MPLS/BGP VPN, multicasting, or VLL is enabled on it.

■

Check to see if the VLAN is a Super-Vlan or a Sub-Vlan. You can perform the 
Layer 2 VPN configuration only on common VLAN interfaces.

Symptom 2: Fail to ping the peer from one end of a Martini MPLS L2VPN 
connection. The VC is down and the Remote value is invalid.

Solution:

■

VC state being down indicates the encapsulation types or VC IDs of the two 
ends are not the same. Make sure the interface types (Access or Trunk) of the 
two PE interfaces and the VC IDs of the two ends are consistent.

■

As for the invalid Remote value, make sure you have configured the Remote 
parameters and the peer addresses correctly.

Symptom 3: Fail to ping the peer of a Kompella MPLS L2VPN connection. The 
Connection is down and the VPN value is null.

Solution:

■

VPN value being null indicates the VPN is configured incorrectly. Make sure the 
VPN configurations (such as RD) of the both ends are consistent, and the 
connection configurations of the two CEs on both ends are correct.

Table 567   Display and debug L2VPN

Display information about a 
CCC MPLS L2VPN connection 

display ccc [ ccc-name | type [ local | 
remote ] ] 

You can execute the 
display command in 
any view. 

Display information about a 
Martini MPLS L2VPN 
connection 

display mpls l2vc [ interface 
vlan-interface vlan-id | verbose ]

Display information about a 
Kompella MPLS L2VPN 
connection 

display mpls l2vpn [ vsi-name [ 
local-ce | remote-ce ] | connection [ 
vsi-name [ down | remote-ce | up | 
verbose ] | brief | interface 
Vlan-interface vlan-id ] | 
forwarding-info { vc-label | interface 
interface-type } ]

Display information about the 
system or about Kompella 
MPLS L2VPNs 

Enable debugging for MPLS 
L2VPN 

debugging mpls l2vpn { all | 
loadshare | advertisement | error | 
event | connections [ interface 
vlan-interface vlan-id ] } 

Execute this 
command in user 
view.