10-03-2010 11:27 PM - edited 03-16-2019 01:08 AM
Voice Gaeway, suddenly E1 PRI controller E10/0/0 and associated serial interface channel flaps, going down and up several times in a minutes.
Once Voice Gateway is restarted it is back to normal.
Getting following logs during serial flap.
480: 1153639: Oct 2 17:46:15.515: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to down | |||||||||
481: 1153642: Oct 2 17:46:47.514: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to up | |||||||||
482: 1153650: Oct 2 17:57:04.503: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to down | |||||||||
483: 1153653: Oct 2 17:57:55.502: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to up | |||||||||
484: 1153661: Oct 2 17:59:04.501: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to down | |||||||||
485: 1153662: Oct 2 17:59:08.261: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller E1 0/0/0 | |||||||||
486: 1153663: Oct 2 17:59:10.765: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller E1 0/0/0 | |||||||||
487: 1153666: Oct 2 18:00:00.500: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to up | |||||||||
488: 1153674: Oct 2 18:00:20.500: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to down |
Voice Gateway running on Cisco 2821 with IOS : c2800nm-advipservicesk9-mz.124-17a.bin
Below commands are configured on VG
network-clock-participate wic 0
network-clock-select 1 E1 0/0/0
and
there is not input or CRC error on E1 line.
Provider tested E1 last later and found there is no problem with E1 line.
Pls. suggest what was causing this E1 PRI flap? how to prevent it from ocuring again?
Rgds
Rajesh
10-04-2010 01:51 AM
Which exact IOS are you using ?
10-04-2010 02:52 AM
Dear p.bevilacqua
c2800nm-advipservicesk9-mz.124-17a.bin
Rgds
Rajesh Kumar
10-04-2010 02:59 AM
You could try updating IOS just for a test.
However it's more likely that is an issue with the circuit, even if telco denies the fact.
10-04-2010 07:25 AM
Is this MGCP or H323? Do you have ccm config server enabled if it is MGCP?
You should run 'debug isdn q921' and see why the D channel is going down. It may be a L2 issue instead of L1.
11-01-2010 02:54 AM
Hi,
We are having the exact same issue with an MGCP gateway running IOS spservicesk9-mz.124-22.T5.
This only effects 1 out of 5 voice gateways, all runing the same IOS. The current thinking is that it is a telco issue, but wondering if you got to the bottom of this issue yourself?
Many thanks
Jonathan
11-01-2010 03:03 AM
Hi,
It was Telco Problem, we replaced DB9-Rj45 converter which was connected to Telco PRI device.
Then problem resolved.
Problem was with service provider equipment.
11-01-2010 04:07 AM
Many thanks for the information, we'll chase this with the Telco,
Cheers
Jonathan
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