The MPLS WG Archive

[Bhupesh Bajaj <bhupeshb@in.huawei.com>]

hi...
as specified in RFC 3031..in section 3.14 "scope and uniqueness....."

"A given LSR Rd may bind label L to FEC F1, and distribute that
   binding to label distribution peer Ru1.  Rd may also bind label L to
   FEC F2, and distribute that binding to label distribution peer Ru2.
   IF (AND ONLY IF) RD CAN TELL, WHEN IT RECEIVES A PACKET WHOSE TOP
   LABEL IS L, WHETHER THE LABEL WAS PUT THERE BY RU1 OR BY RU2, THEN
   THE ARCHITECTURE DOES NOT REQUIRE THAT F1 == F2.  In such cases, we
   may say that Rd is using a different "label space" for the labels it
   distributes to Ru1 than for the labels it distributes to Ru2."

it gets clear that the the Rd may specify the same label BUT the label space
used for the Ru1 and Ru2 will be different.

or in other words , if its using Per Platform Label space, the Rd MUST not 
specify the Same Label for different FEC's possibly belonging to different
Ru's.

Correct me If i am wrong

thanks and regards
bhupesh



-----Original Message-----
From: Manoj Dutta [mailto:manoj@ipinfusion.com]
Sent: Monday, May 14, 2001 1:20 PM
To: mpls@UU.NET
Subject: Label Mapping mesage !!


hi,

Is is possible for a given LSR Rd to distribute the same label mapping
for more than one fec elements to another LSR Ru while using platform
wide label space only. If so, then what are the possible scenarios.

thanks
manoj