[cisco-voip] [EXTERNAL] RTP ports outside 16384 - 32767 range

[JASON BURWELL]

I had similar issues with a 4K CUBE and was told by TAC that depending on what ISR you are using for the CUBE, it has its own defined range that is outside of the standard ranges. So, you may need to dig in to your specific model and CUBE version for more detailed info on requirements. Here is the URL for the ISR 4K CUBE docs.

https://www.cisco.com/c/en/us/td/docs/routers/access/4400/release/notes/isr4451rn.html#pgfId-176593


Jason

From: cisco-voip <cisco-voip-bounces at puck.nether.net> On Behalf Of Ariel Roza
Sent: Friday, July 5, 2024 3:58 PM
To: cisco-voip at puck.nether.net
Subject: [EXTERNAL] [cisco-voip] RTP ports outside 16384 - 32767 range

Hi everyone, I have a Cisco Router with an E1 interface testing some calls against a CUBE. In my call attempts I see the SDPs between both devices using higher and lower ports for RTP, outside the 16384 - 32767 range, For example, the INVITE

Hi everyone,

I have a Cisco Router with an E1 interface testing some calls against a CUBE.

In my call attempts I see the SDPs between both devices using higher and lower ports for RTP, outside the 16384 - 32767 range,

For example, the INVITE coming from the router has

m=audio 44480 RTP/AVP 8 0 18 101

and the sdp on the responding 200 OK is

m=audio 11002 RTP/AVP 8 101

Why is it like that?

(Not including full SDPs for the sake of brevity)

Regards,
Ariel Roza
Deployment Engineer IV
ariel.roza at bvstv.com<mailto:%7BE-mail%7D>

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