Subject: Re: MPLS PID

From: George Swallow <[email-masked]>
Date: Tue, 25 Mar 2003 15:49:32 -0500

> I don't see why TDM should be any different from the other PW types,
> and don't see how it obviates the need for IPv4/IPv6/PW identification 
> and can afford to use the first nibble for flags.

Yes, over most existing infrastructure, varying these bits will give
you disordered flows.  I would think that TDM would want to avoid that
like the plague.

Note that setting bit 1 to zero protects you against being
mis-interpreted as IPv4, IPv6, "IPv7".

...George

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