Question

Limiting bandwidth for streaming online audio/video

Bandwidth management, QoS, CoS, DSCP, ACL, Switches, Routers

We have a T1 that was overcrowded by streaming radios,videos youtube, etc. as soon as we installed a fancy new 3Com Baseline Plus Switch with QoS. It was giving higher priority on the parasyte traffic (video/radio) than the legit (http/ftp). We also have a couple of IP Phones that we hardly use. Is there a way to isolate the online streaming traffic from all users and cap it at a set bandwidth? We also have a Cisco 1700 router.
alternatively I am looking for a way to identify those packets, in case I have to filter them with ACS. Where can I find a reference on the "DSCP to queue" and "CoS to queue" values for the different types of packets(i.e. put low priority on a you-tube video, so it doesn't crowd out the rest of the traffic at peak times, but plays ok off peak). Don't laugh, but I am mostly looking for the opposite of QoS (except for the actual ip phone traffic)

Your bottleneck is at the ISP facing router. That's where I would do your filtering and queuing. Since you only have a couple of phones, I would concentrate on cleaning up your traffic first. Configure/show nbar stats to see whats clogging up your pipe. Then, on the router, set up your class-map for the traffic you wont to limit or "police"


class-map VoIP

!
class-map match-any WasteofBandwidth
match protocol gnutella
match protocol kazaa
...
...

! Then you need to drop any of the matching packets or enforce a threshold.

policy-map WasteofBandwidth
class WasteofBandwidth
(drop | police {bandwidth-limit})

make sure you enable the policy on one of your interfaces
eg.
interface fast0/1
service-policy out WasteofBandwidth