Subject: Problems in changing router's name

From: David Hudek <[email-masked]>
Date: Thu, 17 Apr 2003 13:08:12 -0500

>In Rfc2328 chap 5 is said that if the smallest interface
 >(router ID; in ZEBRA i saw that router ID was the HIGHEST
 >interface! Is it possible or am i mistaking?)
 >goes down, router ID changes and OSPF software should be
 >restarted before new router ID takes effect.
 >
 >Again, in draft-katz-yeung-ospf-traffic-09.txt  2.4.1 is
 >said that Router address TLV contains a "stable" IP address
 >of the advertising router that is always reachable!
 >Stable means that IP address router doesn't change?
 >But if i disable the interface that names a Linux router,
 >OSPF could update the topology or could
 >maintain the old router name even if that interface is down.

I believe that the note in chapter 5 of rfc2328 only
mentions a "possible implementation strategy", not a
mandatory one, and not necessarily the best for all
circumstances. In any event, router ID flapping is not
a "good thing" and you might want to use a strategy that
avoids unwarranted changes.

dave hudek
[email-masked]