IP Telephony: Q931 errors with Cisco IAD ISDN PRI

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Jul 13th, 2009
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CAN ANYONE TELL ME WHAT THES DEBUG ERROR MESSAGES MEAN. ALSO HERE IS MY IAD CONFIG AS WELL. NEED HELP PLEASE!


Jul 13 15:55:51.848: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:55:51.848: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:55:52.844: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:55:52.844: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:55:53.844: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:55:53.844: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:55:54.844: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:55:54.844: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:55:59.844: ISDN Se0/0:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x0021

Cause i = 0x809F - Normal, unspecified

Jul 13 15:55:59.848: ISDN Se0/0:23 SERROR: L3_GetUser_NLCB: EVENT 0X5A No NLCB 2

Jul 13 15:55:59.848: ISDN Se0/0:23 **ERROR**: L3_BadPeerMsg: event 0x5A cr 0x8021 callid 0x0

Jul 13 15:56:04.348: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:56:04.348: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:56:05.344: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:56:05.344: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:56:06.344: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:56:06.344: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:56:07.344: ISDN Se0/0:23 Q931: RX <- BAD PACKET()

Jul 13 15:56:07.344: ISDN Se0/0:23 Q931: do_statistics: protocol 0x80 protocol not supported.

Jul 13 15:56:12.344: ISDN Se0/0:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x0022

Cause i = 0x809F - Normal, unspecified

Jul 13 15:56:12.348: ISDN Se0/0:23 SERROR: L3_GetUser_NLCB: EVENT 0X5A No NLCB 2

Jul 13 15:56:12.348: ISDN Se0/0:23 **ERROR**: L3_BadPeerMsg: event 0x5A cr 0x8022 callid 0x0

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pcameron Mon, 07/13/2009 - 18:23
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Looks like you there is a Q921 message coming using and undefined protocol value. This likely does not correspond to any standard message type based on the configured ISDN switch type.


You may have a ISDN switch type mismatch, or the external device may be sending some kind of proprietary or corrupted messages. What are you connecting the router to ?


The packets are coming at exactly 1 second intervals so the Service Provider might be able to tell you what they are.


pcameron Tue, 07/14/2009 - 05:54
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  • Cisco Employee,

By any chance is one side configured as QSIG and the other side is a different type of ISDN switch type? This might explain the protocol errors.


Otherwise you might need to get some help off 3Com to explain why a) they are sending this undefined message or b) what message from the Cisco IAD is triggering this response from the 3Com.

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