Hi Russ,
Regarding your topology:
( )
/-------( AS2 )--------\
( ) / ( ) \ ( ) ( )
( AS1 ) ( AS4 )-----( AS5 )
( ) \ ( ) / ( ) ( )
\-------( AS3 )--------/
( )
o AS1 is advertising 192.0.2.128/25 to both AS2 and AS3.
o AS2 is advertising both 192.0.2.128/25 and 192.0.2.0/24 into AS4.
o AS3 is advertising 192.0.2.128/25 into AS4
I am afraid you are too optimistic :)
The most common scenario I see is that AS2 only advertises to AS4 the
aggregate so 192.0.2.0/24. That means that your 192.0.2.128/25 would
never get "BOUNDED" status hence the other path via AS3 will continue
worldwide via AS4.
Contrary as you very well know the alternative proposal
http://tools.ietf.org/id/draft-marques-idr-aggregate-00.txt seems to
address the above case as well as all cases you are trying to cover.
Could you comment and compare both solutions especially as a (co-)author
of both ;).
Best,
R.
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