By next-hop IP address I mean "originator IP address" as referred in
Cisco's documentation. I don't know exactly what is the rule to choose
the originator IP address from "IP Interface Address TLV" but it seems
it choses the highest IP address (loopbacks have priority). Beware that
this can be changed on-the-fly; if you configure a Loopback with a
higher IP address and include it in IS-IS the originator IP will change
and the distance command will not work anymore.
From Routing Protocols Command Reference, Release 12.2:
When an IS-IS router advertises its link-state information, it includes
one of its own IP addresses to be used as the originator IP address.
When other routers calculate IP routes, they can store the originator IP
address with each route in the routing table.
Eduard
Blogs and organic groups at http://www.ccie.net
Received on Sun Jan 31 2010 - 12:48:18 ART
This archive was generated by hypermail 2.2.0 : Thu Feb 04 2010 - 20:28:42 ART