MPLS label allocation failure

I was playing with a test MPLS network today and I saw that my LSP isn’t UP.  When I checked with the show mpls command , I have seen the following “MPLS label allocation failure” message.
Then I checked the 192.168.23.1 router to troubleshoot the issue. The issue was again I forgot to enable mpls at interface level.

root@jgw31>show mpls lsp extensive ingress 
Ingress LSP: 1 sessions

10.1.1.8
  From: 10.1.1.5, State: Dn, ActiveRoute: 0, LSPname: j31-to-j40
  ActivePath: (none)
  LSPtype: Static Configured
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
  Primary   path2-j40        State: Dn
    Priorities: 7 0
    SmartOptimizeTimer: 180
    2 May 12 11:12:06.202 192.168.23.1: MPLS label allocation failure[8 times]
    1 May 12 11:08:50.514 Originate Call
  Created: Sun May 12 11:08:50 2013
Total 1 displayed, Up 0, Down 1

 

Once I added the “family mpls” to the interfaces, all started working fine. Then I enforced some path for my LSP and then I got the following “No route toward dest” error.

root@jgw31> show mpls lsp ingress extensive    
Ingress LSP: 1 sessions

10.1.1.8
  From: 10.1.1.5, State: Dn, ActiveRoute: 0, LSPname: j31-to-j40
  ActivePath: (none)
  LSPtype: Static Configured
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
  Primary                    State: Dn
    Priorities: 7 0
    SmartOptimizeTimer: 180
    8 May 12 11:31:07.351 192.168.24.1: No Route toward dest[8 times]
    7 May 12 11:19:42.230 Deselected as active
    6 May 12 11:19:42.227 ResvTear received
    5 May 12 11:19:42.227 192.168.24.2: Down
    4 May 12 11:16:53.054 Selected as active path
    3 May 12 11:16:53.053 Record Route:  192.168.24.1 10.194.194.1 25.1.2.2
    2 May 12 11:16:53.053 Up
    1 May 12 11:16:53.017 Originate Call
  Created: Sun May 12 11:16:52 2013
Total 1 displayed, Up 0, Down 1

This time error was the missing mpls family on the exit interface of 192.168.24.1 device. Again it worked when I fixed this error. It seems I need some time on this topic:)

 

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About: rtoodtoo

Worked for more than 10 years as a Network/Support Engineer and also interested in Python, Linux, Security and SD-WAN, currently living in the Netherlands and works as a Network Support Engineer. // JNCIE-SEC #223 / RHCE / PCNSE


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