cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1448
Views
0
Helpful
6
Replies

Issue on IOS MTP on Cisco ISR 4331

tmohamudally
Level 1
Level 1

Hi All,

I am facing a strange issue on some IOS MTP on Cisco ISR 4331. On my environment I have an IVR system. To reach this IVR,  MTP must be used. I have a pool of IOS MTP hosted on Cisco 2911 routers and Cisco ISR 4331 routers. When CUCM allocates an IOS MTP hosted on a Cisco 2911, every works fine. However when CUCM allocates an IOS MTP hosted on a Cisco ISR 4331, the greeting message of the IVR is not heard. I did multiple captures and found that in the case of the 4331 the IVR send the RTP stream to the MTP but the latter does not relay the RTP stream to the calling endpoint. 

 

I do not know if there any thing different between IOS MTP on Cisco 2911 and Cisco 4331. 

 

As a workaround I have removed the IOS MTP on the Cisco 4331 from the MRGL.

 

Has someone encountered anything like this?

 

6 Replies 6

Chris Deren
Hall of Fame
Hall of Fame

Can you post the configs of both routers?

Is codec passthrough configured under the MTP profile?