[cisco-voip] BRI Interfaces

H, Tim TimH at trstone.com
Tue Apr 6 14:05:58 EDT 2010


I've finally fixed my BRI issue.  I had to use this setting: "isdn static-tei 0" http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a00800a7b30.shtml

I now have more issues.  Layer 2 is completely up and working.  I still can't manage to make calls outbound or inbound.  I've attached the debug isdn q931 for inbound and outbound calls.  Any help is appreciated.

Outbound:
Apr  6 17:57:10.402: ISDN BR0/0/0 Q931: TX -> SETUP pd = 8  callref = 0x08
        Sending Complete
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0x8A
                Exclusive, B2
        Calling Party Number i = 0x0081, '<REMOVED NUMBER>'
                Plan:Unknown, Type:Unknown
        Called Party Number i = 0x80, '<REMOVED NUMBER>'
                Plan:Unknown, Type:Unknown
Apr  6 17:57:10.646: ISDN BR0/0/0 Q931: RX <- CALL_PROC pd = 8  callref = 0x88
        Channel ID i = 0x8A
                Exclusive, B2
Apr  6 17:57:10.646: ISDN BR0/0/1 Q931: RX <- CALL_PROC pd = 8  callref = 0x88
        Channel ID i = 0x8A
                Exclusive, B2
Apr  6 17:57:10.902: ISDN BR0/0/1 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x08
        Cause i = 0x82D1 - Invalid call reference value
Apr  6 17:57:13.658: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0/1, TEI 0 changed to down
Apr  6 17:57:13.918: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0/1, TEI 0 changed to up
Apr  6 17:57:28.366: ISDN BR0/0/0 Q931: TX -> DISCONNECT pd = 8  callref = 0x08
        Cause i = 0x8290 - Normal call clearing
Apr  6 17:57:28.490: ISDN BR0/0/0 Q931: RX <- RELEASE pd = 8  callref = 0x88
        Cause i = 0x82D1 - Invalid call reference value
Apr  6 17:57:28.490: ISDN BR0/0/1 Q931: RX <- RELEASE pd = 8  callref = 0x88
        Cause i = 0x82D1 - Invalid call reference value
Apr  6 17:57:28.742: ISDN BR0/0/1 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x08
        Cause i = 0x82D1 - Invalid call reference value
Apr  6 17:57:29.502: ISDN BR0/0/0 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x08
Apr  6 17:57:30.502: ISDN BR0/0/0 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x08
Apr  6 17:57:31.502: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0/1, TEI 0 changed to down
Apr  6 17:57:31.766: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0/1, TEI 0 changed to up

Inbound: And I do have a number assigned that should pick up this call, not sure why it's not.
Apr  6 18:04:10.613: ISDN BR0/0/0 Q931: RX <- SETUP pd = 8  callref = 0x01
        Sending Complete
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0x89
                Exclusive, B1
        Calling Party Number i = 0x1181, '<REMOVED NUMBER>'
                Plan:ISDN, Type:International
        Called Party Number i = 0xC1, '<REMOVED NUMBER>'
                Plan:ISDN, Type:Subscriber(local)
Apr  6 18:04:10.613: ISDN BR0/0/1 Q931: RX <- SETUP pd = 8  callref = 0x01
        Sending Complete
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0x89
                Exclusive, B1
        Calling Party Number i = 0x1181, '<REMOVED NUMBER>'
                Plan:ISDN, Type:International
        Called Party Number i = 0xC1, '<REMOVED NUMBER>'
                Plan:ISDN, Type:Subscriber(local)
Apr  6 18:04:10.865: ISDN BR0/0/0 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x81
        Cause i = 0x8281 - Unallocated/unassigned number
Apr  6 18:04:10.877: ISDN BR0/0/1 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x81
        Cause i = 0x8281 - Unallocated/unassigned number

Thanks,

Tim

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of H, Tim
Sent: Monday, April 05, 2010 1:14 PM
To: cisco-voip at puck-nether.net
Subject: Re: [cisco-voip] BRI Interfaces

I might also mention that we're using straight through cables for this as opposed to crossover cables.

Could this be the issue? It's a remote site so I can't test.

Tim

From: H, Tim
Sent: Monday, April 05, 2010 12:47 PM
To: cisco-voip at puck-nether.net
Subject: BRI Interfaces

All,

Having some issues setting up my first BRI interface.  I copied some of the MGCP gateway config below.  Is anyone out there using BRIs? Maybe you could cross-reference your config with mine.

I've debugged ISDN q931 and have not been able to see anything even attempt to enter.  After doing some research on "spoofing" it looks like it's just a way for the router to show the interface as up so all of the protocols can still run even though it is not actually up.

Any ideas would be helpful.

Show Run:
interface BRI0/0/0
 no ip address
 isdn switch-type basic-net3
 isdn point-to-point-setup
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager service mgcp

Show Int:
BRI0/0/0 is up, line protocol is up (spoofing)
  Hardware is Voice NT or TE BRI
  MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation VOICE, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/16703/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 48 kilobits/sec
  5 minute input rate 0 bits/sec, 1 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     1181718 packets input, 7417849 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     16703 input errors, 16689 CRC, 0 frame, 0 overrun, 0 ignored, 6934 abort
     200190 packets output, 1452880 bytes, 0 underruns
     0 output errors, 0 collisions, 12 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     23 carrier transitions

Tim

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