RFC Errata
RFC 3107, "Carrying Label Information in BGP-4", May 2001
Note: This RFC has been obsoleted by RFC 8277
Note: This RFC has been updated by RFC 6790
Source of RFC: mpls (rtg)See Also: RFC 3107 w/ inline errata
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.