Re: Loop Prevention MPLS VPN

Thanks Paul, Vivek and "M e?" for posting the question and responses.

I see yes, the external route tag is set (this was a type-5 LSA).

  Routing Bit Set on this LSA
  LS age: 1327
  Options: (No TOS-capability, DC)
  LS Type: AS External Link
  Link State ID: 100.0.0.0 (External Network Number )
  Advertising Router: 56.0.0.5
  LS Seq Number: 80000017
  Checksum: 0x17AF
  Length: 36
  Network Mask: /8
        Metric Type: 2 (Larger than any link state path)
        TOS: 0
        Metric: 1
        Forward Address: 0.0.0.0
       * External Route Tag: 3489661028*

I also see the routing bit for type-3

                Summary Net Link States (Area 0)

* Routing Bit Set on this LSA*
  LS age: 1712
  Options: (No TOS-capability, DC, Downward)
  LS Type: Summary Links(Network)
  Link State ID: 1.1.1.1 (summary Network Number)
  Advertising Router: 56.0.0.5
  LS Seq Number: 8000001A
  Checksum: 0x160B
  Length: 28
  Network Mask: /32
        TOS: 0 Metric: 65

One more notch of confusion cleared up - one more millimeter towards CCIE
:-)

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Received on Wed Dec 01 2010 - 13:58:33 ART