RTP Ports

[ariazk]

is there any way to clasify RTP on UDP port basis, coz rtp sessions use a huge range.

my router doesn't support to clasify on application level.

[fred.s.mollenkopf]

Here is the typical statement for RTP.

ip access list extended Voice

permit udp any any range 16384 32767

class-map match-all Voice

match access-group name Voice

policy-map LLQ

class Voice

set ip dscp 46

This is usually not an issue on a Voice network since it's usually logically separated from the data network. Traditional Video Conference has always relied on endpoint trusting and something like Cisco VT Advantage uses a static udp port 5445 for RTP which makes classification easy in the network.

Please rate any helpful posts

Thanks

Fred

[ariazk]

thanks fred, my RTP forwarder is using huge range like it can use any port above than 10000 and I am using juniper M7 as long as i know there is no option to define acl on voice basis or i would need another JNOS,

cheers

[teodorgeorgiev]

Why don't you set all the voice gateways and softswitches to mark the media and signalling with a specific ToS? Almost all of the voice gateways and softswitches -> Cisco, Quintum, MERA MVTS, GnuGK, NexTone, Welltech/Micronet and others can do it...

[ariazk]

I cant mark the flow untill I would clasify the traffic, like JNOS you need to clasify flow first after clasifying your desired flow you can mark it as EF,AF or BE. as far as I understand JNOS behaviour I have to clasify flow first.

thanks