From: Ronnie Angello (ronnie.angello@gmail.com)
Date: Mon Apr 23 2007 - 21:04:39 ART
I believe that it's just an indication that load balancing is occurring (RDB
is alternating paths). As long as routes aren't being deleted and re-added
it is not a problem.
Ronnie
On 4/23/07, CCIEwnaB <cciewnab@gmail.com> wrote:
>
> So no repsonses on this. Is that because you're trying to reproduce
> it...or
> is this shocked amazement at yet another long question with an obvious
> answer?
>
> If it's the later, please enlighten me ;)
>
> ---------- Forwarded message ----------
> From: CCIEwnaB <cciewnab@gmail.com>
> Date: Apr 21, 2007 5:49 PM
> Subject: Question about debug ip route output
> To: Cisco certification <ccielab@groupstudy.com>
>
> Smart peeps,
>
> Like many others on GS I have gotten in the habit of using "debug ip
> routing"
> through most of the lab. I like that I get instant feedback if I
> accidently
> kill a route or two, and enjoy seeing them pop in when adding a network
> statement or redistribution. That being said I have noticed something in
> many labs related to OSPF load balancing and just want to be sure I'm not
> habitually screwing something up.
>
> When I have two paths to the same destination and am equal cost load
> balancing to that destination, I've noticed that any time I have traffic
> running (ping for example) across the load balanced link (with debug ip
> routing enabled) I see a message noting an RDB change from Path A to Path
> B.
> If I ping again it swaps from B to A.
>
> When I do a show ip route 1.2.3.4 I see that I'm load balancing on 2 paths
> with a traffic share count of 1 on each path, which makes sense.
>
> I guess I just want to be sure this output is normal and that I haven't
> missed anything. It's especially abnoxious when a BGP peering session is
> running acros the load balanced path. The TCP session results in a steady
> stream of these messages.
>
> Thanks in advance,
> wnaB
>
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