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New Member

ISDN layer 2 flapping

Hi All,

I have a problem with an isdn circuit layer 2 and have been through other postings but none have helped so far.

*Oct 2 12:06:49.391: %CONTROLLER-5-UPDOWN: Controller E1 0/1/0, changed state t

o down (AIS detected)

*Oct 2 12:06:49.395: %ISDN-6-LAYER2DOWN: Layer 2 for Interface Se0/1/0:15, TEI

0 changed to down

*Oct 2 12:06:51.391: %LINK-3-UPDOWN: Interface Serial0/1/0:15, changed state to

down

*Oct 2 12:07:15.391: %CONTROLLER-5-UPDOWN: Controller E1 0/1/0, changed state t

o up

*Oct 2 12:07:15.411: %ISDN-6-LAYER2UP: Layer 2 for Interface Se0/1/0:15, TEI 0

changed to up

*Oct 2 12:07:17.391: %LINK-3-UPDOWN: Interface Serial0/1/0:15, changed state to

up

*Oct 2 12:07:36.391: %CONTROLLER-5-UPDOWN: Controller E1 0/1/0, changed state t

o down (RAI detected)

*Oct 2 12:07:36.395: %ISDN-6-LAYER2DOWN: Layer 2 for Interface Se0/1/0:15, TEI

0 changed to down

*Oct 2 12:07:38.391: %CONTROLLER-5-UPDOWN: Controller E1 0/1/0, changed state t

o up

*Oct 2 12:07:38.419: %ISDN-6-LAYER2UP: Layer 2 for Interface Se0/1/0:15, TEI 0

changed to up

*Oct 2 12:07:46.459: %ISDN-6-LAYER2DOWN: Layer 2 for Interface Se0/1/0:15, TEI

0 changed to downC

Any ideas ??

6 REPLIES
New Member

Re: ISDN layer 2 flapping

I'm from the US and don't get to see E1's very often, but the last time I saw behavior like this, I had to have the Telco change the port out that they were using on their switch and it resolved the problem. Have you tried anything with the Telco yet?

HTH,

Steve

New Member

ISDN layer 2 flapping...

I have changed BRI card but still showing below logs

Aug 22 09:10:23.256: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0, TEI 89 changed to up
Aug 22 09:10:32.116: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/1/0, TEI 80 changed to down
Aug 22 09:10:32.116: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/1/0, TEI 89 changed to down
Aug 22 09:11:10.321: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0, TEI 96 changed to up
Aug 22 09:11:10.465: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0, TEI 105 changed to up
Aug 22 09:12:07.123: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/1/0, TEI 96 changed to down
Aug 22 09:12:07.123: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/1/0, TEI 105 changed to down
Aug 22 09:12:37.680: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0, TEI 112 changed to up
Aug 22 09:12:37.816: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0, TEI 65 changed to up

Re: ISDN layer 2 flapping

Kindly check the PIN-OUT to be used. Make sure the cable connected is according to the recommended PIN-OUT. Also if there is any working cable, you can try that as well.

Check the framing and CRC set from the ISP and configure it acordingly on your side. Try to bounce the framing on the controller. 

Provider can also check on their end too. 


HTH
Regards
Abhay

Re: ISDN layer 2 flapping

dont waste any time, book it out to the telco. have them test mdf/idf

 

please rate if helpful

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New Member

Re: ISDN layer 2 flapping

Thanks same has been shared with telco

Re: ISDN layer 2 flapping

Keep this thread posted
Regards
Abhay
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