[AFMUG] DiffServ and the internet

[George Skorup (Cyber Broadcasting) via Af]

Speaking of DSCP and carriers zeroing it in the middle, I have some VoIP 
Innovations trunks. I know where the SIP messages are coming from, so I 
can mangle a DSCP value back onto those packets at ingress. But the RTP 
traffic comes from all over the freakin place, tons of different source 
address, never the same. I've asked if they could provide a list and 
pretty much got a no.

Anybody have any ideas? Any way for a MT to identify an RTP stream and 
then dynamically add a mangle rule to change the DSCP value? My MT 
script-fu is not strong.