From: fwells12 (fwells12@xxxxxxxxxxx)
Date: Sat Feb 03 2001 - 18:05:20 GMT-3
If your using a known stable version of IOS, your problem is configuration
oversight. If you have everything configured correctly routes will not fade
in and out. Routes fading in and out suggest a routing loop of sorts.
Let us know what you find.
----- Original Message -----
From: Chuck Larrieu <chuck@cl.cncdsl.com>
To: CCIE_Lab Groupstudy List <ccielab@groupstudy.com>
Sent: Saturday, February 03, 2001 12:31 PM
Subject: Artifact - when routes appear and disappear - any thoughts?
> Have you ever experienced this one:
>
> Complex scenarios, multiple routing protocols, complex redistribution. You
> ping from place to place and you are successful. Or maybe partially
> successful ( .!!!. for example )
>
> So you troubleshoot. And in the course of troubleshooting, you do some
more
> tests, and your tests are successful, or sometime unsuccessful. You check
> your configurations, your redistribute statements, your route-maps. Things
> appear to be what they should be. Test some more. Failure test some more
> from different places. Routes are here but not there.
>
> My long winded way of getting around to a phenomenon I am calling
> "artifact" - where something seems to be wrong in a routing table or two
as
> a result of the long history of changes being made. This is particularly
> evident, it seems, in protocols such as OSPF and EIGRP, where only changes
> are propagated. Something as simple as a clear ip route * on a particular
> router ends the problem.
>
> So my question to the group: how do you deal with "artifact"? For those
who
> have been through the lab, or through ECP1 or ASET, what is your advice
> about this kind of concern? What have your mentors suggested as a
practice?
> Do you make it a habit to issue "clear ip route * " and "clear ip cache"
> after making routing related changes, no matter how minor?
>
>
> Chuck
> 63 days and counting
>
> A long shot at passing is better than no shot.
> Right now that's all I got to get me through,
> So I gotta believe!
>
> ( paraphrased from Kathy Baille / Baille and the Boys
> a song from several years ago )
>
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