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How to get ASBR information
Manual configuration problems
Scalability and efficiency issues.
Since there is no notification if an inter-AS link is down, path computation through this link would be wrong.

Our proposal in this I-D
IBGP connection may be needed between PCE and ASBR.
A new NLRI is defined to convey this information.
Notification is generated automatically when
A new connection is established, or
An inter-AS link is down.
PPT Version