Explicit Route: Format Error Event

LSP Event

Explicit route: format error

Sample Output

user@R1> show mpls lsp extensive
[...Output truncated...]
10.0.0.6
  From: 10.0.0.1, State: Dn, ActiveRoute: 0, LSPname: R1-to-R6
  ActivePath: (none)
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
  Primary   to-R6            State: Dn, No-decrement-ttl
    5 Jan 21 14:37:06 10.1.34.2:  Explicit Route: format error [2 times]
    4 Jan 21 14:37:03 Originate Call
    3 Jan 21 14:37:03 Clear Call
[...Output truncated...]

Meaning

This LSP event indicates an LSP setup failure in which a Path message error in the the ERO was received by a router along the LSP path.

Cause

This LSP event can be caused by several factors:

• An incorrectly formed ERO in the RSVP Path message.
• A strict hop address specified in the middle of an ERO that is not contiguous.
• An unsupported subobject in the ERO of a router along the LSP path.
• The hop indicated by the RSVP hop object does not match the hop indicated by the ERO.

Action

Examine the strict hop address configuration and make any necessary changes.