[c-nsp] Problem with ISDN backup (stuck CCBs in 12.3(11)T?)

Fri Nov 19 05:06:26 EST 2004

Hi,

I have the same isdn problem with 836 platform and same version. TAC 
case 600702412

Josh Duffek wrote:

> What does "sh isdn stat" say?

sw#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0 interface
         dsl 0, interface ISDN Switchtype = basic-net3
     Layer 1 Status:
         ACTIVE
     Layer 2 Status:
         TEI = 90, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
     Layer 3 Status:
         0 Active Layer 3 Call(s)
     Active dsl 0 CCBs = 0
     The Free Channel Mask:  0x80000003
     Total Allocated ISDN CCBs = 0

And when trying to call:

Nov 19 09:07:06 CET: BR0 DDR: rotor dialout [best] least recent failure 
is also most recent failure
Nov 19 09:07:06 CET: BR0 DDR: rotor dialout [best] also has most recent 
failure
Nov 19 09:07:06 CET: BR0 DDR: rotor dialout [best]
Nov 19 09:07:06 CET: BR0 DDR: Dialing cause ip (s=80.66.126.250, 
d=80.66.126.249)
Nov 19 09:07:06 CET: BR0 DDR: Attempting to dial 908274047
Nov 19 09:07:06 CET: ISDN BR0 EVENT: UserIdle: callid 0x8008 received 
ISDN_CALL (0x0)
Nov 19 09:07:06 CET: ISDN BR0 EVENT: process_bri_call: call id 0x8008, 
called_number 908274047, Guid BR0speed 64, call type DATA, 
calling_number none....
Nov 19 09:07:14 CET: ISDN BR0 EVENT: process_rxstate: ces/callid 
1/0x8008 calltype 1 HOST_DISCONNECT_ACK
Nov 19 09:07:14 CET: ISDN BR0 **ERROR**: host_disconnect_ack: Unfound 
B-channel on Disconnect_Ack call id 0x8008.

> 
> josh duffek    network engineer
> consultantjd16 at ridemetro.org
> 
> 
>>-----Original Message-----
>>From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
>>bounces at puck.nether.net] On Behalf Of piestaga
>>Sent: Monday, November 15, 2004 5:04 PM
>>To: cisco-nsp at puck.nether.net
>>Subject: RE: [c-nsp] Problem with ISDN backup (stuck CCBs in
> 
> 12.3(11)T?)
> 
>>Hi
>>
>>I would like to come back to the problem I described within this
> 
> threat
> 
>>week
>>ago.
>>
>>I relocated the whole config to router 1603 (where bri is an build-in
>>interface) and I configured the bacap capalility using only the bri
>>interface (without dialer interface)
>>
>>
>>After finishing the config on LAC and LNS everything seemed perfect.
>>
>>The bri config includes the following lines:
>>
>>interface BRI0
>> ip address 3.3.3.10 255.255.255.252
>> encapsulation ppp
>> dialer idle-timeout 30
>> dialer string 1234567
>> dialer-group 1
>> isdn switch-type basic-net3
>> ppp authentication pap
>> ppp pap sent-username USERNAME password 0 PASSWORD
>>
>>
>>/routing to watched address 99.99.99.99 via BRI0
>>primary links are within OSPF so the metric here must be >110/
>>
>>ip route 99.99.99.99 255.255.255.255 BRI0 3.3.3.9 200
>>
>>access-list 177 permit ip 50.50.50.0 0.0.0.255 host 99.99.99.99
>>dialer-list 1 protocol ip list 177
>>
>>
>>and it WORK !!!!
>>
>>The BRI dial to ALC where after preauthentication proccess, the cal
> 
> lis
> 
>>terminated and next the L2TP from LAC to LNS is establish. THe LAN
>>terminates L2TP and ppp session from CPE.
>>
>>I enabled and disabled both primary links and backup prefectly comes u
>>pand
>>down each time.
>>
>>So I decided to relocate the config to 1751 (with the WIC-1B-S/T card
>>instead the build-in one).
>>
>>And it stopped working.
>>
>>
>>Exactly the same behaviour.
>>The BRI tries to dial-up but the following message appeares:
>>
>>host_disconnect_ack: Unfound B-channel on Disconnect_Ack call id
> 
> 0x800D
> 
>>The command "clear int bri0/0" did no t help.
>>The only things that hel pis reload or (what is strange) entering the
>>command:
>>
>>no encapsulation hdlc
>>(despite the fact that ppp is entered in interface config).
>>
>>Unfortunatellu that remove the lines:
>>
>>ppp authentication pap
>>ppp pap sent-username USERNAME password 0 PASSWORD
>>
>>out of the config. So I need put them again.
>>
>>
>>Additionally, except the BRI triggered by the access list 177 (network
>>50.50.50.0 is still pinging 99.99.99.99) the established ISDN call did
> 
> not
> 
>>clear the idle timeout !!!!
>>
>>Show dialer command entred during the active backup call shows that
> 
> the
> 
>>idle
>>timeout is continously countered down.
>>So (in my case) every 30 sec the call is reestablished.
>>
>>
>>Guys please, any help because I am out of ideas what can be wrong.
>>I thought that it is the config issue, but since the same config works
> 
> on
> 
>>other platform, I started susspecting the WIC or the way the WIC is
>>supported on 12.3.(11T)
>>
>>Regards
>>Piestaga
>>
>>
>>
>>
>>
>>-----Original Message-----
>>From: Mark Johnson [mailto:mljohnso at cisco.com]
>>Sent: Monday, November 08, 2004 6:25 PM
>>To: Josh Duffek; piestaga; cisco-nsp at puck.nether.net
>>Cc: cisco-nas at puck.nether.net
>>Subject: Re: [cisco-nas] RE: [c-nsp] Problem with ISDN backup (stuck
> 
> CCBs
> 
>>in
>>12.3(11)T?)
>>
>>At 08:51 AM 11/8/2004 -0600, Josh Duffek wrote:
>>
>>
>>>>Global ISDN Switchtype = basic-net3
>>>>ISDN BRI0/0 interface
>>>>        dsl 0, interface ISDN Switchtype = basic-net3
>>>>    Layer 1 Status:
>>>>        ACTIVE
>>>>    Layer 2 Status:
>>>>        Layer 2 NOT Activated
>>>>    Layer 3 Status:
>>>>        0 Active Layer 3 Call(s)
>>>>        CCB:callid=8097, sapi=0, ces=1, B-chan=1, calltype=DATA,
>>>>hdlctype=HDLC-TRUNK
>>>>        CCB:callid=8098, sapi=0, ces=1, B-chan=2, calltype=DATA,
>>>>hdlctype=HDLC-TRUNK
>>>>    Active dsl 0 CCBs = 2
>>>>    The Free Channel Mask:  0x80000000
>>>>    Total Allocated ISDN CCBs = 2
>>
>>This is your problem; the question is what's causing it.  As Josh
> 
> says,
> 
>>the CCB's are hung (either the initial calls were not cleared
> 
> correctly,
> 
>>or they were but we still didn't clean up after ourselves).
>>
>>VRF Dialer-Watch support was added in 12.3(7)T, but I'm not sure this
>>new functionality would cause this problem.  It's more likely DW/ISDN
>>related.
>>
>>I don't see any bugs that seem relevant.  If possible, I would suggest
>>you reproduce the problem, doing the following:
>>
>>debug dialer
>>debug isdn q931
>>debug isdn code (hidden)
>>debug isdn event
>>sh isdn stat
>>primary(s) down, dialer up
>>primary(s) up, dialer down
>>sh isdn stat
>>und all
>>
>>Thanks,
>>
>>mark
>>
>>
>>
>>
>>_______________________________________________
>>cisco-nsp mailing list  cisco-nsp at puck.nether.net
>>https://puck.nether.net/mailman/listinfo/cisco-nsp
>>archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> 