RE: BGP dampening

From: Dave Oakman (doakman@xxxxxxxx)
Date: Fri Aug 27 1999 - 10:00:12 GMT-3


   
It just started working. I let it alone for almost 2 hours and went back and it
 started to work at least on 1 router.
You can test it using the shutdown/no shutdown on th remote router or doing a c
lear ip bgp on the remote router. I was not able to see the flapping increase w
hen I did shut/no shut/shut/no shut. I had to wait until the bgp session was es
tablished before I shut it down again. This isn't the behavior I expected -- oh
 well it works.

time to move on to something else.

ttfn
DaveO

Peter
I am taking my lab next week in Halifax.

Congrats on the written

-----Original Message-----
From: pbosio@comtech.com.au [SMTP:pbosio@comtech.com.au]
Sent: Friday, August 27, 1999 12:04 AM
To: Dave Oakman
Subject: RE: BGP dampening

Dave,

Without really checking it should work regardless of what type of BGP ( except
Internal BGP ) eg mesh, confederations, because in the end its still just a
route.

When are you sitting your lab exam?

I've just did the written 3 days ago and need to start on the lab.

Cheers
Paul

Dave Oakman <doakman@home.com> on 27/08/99 11:29:49 am

To: "'pbosio@comtech.com.au'" <pbosio@comtech.com.au>
cc:

Subject: RE: BGP dampening

Unfortunately, my rack is an hour away.

On CCO they showed an example of doing a clear ip bgp x.x.x.x and it showed up.
(who know what they reaaly did to make that look good).
So I figured that I should be able to simulate the multiple line failures
shut/no shut , but that didn't work either. I guess I will wait till tommorrow
and play with layer 1.

Do you know if bgp dampening applies to BGP confederations? To bgp they behave
like ebgp connections so it should work ?

Thanks
ttfn
daveO

-----Original Message-----
From: pbosio@comtech.com.au [SMTP:pbosio@comtech.com.au]
Sent: Thursday, August 26, 1999 9:10 PM
To: Dave Oakman
Subject: Re: BGP dampening

Dave,

BGP dampening really only works for oscillating routes from EBGP sessions.
Shuting down the serial or ethernet will not simulate an oscillating route.
Maybe you could get a flakey or intermittent UTP cable and try that or do a
"shut" or "no shut" several times really really fast.

Hope this helps, let me know how you go.

Paul

Dave Oakman <doakman@home.com> on 27/08/99 10:04:00 am

Please respond to Dave Oakman <doakman@home.com>

To: "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
cc:

Subject: BGP dampening

Has anyone had luck with BGP dampening? I am attempting a simple config to see
the effects of dampening but am having no luck.

I know that dampening occurs only with ebgp peers so I shutdown the switchport
that is connected to my router simulate an external line failure , but for some
crazy reason the line/protocol on my 4500 stays up (keepalive 10). So I tried i
t
over a serial link did a shut down and showed bgp routes just disappeared with
no dampening or history stats.

Am I just missing something stupid ??

Thanks
TTFN
DaveO
6 days and counting



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