[AusNOG] Cisco LNS - dataplane errors

Joseph Goldman joe at apcs.com.au
Wed Aug 10 13:01:13 EST 2016


Hi John,

  It was initially set much higher than the subscriber count, we also 
removed it completely and to no help - we have since rebooted the router 
which seems to have fixed it but it has now stalled twice since that 
reboot so thinking quite likely faulty hardware, we are in the process 
of cutting over to backup hardware now *sigh* thanks for the look-in though.

Thanks,

Joe

On 10/08/16 12:55, John Edwards wrote:
> Hi Joseph,
>
> Have you tried setting the vpdn "session-limit" value to a number 
> larger than the count of subscribers you're seeing?
>
> John
>
>
> On 10 August 2016 at 11:35, Joseph Goldman <joe at apcs.com.au 
> <mailto:joe at apcs.com.au>> wrote:
>
>     Hi All,
>
>      Cisco 7204-G2, running as an LNS.
>
>      Has anyone ever come across this error:
>
>     .Aug 10 01:58:39: VPDN uid:2171 Error setting up dataplane; set
>     app req
>
>      Basically the router accepts sessions up to what seems a certain
>     subscriber count then once that number is online starts generating
>     these errors.
>
>      At best guess it is a full, finite resource. The number of
>     allowed subscribers is slowly reducing, what I don't know is if
>     this is due to bad garbage collection so to speak (i.e. 'stuck'
>     sessions in the dataplane, that dont show in 'show users') or if
>     the dataplane itself is actually dying/dead. If we kick a user
>     offline or clear tunnels cleanly - users will re-connect back up
>     to that number of subscribers (first in best dressed), which is
>     what sparked this line of thinking.
>
>      Anyone who has experienced similar or knows this a bit more
>     in-depth, your help would be appreciated, as its got me scratching
>     my head so far.
>
>     Thanks,
>     Joe
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