The MPLS WG Archive

["Darek Skalecki" <dareks@nortelnetworks.com>]

"Bui, Khanh" wrote:

Hi,

I have a couple of questions on this draft.

1. How should the U and F bits be set in the feedback TLV?
   Should they both be set to 1 so that the message containing
   this TLV will go through any node that doesn't support
   feedback TLV, and eventually will get to the source node?

The idea is that nodes which do not support Feedback TLVs simply pass these
TLVs transparently. This obviously can create discontinuity in the information
that is fed back, i.e. information about some links along the path can
be omitted.

 

2. How should the feedback TLV be handled if the message
   containing this TLV travels from one autonomous system or
   from one IGP area to another?  Should the TLV be filtered
   out at the edge node before entering the other AS or other
   IGP area?

Yes, all the Feedback TLVs present on a message should be dropped when
the message exits AS or IGP area through an edge node.

 

Thanks in advance,
Khanh

-- 
Darek Skalecki
Nortel 
(613) 765-2252