From: SFeldberg@xxxxxxxxxxxxx
Date: Tue Nov 06 2001 - 13:20:59 GMT-3
Search the archives for "Recursive Routing Loops". Tunnel flapping is
caused by one end of the tunnel trying to reach the tunnel destination ip
address through the tunnel itself. Think about it, and you will realize
why that cannot happen and why it causes the tunnel to fail.
You need to disallow your tunnel source/destination IPs from being
advertised by your IGP through the tunnel.
Steve
"Courtney
Foster" To: <ccielab@groupstudy.com>
<cfoster@cnr. cc:
edu> Subject: Flapping Tunnel Interface
Sent by:
nobody@groups
tudy.com
11/06/2001
11:03 AM
Please
respond to
"Courtney
Foster"
Hello,
Has anyone ever encountered a problem with flapping Tunnel
interfaces.
I configured a GRE/IP tunnel over the internet...One side of the tunnel
showed UP/UP always...the other side of the tunnel showed UP/UP for 20
seconds...then shows UP/DOWN for a couple of minutes...then goes UP/UP
for 20 seconds...
Please give me some feed back on this...also...does anyone know of a way
to disable keepalives on a Tunnel interface...
Courtney Foster
Sr. Network Engineer
x5910
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