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a doubt on the hop-limit constraint in draft-ietf-mpls-fastreroute-mib-00.txt

  • From: stefaan.de_cnodder@alcatel.be
  • Date: Thu, 04 Jul 2002 10:45:09 +0200
  • Cc: mpls@UU.NET, Riza CETIN <riza.cetin@alcatel.be>
  • Organization: Alcatel
  • X-MIMETrack: Itemize by SMTP Server on BEMAIL06/BE/ALCATEL(Release 5.0.8 |June 18, 2001) at07/04/2002 10:45:06,Serialize by Router on BEMAIL06/BE/ALCATEL(Release 5.0.8 |June 18, 2001) at07/04/2002 10:45:09,Serialize complete at 07/04/2002 10:45:09


Ling,

The object mplsFrrConstHopLimit is meant to be the same as the hop-limit
defined for the FAST-REROUTE object. Description in the MIB will be
updated in the next version.

thanks for the comment,

Stefaan


Ling Li wrote:
> 
> The hop-limit constraint is defined as follows in
> draft-ietf-mpls-fastreroute-mib-00.txt:
> 
> mplsFrrConstHopLimit OBJECT-TYPE
>                      SYNTAX        INTEGER (1..255)
>                      MAX-ACCESS    read-create
>                      STATUS        current
>                      DESCRIPTION
>                        "The maximum number of hops that the detour LSP may
> traverse."
>                      DEFVAL { 32 }
>                   ::= { mplsFrrConstEntry 10 }
> 
> However, this definition is different from what it is in
> draft-ietf-mpls-rsvp-lsp-fastreroute-00.txt:
>         Hop-limit
> 
>       The maximum number of extra hops the backup path is allowed
>       to take, from current node (a PLR) to a MP, with PLR and MP
>       excluded in counting.  For example, hop-limit of 0 means only
>       direct links between PLR and MP can be considered.
> 
> Can any of the authors clarify this inconsistency? I have raised a closely
> related question
> at http://cell.onecall.net/mhonarc/mpls/2002-Jun/msg00143.html.
> 
> Thanks,
> 
> Ling Li
> 
> Axiowave Networks, Inc.
> 200 Nickerson Road
> Marlborough, MA 01752
> Email: lli@axiowave.com
> ========================