Limiting bandwidth for streaming online audio/video

65 pts.
Tags:
ACL
Bandwidth management
CoS
DSCP
QoS
Routers
Switches
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)

Answer Wiki

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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

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