[Isis-wg] Question on TLV type 135

[Prashant Kumar]

I have a question on TLV type 135 in "IS-IS extension for Traffic
Engineering".

under the description it is told that this TLV corrects some 
problems in existing "IP reachability TLV".

But the thing which confuses me is: Is this TLV(type 135) is aimed at
replacing the existing IP Internal reachability TLV(type 128) and IP
External reachability TLV(type 129). If so section 3.10.2 of RFC1195 
"Order of Preference of Routes in the Level 2 routing" does not apply
directly anymore because in TLV type 135 there is no bit to indicate
"internal" and "external" routes. Also, how are we going to distinguish
internal and external reachability.

I assume, extended IP reachability TLV deserves more explanation.

Regards,
-- 
Prashant Kumar
Nortel Networks