10-14-2005 11:39 AM - edited 03-03-2019 10:43 AM
One of the SPIDs on our 3845 is going vlaid and establishes connectivity and the next moment goes invalid. Therefore Layer 2 is just bouncing like every 4 secs. I had telco test, verified SPIDs. I am also observing some strange 'show isdn status' output.
When both SPIDs are valid the output seems normal. But when the second SPID becomes invalid layer3 in the 'show isdn status' is as follows:
Layer 3 Status:
0 Active Layer 3 Call(s)
CCB:callid=0, sapi=0, ces=2, B-chan=0, calltype=INTERNAL (BR0/0/0) SPC
Call
Active dsl 0 CCBs = 1
The Free Channel Mask: 0x80000003
Shouldn't CCB be allocated only when there is an active call? I am little confused with this output actually.
Any ideas?
Thanks,
Ranjani
10-14-2005 12:14 PM
Ranjani,
Can you post a complete sh isdn status output (when its valid and not valid). Also include a debug isdn q921 output.
10-14-2005 01:56 PM
Thanks for your reply. Unfortunately I cannot issue a debug command right now..but here is the other output you requested. Thanks
Oct 14 12:13:03.896 PDT: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0/0/0, TEI 87 changed to down
Oct 14 12:13:07.936 PDT: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0/0, TEI 87 changed to up
Oct 14 12:13:09.916 PDT: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0/0/0, TEI 87 changed to down
PHX1-MDFA1-ART1#sh isdn status
Global ISDN Switchtype = primary-4ess
ISDN BRI0/0/0 interface
dsl 0, interface ISDN Switchtype = basic-ni
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 86, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI = 87, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI 86, ces = 1, state = 5(init)
spid1 configured, no LDN, spid1 sent, spid1 valid
Endpoint ID Info: epsf = 0, usid = 70, tid = B
TEI 87, ces = 2, state = 5(init)
spid2 configured, no LDN, spid2 sent, spid2 valid
Endpoint ID Info: epsf = 0, usid = 71, tid = B
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000003
%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 1. Layer 3 output may not apply
ISDN Serial0/2/0:23 interface
dsl 1, interface ISDN Switchtype = primary-4ess
L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 1 CCBs = 0
The Free Channel Mask: 0x807FFFFF
Number of L2 Discards = 0, L2 Session ID = 12
Total Allocated ISDN CCBs = 0
PHX1-MDFA1-ART1#
PHX1-MDFA1-ART1#sh isdn status
Global ISDN Switchtype = primary-4ess
ISDN BRI0/0/0 interface
dsl 0, interface ISDN Switchtype = basic-ni
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 86, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI = 87, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI 86, ces = 1, state = 5(init)
spid1 configured, no LDN, spid1 sent, spid1 valid
Endpoint ID Info: epsf = 0, usid = 70, tid = B
TEI 87, ces = 2, state = 4(await init)
spid2 configured, no LDN, spid2 sent, spid2 NOT valid
Layer 3 Status:
0 Active Layer 3 Call(s)
CCB:callid=0, sapi=0, ces=2, B-chan=0, calltype=INTERNAL (BR0/0/0) SPC Call
Active dsl 0 CCBs = 1
The Free Channel Mask: 0x80000003
%Q.931 is backhauled to Q.931 0x0000 on DSL 1. Layer 3 output may not apply
ISDN Serial0/2/0:23 interface
dsl 1, interface ISDN Switchtype = primary-4ess
L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 1 CCBs = 0
The Free Channel Mask: 0x807FFFFF
Number of L2 Discards = 0, L2 Session ID = 12
Total Allocated ISDN CCBs = 1
PHX1-MDFA1-ART1#
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