[cisco-bba] 'sessions' versus 'PPPoA/E sessions' counts

[ahmad fadly]

I seem too many pending and fail number of sessions. If you see your cpu proc is to high and your box is overly busy, try to use CAC (call admission control). It works to prevent overloading cpu and protect the router resources. 

You can use sh call admission statistics to see the CAC statistic
C10K#sh call admission statistics 
Cac New Model (SRSM) is ACTIVE
Total call Session charges: 0, limit 90
Total calls rejected 1669, accepted 340854
Reject reason: CPU-limit: 1669 SessionCharges 0
Current actual CPU: 14%, Limit: 90%
Hardware CAC is currently not active

-----
Fadly

> Date: Thu, 04 Jun 2009 16:11:51 +0300
> From: Tassos Chatzithomaoglou <achatz at forthnet.gr>
> To: cisco-bba at puck.nether.net
> Subject: Re: [cisco-bba] 'sessions' versus 'PPPoA/E
> sessions' counts
> 
> Number of sessions currently up + Number of sessions
> currently pending = PPPoA + PPPoE
> 
> PPPoA or PPPoE doesn't take into account whether the
> sessions have finished their negotiation.
> 
> --
> Tassos
> 
> Frank Bulk wrote on 04/06/2009 13:22:
> > When I looked at my "sh subscriber statistics" I
> noticed that 
> > - my "sessions currently up" does not add up to the
> number of PPPoA and
> > PPPoE sessions: how can that be?
> > - I have a very high "Number of sessions failed to
> come up"
> > - my call rate is 3341/minute, which is 56/second
> > 
> > I know I have lots of provisioned VP/VCs that don't
> have an active DSLAM
> > port, but I'm not sure if that contributes to an
> explanation.
> > 
> > If there's a debug I need to turn on to "see", please
> suggest the
> > appropriate one.  It seems that the box is overly
> busy.
> > 
> > Frank
> > 
> >
> ==================================================================
> > Router#sh subscriber statistics
> > 
> > Current Subscriber Statistics:
> > 
> > Number of sessions currently up: 2596
> > Number of sessions currently pending: 1327
> > Number of sessions currently authenticated: 2596
> > Number of sessions currently unauthenticated: 1327
> > Highest number of sessions ever up at one time: 2647
> > Mean up-time duration of sessions: 00:01:08
> > Total number of sessions up so far: 543761664
> > Mean call rate per minute: 3341, per hour: 200502
> > Number of sessions failed to come up: 543534572
> > Access type based session count:
> > PPPoA sessions = 3711
> > PPPoE sessions = 212
> > 



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