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Re: IGP-LDP interaction

  • From: Eric Osborne <eosborne@cisco.com>
  • Date: Thu, 22 Jan 2004 07:05:19 -0500
  • Cc: mpls-ops@mplsrc.com
  • Resent-Date: Thu, 22 Jan 2004 07:25:43 -0500
  • To: Harpreet Singh <harpreet_singh_2000@yahoo.com>
  • User-Agent: Mutt/1.2.5i
  • X-GPG-Fingerprint: 6412 0836 E440 B3EA 980C 4951 611E 1819 2E71 8562

On Thu, Jan 22, 2004 at 02:32:15AM -0800, Harpreet Singh wrote:
> 
> Can anyone tell me/ refer me to some good pointers on
> how OSPF interacts with LDP? 

They don't really interact, they're two different protocols.

> Specifically in JUNOS, the rouyter does not distribute labels to its
> LDP neighbors for prefixes that it odes not have in its IGP although
> it recieved a downstream label for it from another neighbor. Is
> there some standard for this?

IOS works the same way.  The idea with LDP (in non-Martini mode,
anyways) is that it distributes labels for routes it has in its IGP
routing table.  LDP is not a routing protocol, and does not give out
reachability information that routing does not also give out.



eric

> 
> Thanks in advance.
> HS
> 
> 
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