Subject: Changing router name...

From: "[email-masked]" <[email-masked]>
Date: Mon, 14 Apr 2003 17:44:22 +0200

Hi all,
i'd like to make you a question: 
what problems could be in a network in which there is a router changing its name? I am thinking to a MPLS-TE scenario in which there are RSVP and OSPF and in which i use Explicit Route Objects for Traffic Engineering. 

Since in OSPF the name of each router is the address of the highest interface, is it possible that 
this particular interface goes down? In a router (for example CISCO, JUNIPER, ecc...) could it happen?

If that particular interface (for example x.y.33.1 ) goes down and/or the operating system of the router eliminates it, after some hellos, we have the generation of LSA Update, so all network will know there is a NEW router in the net (for example x.y.22.1)! What can it happen to the LSPs crossing that router and not interested by the interface's failure? 

Infact, we have one ERO (explicit route object) for each LSP crossing the router; in each ERO of the
LSPs not interested by the failure, we have x.y.33.1; after four hellos, the router x.y.33.1 will not exist
more in the net! In the same way if i establish new LSPs, they will have the ERO containing x.y.22.1,
so if the interface becomes active after a certain period, the router will return to the name x.y.33.1 and we' l have the same problem.

Thanks in advance for your kind answers and observations.
Giovanni

Coritel - Rome