Technical Summary
Some tLDP applications e.g. remote loop-free alternate (LFA) and
BGP auto discovered pseudowires may establish a tLDP session to any
LSR in a network. The LSR that initializes such a session has
enough information to administratively control initiation of the
session. The targetted LSR normally does not have the information
necessary to control acceptance of the requested session. This
document defines a mechanism to advertise and negotiate Targeted
Applications Capability (TAC) during LDP session initialization.
The targetted LSR is made aware of targeted applications through
the TAC information. When this happens it can establish a limited
number of tLDP sessions for certain applications.
In addition, each targeted application is mapped to LDP Forwarding
Equivalence Class (FEC) Elements to advertise only necessary LDP
FEC-label bindings over the session.
Working Group Summary
The WG process for this document has been fairly normal, and
the working agreed that this is a necessary extension to LDP
for some applications. Discussion has been targeted on resolving
a small number of outstanding issues. The consensus in the working
was good.
Document Quality
We are aware of several intentions to implement this specification.
An implementation poll has been sent to the working group and as
further information is received, the write-up will be updated.
No expert review outside the working group is necessary.
Personnel
Who is the Document Shepherd for this document? Loa Andersson
Who is the Responsible Area Director? Deborah Brungard