OSPF DR advertisement question...

From: Tony Paterra (apaterra@gmail.com)
Date: Wed Sep 27 2006 - 21:00:45 ART


Hey all, something I just noticed with broadcast networks in OSPF,
curious if someone can confirm my rationale here...

If I have 2 routers R3 and R4 in the same area (we'll call it area 2)
connected to an ethernet segment and R4 is the DR... Now if we have
R5 in the same area (but not on the ethernet segment), R5 will receive
the route to the ethernet segment from the DR (R4) only. I'm looking
at this for purposes of filtering...

R3 <-Eth--> R4 (DR)
  \ /
    \ /
        R5

So if I didn't want to use bandwidth or cost to influence the traffic,
what Router ID would I filter when I configure it on R5? R4's
loopback or R3's?

Also, under the "show ip ospf database" command, what does Link ID
stand for? From the docs it looks like a network number, but for the
router LSA's it looks like a description of a router.

Thanks!

-- 
Tony Paterra
apaterra@gmail.com


This archive was generated by hypermail 2.1.4 : Sun Oct 01 2006 - 16:55:41 ART