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New Member

Problem in ISDN

I'm using WIC-1B-U-V2 on 1841 router configured for ISDN .Although ISDN line is o.k we are not able to connect through ISDN we are getting following error when doing debug .

Can u help me what may be the issue

g the remaining 1 calls

*Sep 4 08:28:30.406: ISDN BR0/1/0 **ERROR**: host_disconnect_ack: Unfound B-channel on Disconnect_Ack call id 0x8003

*Sep 4 08:28:31.174: ISDN BR0/1/0 **ERROR**: host_disconnect_ack: Unfound B-channel on Disconnect_Ack call id 0x8004

*Sep 4 08:28:52.402: ISDN BR0/1/0 **ERROR**: CCBRI_Go: NO CCB Src->HOST call id 0x8003, event 0x5 ces 1

*Sep 4 08:28:52.402: ISDN BR0/1/0 **ERROR**: CCBRI_Go: NO CCB Src->HOST call id 0x8003, event 0x5 ces 1

*Sep 4 08:28:53.174: ISDN BR0/1/0 **ERROR**: CCBRI_Go: NO CCB Src->HOST call id 0x8004, event 0x5 ces 1

regards

Ajay Kumar

14 REPLIES
Bronze

Re: Problem in ISDN

Can you provide ur isdn config

Hall of Fame Super Silver

Re: Problem in ISDN

Ajay

In my experience the kind of error messages that you post are sometimes related to physical layer issues. Can you post the output of show isdn status, and of show interface?

HTH

Rick

New Member

Re: Problem in ISDN

Dear Rick

Below is output of sh isdn sta & Sh bri0/1/0

Although Layer is deactivated but as service Provider is checking on ISDN Phone its working fine.

RouterA#sh int bri0/1/0

BRI0/1/0 is up, line protocol is up (spoofing)

Hardware is GT96K BRI (3086)

Description: = = = = ISDN Backup Dialout to Delhi Prirouter = = = =

Internet address is 172.16.0.86/30

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, loopback not set

Keepalive set (10 sec)

Last input never, output never, output hang never

Last clearing of "show interface" counters 13:14:45

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/0/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 48 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 3 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

RouterA#sh isdn sta

Global ISDN Switchtype = basic-net3

ISDN BRI0/1/0 interface

dsl 2, interface ISDN Switchtype = basic-net3

Layer 1 Status:

DEACTIVATED

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 2 CCBs = 0

The Free Channel Mask: 0x80000003

Total Allocated ISDN CCBs = 0

Configuration For BRI

interface BRI0/1/0

description = = = = ISDN Backup Dialout

ip address 172.16.0.86 255.255.255.252

ip pim dense-mode

encapsulation ppp

dialer string XXXXXXXXXX

dialer string XXXXXXXXXX

dialer-group 1

isdn switch-type basic-net3

isdn point-to-point-setup

ppp authentication chap

ppp multilink

end

Hall of Fame Super Silver

Re: Problem in ISDN

Ajay

I do not understand your statement:

Although Layer is deactivated but as service Provider is checking on ISDN Phone its working fine.

The output of show isdn status does seem to confirm that at least at this point that there is a problem with the ISDN that keeps it from working. When that problem is resolved let us know how things are working.

HTH

Rick

New Member

Re: Problem in ISDN

Dear Rick

I mean to say ISDN service provider is telling his isdn line is o.k he proves this by calling through ISDN phone which works perfectly.

Regards

Ajay Kumar

New Member

Re: Problem in ISDN

Hi AJAY

I had faced the similar problem ....were on ISP side switch we gave layer 3 hold command .

At the 1st exchange from the branch office ,they changed the card of the dlc .

Before that they proved with isdn phone that line was fine.....in turn we proved by replacing the router....

After this two changes we didn't had any problem.so try with this..before this ensure ur equipments are fine.

Regards

S.Mahesvaran

New Member

Re: Problem in ISDN

Configuration For BRI

interface BRI0/1/0

description = = = = ISDN Backup Dialout

ip address 172.16.0.86 255.255.255.252

ip pim dense-mode

encapsulation ppp

dialer string XXXXXXXXXX

dialer string XXXXXXXXXX

dialer-group 1

isdn switch-type basic-net3

isdn point-to-point-setup

ppp authentication chap

ppp multilink

end

Silver

Re: Problem in ISDN

Please try to capture the "debug isdn q921" & "debug isdn q931" then post it here for more info. Thx.

Hall of Fame Super Silver

Re: Problem in ISDN

Given the results of show isdn status:

RouterA#sh isdn sta

Global ISDN Switchtype = basic-net3

ISDN BRI0/1/0 interface

dsl 2, interface ISDN Switchtype = basic-net3

Layer 1 Status:

DEACTIVATED

Layer 2 Status:

Layer 2 NOT Activated

debug isdn q921 or debug isdn q931 are predictable and will show that there is no activity.

The provider may say that the ISDN line is fine and may prove it by using an ISDN phone, but something is seriously not working for the router connection. Can Ajay check the physical connection and verify that the interface of the router is connected properly to the correct place for the ISDN line?

HTH

Rick

Silver

Re: Problem in ISDN

Did you carry a very simple step .... to swap the phone cable ? And checked the pin assignment of the cable is correct ?

The way for the provider to prove it work, I suggest to ask the provider to bring a router to your office and plug to ISDN.

Or do you have another router for the test ?

New Member

Re: Problem in ISDN

Dear ajaykumar,

Even I am facing same problem on my network setup. When we expect ISDN will come to help us out as a backup to serial line, ISDN refuses to work by giving this error on console.

Please let me also know if you could resolve the problem

Thanks

Subodh Bapat

Re: Problem in ISDN

Hello,

you might want to try and add the following to both your dialer strings, there is a possibility that the ISDN switch only supports 56K speeds...

dialer string XXXXXXXX class Speed56

!

map-class dialer Speed56

dialer isdn speed 56

Regards,

GNT

New Member

Re: Problem in ISDN

Dear Ajay,

which IOS you are using for 1841.

Rgds,

Hardik..

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