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RFC 3107, "Carrying Label Information in BGP-4", May 2001

Note: This RFC has been obsoleted by RFC 8277

Source of RFC: mpls (rtg)

Errata ID: 4498
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Alexander Okonnikov
Date Reported: 2015-10-13
Verifier Name: Deborah Brungard
Date Verified: 2016-02-11

Section 3 says:

   The label(s) specified for a particular route (and associated with
   its address prefix) must be assigned by the LSR which is identified
   by the value of the Next Hop attribute of the route.

   When a BGP speaker redistributes a route, the label(s) assigned to
   that route must not be changed (except by omission), unless the
   speaker changes the value of the Next Hop attribute of the route.

It should say:

   The label(s) specified for a particular route (and associated with
   its address prefix) must be assigned by the LSR which is identified
   by the value of the Network Address of Next Hop field of
   MP_REACH_NLRI attribute of the route.

   When a BGP speaker redistributes a route, the label(s) assigned to
   that route must not be changed (except by omission), unless the
   speaker changes the value of the Network Address of Next Hop field of
   MP_REACH_NLRI attribute of the route.

Notes:

Next Hop address for labeled routes is conveyed within MP_REACH_NLRI attribute.

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