[cisco-bba] strange dsl/pppoa disconnect

[Dennis Peng]

In 12.2(13)T and later, LCP renegotation was not being handled for
VPDN sessions. So like the case below, if we receive a LCP CONFREQ for
a sessions which is already up, that triggers a renegotiation and the
session would be dropped. The user should come back up on a different
VPDN session, but we recently fixed this so the user would renegotiate
without the VPDN session dropping and coming back up. The DDTS is
CSCeb30098 and it should be fixed in 12.2(3).

Dennis

Anastassios Chatzithomaoglou [achatz at forthnet.gr] wrote:
> The following are some debug logs from a dsl customer getting strange 
> disconnects.
> 
> Although the acct record shows "lost-carrier" which i suppose means 
> telco/copper problem, i still can't understand the first line which shows a 
> LCP incoming packet.
> 
> Any idea what might be happening?
> 
> Jun 30 01:00:20.893: Vi17 LCP: I CONFREQ [Open] id 1 len 4
> Jun 30 01:00:20.893: Vi17 PPP: Terminating bound session
> Jun 30 01:00:20.893: Vi17 PPP: Sending Acct Event[Reneg] id[AF3]
> Jun 30 01:00:20.893: Vi17 IPCP: Remove link info for cef entry x.x.x.x
> Jun 30 01:00:20.893: Vi17 IPCP: State is Closed
> Jun 30 01:00:20.897: Vi17 PPP: Phase is TERMINATING
> Jun 30 01:00:20.897: Vi17 LCP: State is Closed
> Jun 30 01:00:20.897: Vi17 PPP: Phase is DOWN
> Jun 30 01:00:20.897: RADIUS(00000AF3): Using existing nas_port 865
> Jun 30 01:00:20.897: RADIUS(00000AF3): Config NAS IP: x.x.x.x
> Jun 30 01:00:20.897: RADIUS(00000AF3): sending
> Jun 30 01:00:20.897: Vi17 IPCP: Remove route to x.x.x.x
> Jun 30 01:00:20.897: Vi17 VPDN: Reseting interface
> ..
> ...
> Jun 30 01:00:20.897: RADIUS:  Vendor, Cisco       [26]  35
> Jun 30 01:00:20.897: RADIUS:   Cisco AVpair       [1]   29  
> "connect-progress=LAN Ses Up"
> Jun 30 01:00:20.897: RADIUS:  Acct-Terminate-Cause[49]  6   lost-carrier    
> [2]
> Jun 30 01:00:20.897: RADIUS:  Vendor, Cisco       [26]  35
> Jun 30 01:00:20.897: RADIUS:   Cisco AVpair       [1]   29  
> "disc-cause-ext=Lost Carrier"
> 
> PS: Router is a 7206 (12.3(1)) used as a LNS.
> 
> -- 
> ***********************************
>    Chatzithomaoglou Anastasios
> Network Design & Operations Center
>           FORTHnet S.A.
>       <achatz at forthnet.gr>
> ***********************************
> 
> 
> _______________________________________________
> cisco-bba mailing list
> cisco-bba at puck.nether.net
> http://puck.nether.net/mailman/listinfo/cisco-bba

-- 
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      ||        ||                                 Dennis Peng
      ||        ||        Cisco Systems, Inc.      Escalation Engineer
     ||||      ||||       170 West Tasman Drive    Phone: (408) 526-6143
 ..:||||||:..:||||||:..   San Jose, CA 95134       Fax:   (408) 232-2343
   Cisco Systems Inc.                              dpeng at cisco.com
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