From: Piotr Ojczyk (pojczyk@tlen.pl)
Date: Thu Mar 08 2007 - 11:43:28 ART
I found the solution - forget about keepalives ;)
Tunnels can be also divided into groups with different keepalives. Each
group should then have, for example, 1 second longer keepalive interval. Of
course groups are imaginary, not configured. However this solution is very
stilted, much better will be if Cisco allows to set this parameter manually.
Regards
Piotr Ojczyk
----- Original Message -----
From: "Sergey Golovanov" <sergey.golovanov@iementor.com>
To: "Piotr Ojczyk" <pojczyk@tlen.pl>; <ccielab@groupstudy.com>
Sent: Thursday, March 08, 2007 12:24 AM
Subject: Re: Tunnel keepalives
>
> I've been bugging TAC about this few times already. A 37xx router with
> more than 200 gre tunnels running with keepalives turned on will cause its
> CPU to go 100%. If you find a solution, let me know please :)
>
>
> --------------------------------------------------------------------
> Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service Provider/Storage)
> "Please, don't ask me for my ccie #, there are reasons why I can't release
> it"
> ieMentor Instructor and Content Developer
> sergey.golovanov@iementor.com
> http://www.iementor.com
>
>
>> -------Original Message-------
>> From: Piotr Ojczyk <pojczyk@tlen.pl>
>> Subject: Tunnel keepalives
>> Sent: Mar 07 '07 17:44
>>
>> Hello,
>>
>> When there are a few tunnels configured with the same time interval, the
>> keepalives are sent simultaneously for all the interfaces. It causes
>> quite
>> inconvenient situation when very big number of tunnels is used - a storm
>> of
>> keepalives is then generated followed by the long idle time. Especially
>> when
>> all the responding routers are connected to a multi-access network and
>> try
>> to reply immediately causing collisions.
>>
>> Is there any possibility to spread tunnel keepalives to be sent in
>> different
>> time?
>>
>> Thanks
>> Piotr
>>
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