06-15-2006 08:04 PM - edited 03-03-2019 01:01 PM
Hi All,
I am having some problems on an ISDN link that dials into our main office.
The router dials out, but I am not seeing the call come in at the central office.
Attached is a text file showing the basic config and the output from debug isdn standard.
thanks in advance for any help. :)
06-16-2006 02:52 AM
also run a 'debug isdn q931'
this will show us some behind the scenes isdn operation.
how about show us the isdn interface configs as well.
06-18-2006 04:46 PM
Hi,
Please find the debug isdn q931 and q921. It is strange that they are not showing much and makes me really believe that my problem is with the remote router.
The central router is working for other sites that dial in as well.
I have also ran the configuration through output interpretor with no errors. A few warnings, but no errors. I have changed the IP addresses and the passwords on the configuraion.
I keep comming up with that weird **Error**. I havent seen it before and think this is a real hint.
thanks very much for your help.
06-16-2006 08:17 AM
on the central router , use the isdn test call int bri x/x command onto its own number and see if this works. what type of router at central and what isdn cards ?
06-16-2006 08:56 AM
While I agree that running debug isdn q931 is frequently good and may give helpful information, I believe that the debug that was posted does show that there is an incoming call. The debug that I would be particularly interested in would be debug ppp authentication. I suspect that there is an authentication problem - especially because I do not see any authentication configured in the partial config that was posted.
HTH
Rick
06-18-2006 04:54 PM
Hi and thanks very much for your reply. I took the authentication out of the previous config just to narrow down potential prospects.
When I run debug ppp events, authentication, and negotiatiion.... I am not getting output. Also, when I run debug ISDN at the central site, I can see that the call is not making it back to the central office. The router tries to dial out, but it is not successful in making it past the first ISDN switch as the debug q921 shows on another reply.
I ran the config past the output interpretor tool this morning with no reported errors as well. hmmm.... not sure what to do at this point. I might pass this one onto our lead engineer who will hopefully log a TAC case.
Thanks again for all of your help.
06-19-2006 08:40 AM
I am surprised that you are not getting any output from debug ppp negotiation, ppp authentication, or ppp events. I thought that the original debug did indicate an incoming call. Perhaps the output of debug isdn q931 would be more helpful that I had thought.
HTH
Rick
06-20-2006 07:34 PM
06-22-2006 08:38 AM
Thanks for posting the additional information. There is quite a bit of debug enabled and very little debug output which I thought was strange. So I went back to the information that you had posted before and took a closer look at the show tech that you posted. I found this in the output:
BRI unit 0:
Layer 1 is DEACTIVATED. (ISDN L1 State F3)
This indicates that there is a problem with the BRI circuit. Can you check this out and let us know what you find?
HTH
Rick
06-18-2006 04:48 PM
Hi,
I checked the central router and it is receiving calls from other routers.
I also reconfigured this remote router to dial our other central router with identical problems and the strange error message.
Thanks very much for your reply.
06-22-2006 09:21 AM
Not sure which debug you have turned on, but "debug isdn Q931" would be more helpful. This will show you the actuall ISDN messages that are being passed between the router and central office and give you a better idea where the failure is happening.
06-22-2006 11:43 PM
06-24-2006 06:18 AM
It does appear that there is a problem with the BRI. If you post the output of show isdn status it might help to confirm this.
HTH
Rick
06-25-2006 04:23 PM
Hi Rick,
Thanks,
Here is the output you requested.
C
Access to this computer system is restricted to authorised personnel only.
Terminate this session immediately if this system has been accessed in error.
You are warned
a) that unautherised access to or modification of information held in this
computer system, and/or
b) unauthorised copying of software, will render you liable to civil damages
and/or criminal penalties in Australia and other countries; and
c) that all sessions on this computer system are monitored, logged and
recorded.
By continuing with this session you represent and warrent that you are
authorised to access this computer system.
Contact a member of CSC Network and Comms in Australia on
+61-(0)8-9420-3090 if you need assistance with your host.
User Access Verification
Username: peterc
rtph101>en
Password:
rtph101#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0/0 interface
dsl 0, 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 0 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
rtph101#term mon
rtph101#show ip int brief | include Dialer1
Dialer1 10.162.0.5 YES NVRAM up up
rtph101#ping 10.62.0.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.62.0.6, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
rtph101#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0/0 interface
dsl 0, 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 0 CCBs = 0
The Free Channel Mask: 0x80000003
--More--
Layer1 does not come up.
06-25-2006 04:31 PM
Hi all,
Show dialer output:
Jun 26 08:26:30 WAST: BR0/0 DDR: rotor dialout [best] least recent failure is al
so most recent failure
Jun 26 08:26:30 WAST: BR0/0 DDR: rotor dialout [best] also has most recent failu
re
Jun 26 08:26:30 WAST: BR0/0 DDR: rotor dialout [best]
Jun 26 08:26:30 WAST: BR0/0 DDR: Dialing cause ip (s=10.162.0.5, d=10.162.0.6)
Jun 26 08:26:30 WAST: BR0/0 DDR: Attempting to dial 0894279500.....
Success rate is 0 percent (0/5)
rtph101#
Jun 26 08:27:00 WAST: BRI0/0: wait for isdn carrier timeout, call id=0x8032
Jun 26 08:27:00 WAST: DDR: Dialing failed, 5 packets unqueued and discarded
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