The MPLS WG Archive

[George Swallow <swallow@cisco.com>]

> 	I don't disagree with your points with one caveat:
> if a new specification requires implementations to support 
> multiple approaches for interoperability with existing
> implementations, it will effectively encourage multiple
> approaches in all future implementations.  I assume you 
> would not argue that the specification should require 
> implementations to discriminate between existing and new 
> implementations by requiring newer implementations to
> support fewer options.

As far as I know, all implementations deal with changing the LSP-ID at
the midpoint.  At the head-end all change the LSP-ID on increase.
Some change the LSP-ID on decrease and some (one?) don't.  If that one
did then we'd all be in sync.

...George

==================================================================
George Swallow       Cisco Systems                  (978) 497-8143
                     250 Apollo Drive
                     Chelmsford, Ma 01824