[cisco-bba] L2TP sessions on 7200

[Vincent Fayet (vfayet)]

Not only the number of session and the dis/connection is important but
also the rate (pps) per active session is quite important.

I imagine you have already checked any issue regarding fragmentation and
probably you already use the adjust-mss feature.

Cheers

Vincent

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Vincent Fayet
Systems Engineer
Cisco Systems
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> -----Original Message-----
> From: sthaug at nethelp.no [mailto:sthaug at nethelp.no] 
> Sent: vendredi 25 juillet 2003 13:20
> To: achatz at forthnet.gr
> Cc: cisco-bba at puck.nether.net
> Subject: Re: [cisco-bba] L2TP sessions on 7200
> 
> 
> > I have read a lot of conversations about 7200 and the max 
> number of l2tp sessions it can 
> > support, but all the answers are making me think that there 
> is something wrong with my 
> > case. My router doesn't even seem capable of reaching 1000 sessions.
> > 
> > I have a 7206 (NPE-300) and with 550 sessions it reaches 
> 50% - 60% cpu load.
> > Is there anything i can do in order to decrease it?
> > "ip cef" doesn't seem to do anything...
> 
> We found when doing L2TP termination that there's a big difference
> between the number of L2TP sessions you can handle in the 
> steady state,
> and the number you can handle when you have a lot of signaling (L2TP
> sessions going up & down). The signaling traffic seems to 
> chew up a lot
> of CPU.
> 
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
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