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Re: does GSR support PE

  • From: Eric Osborne <eosborne@cisco.com>
  • Date: Wed, 22 Nov 2000 18:37:27 -0500
  • Cc: HANSEN CHAN <hansen.chan@alcatel.com>, Chris Dixon <chris.dixon@invocom.com>, kevin Young <kvyoung@21cn.com>, cisco-nsp@puck.nether.net, mpls-ops@mplsrc.com
  • Resent-Date: Wed, 22 Nov 2000 19:34:41 -0500
  • To: Darryl Wortham <dwortham@cisco.com>
  • User-Agent: Mutt/1.2i
  • X-GPG-Fingerprint: 6412 0836 E440 B3EA 980C 4951 611E 1819 2E71 8562


>   Hi,
>   If one use that release (12.0(10)ST) as a PE router, and I have a core LSR
> running LDP, can the GSR router use LDP? Or it is still using TDP?
> 


12.0(10)ST, if you have it, runs LDP.  But if you have it, you
probably knew that already. :)

A cisco router which speaks LDP can also speak TDP.  So yes, if you
have some boxes running TDP and some running LDP, you can interoperate 
by configuing one, or the other, or both, on a per-inteface basis:

gsr11(config-if)#mpls label protocol ?
  both  Use LDP or TDP (Adapt to peer on multiaccess interface)
  ldp   Use LDP
  tdp   Use TDP (default)

If you configure 'mpls label protocol both', the bias is towards LDP.

Until you get 12.0(10)ST or 12.2(x)T (where x is probably 1 or 2), you 
can't run LDP at all.




eric

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