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

[Eric Pedersen]

I've seen this too. I saw the CUBE range documented somewhere and it didn't match our router ACLs.  Just do "rtp-port range 16384 32766" under "voice service voip".


Eric Pedersen, Manager, Network and Security Services, Bennett Jones SLP
T. 403 298 4498<tel:403%20298%204498> | F. 403 265 7219<tel:403%20265%207219>

From: cisco-voip <cisco-voip-bounces at puck.nether.net> On Behalf Of Ariel Roza
Sent: Friday, July 5, 2024 1:58 PM
To: cisco-voip at puck.nether.net
Subject: [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 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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