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Re: MPLS Hierarchy

  • From: Muhammad Tahir <muhammadtahir2000@yahoo.com>
  • Date: Mon, 7 Feb 2005 05:44:55 -0800 (PST)
  • Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys
  • DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=rbgZPG1+IBAd6cTwBY/FLarFQfzmqvA07aJggT5cQ6UTMokVWYnfamJAeZANFj64x1uVfMEPSsI3CMYzewp96y/YttUhDKtQpEPC/wWUHFqE8IDYc0VFBmUqypliIXfIIB52CpOWZQDbfMGK9MYeve2b89TzWWrURT7AXD18RQ8= ;
  • Resent-Date: Mon, 7 Feb 2005 09:24:38 -0500
  • X-Scanned-By: MIMEDefang 2.45
  • X-SpamProbe: GOOD 0.0000000 12a2fe8730dcf74a844e8e91a60ba3e1

According to figure: (what I understand is)

There will be only TWO labels in a label stack at one time, one for IGP: to travel the
packet within the domain and the second for BGP label at the boundary of the domain to
transfer the packet towards next domain. 

(BUT, according to RFC 3031(section 3.27.3), if there are two or more tunnels in ONE
domain, then there will be 3 or more labels in one label stack at the inner most tunnel.)

so for me this is a little bit confusing!!!!

Tahir



--- Puddinhead Wilson <puddinghead_wilson007@yahoo.co.uk> wrote:

>  
> > Hi,
> > please clear the situation:
> > 
> > reference:(framework for mpls, draft, page 51)
> >
> http://www.ietf.org/internet-drafts/draft-ietf-mpls-framework-05.txt
> > 
> > 1:
> > Is it necessary that we MUST make level only at
> > IGP(OSPF etc) and BGP based?
> > It means that there will be ONLY two levels in each
> > domain???
> 
> If you just run BGP all over, there is just one level
> :)
> 
> 
> > If yes, then there will be only two labels in each
> > domain (at maximum) one is OSPF label and other will
> > be BGP label??
> 
> What BGP label are you referring to?
> 
> 
> 
> 
> 
> 	
> 	
> 		
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