Transcoders stucks in active mode

[Ccoria1989]

Hi

I have a problem with my CUBE and its transcoders. Sometimes the transcoders doesn´t release the resource and the gateway drops the next calls.

The problem solves with shut and no shut the dspfarm profile, this impacts the production.

This is my dspfarm configuration:

dspfarm profile 1 transcode universal 

codec g729br8

codec g729r8

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

maximum sessions 100

associate application CUBE

My call flow is like this:

H323 -> CUBE -> SIP

I hope you can help me.

Regards.

[Manish Gogna]

Hi,

If the transcoder sessions are released after resetting or shut / no shut of dspfarm profile then it points to some kind of a bug with the ios / dsp. Can you please share the ios version of CUBE gateway.

HTH

Manish

[Ccoria1989]

Hi Manish

My CUBE is 2921 with IOS Version 15.3(3)M

Regards

[Nadeem Ahmed]

Hello ,

What is verion that you are using?

Br,
Nadeem 

Please rate all useful post.

[Ccoria1989]

Hi Nadeem

My CUBE is 2921 with IOS Version 15.3(3)M

Regards

[Manish Gogna]

A couple of related bugs

CUCM related

https://tools.cisco.com/bugsearch/bug/CSCtx35461/?reffering_site=dumpcr

CUBE related

https://tools.cisco.com/bugsearch/bug/CSCui84617/?reffering_site=dumpcr

HTH

Manish

[Ccoria1989]

Hi Manish

I see that the CUBE bug is for ASR and the bug for CUCM is most like our case but my transcoders are not SCCP, my transcoding is LTI. I don´t know if the CUCM bug apply for my problem, my CUCM version is 9.1.2.10000-28.

Regards.

[Ccoria1989]

Hi everyone

I found this bug

https://tools.cisco.com/bugsearch/bug/CSCue43682

It is very similar with my case but it is for an AS5300 and I have gateway 2921 with ios 15.3(3)M3 (I upgraded the ios but the problem persist).

What do you think?

Regards.


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[Manish Gogna]

At this stage it would be good if you can collect a detailed callmanager trace for a test call where a transcoder is invoked and get the corresponding debugs from the gateway. You are already running a cucm version that should have the fix for the cucm bug that i mentioned earlier.

HTH

Manish

[Ccoria1989]

Hi Manish

Although my transcoder are not SCCP the cucm bug should apply? Because I configured Local Transcoding Interface LTI

The bug that I posted previously does not apply for my issue?

Regards.

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[Manish Gogna]

Hi,

I missed the part that its an LTI , in that case the troubleshooting would be primarily focussed on the DSP's because in LTI based Xcoding internal API are used to access DSP resources for transcoding. Do you see any dsp related errors on the CUBE?

Manish

[Ccoria1989]

Hi Manish

This method works for see errors of DSPs?

http://docwiki.cisco.com/wiki/Cisco_IOS_Voice_Troubleshooting_and_Monitoring_--_Digital_Signal_Processor_Troubleshooting

Because is a productive environment and that commands increase CPU and memory usage. Or what method do you recommend?

With a simple sh log I do not see any error.

Regards.


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[Manish Gogna]

show voice dsp group all

show voice dsp crash-dump

Manish

[Manish Gogna]

And yes, it can spike the CPU.

manish

[Ccoria1989]

Hi Manish

We have in freeze and we can't do anything but next week I will review that information.

Regards.


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