Description

We have seen many VPLS connections went down with the state : deleted.

Please help to explain why the vpls connection went down with the state deleted.

Symptoms

Jul 12 23:42:04.562 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.b.c.d, VC-ID : 62000) changed from UP to VC-Dn

Jul 12 23:42:04.562 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.b.c.d, VC-ID : 62002) changed from UP to VC-Dn

Jul 13 03:14:02.409 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.b.c.d, VC-ID : 62002) changed from UP to VC-Dn

Jul 13 03:14:02.409 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.b.c.d, VC-ID : 62000) changed from UP to VC-Dn

Jul 14 11:57:07.961 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.x.y.z, VC-ID : 61333) changed from UP to DELETED

Jul 14 11:57:07.965 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.x.y.z, VC-ID : 61316) changed from UP to DELETED

Jul 14 11:57:07.965 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.x.y.z, VC-ID : 61203) changed from UP to DELETED

Jul 14 11:57:07.965 JTAC rpd[32754]: RPD_LAYER2_VC_DOWN: State of Layer 2 VC (Neighbor : a.x.y.z, VC-ID : 61379) changed from UP to DELETED

Solution

The DELETED state in an L2 Virtual Circuit (VC) context typically refers to a condition where the virtual circuit has been explicitly removed or is no longer active in the Layer 2 (L2) networking configuration.

The specifics of this state can vary depending on the protocol or technology in use.

The VC does not exist in the system’s configuration & hence it goes as deleted.

 

But if the l2circuit is configured in the device, the VC will go down as VC-Dn.


1. VC-Dn (Virtual Circuit Down)

Meaning:

  • VC-Dn indicates that the virtual circuit exists in the configuration but is currently non-operational or inactive.
  • The VC is unable to pass traffic due to an issue or missing resources.

 

2. DELETED

Meaning:

  • The DELETED state indicates that the virtual circuit has been removed from the configuration or explicitly terminated.
  • The VC no longer exists in the system.

Characteristics:

  • The VC does not exist in the system’s configuration.


Modification History

2025-01-21 : Article Created