Configure QoS on HP Procurve for Tandberg Edge 95

[ictrhine]

I am new to the VTC environment. We have just had Edge 95 codecs installed and on some sites we have 2Mb leased lines and on others we have standard ADSL connections. We have setup 100Mb FD from Codec to Router but we still get packet loss on video where sometimes it becomes blocky. I have been told that setting QoS priorities on the switches would help but I have no idea where to begin. Any help you guys can provide would be most appreciated.

[robertk]

To gain anything from QoS you need to have QoS supported End to END.

QoS will not improve anything, QoS can be used to prioritize packets on a network, but it will not help if you have a bad network to start with.

And making a educated guess from when you say that some sites use ADSL lines, is that you are placing calls over public internet?

If I where you I would start to narrow down the problems and find where the bottlenecks are. Make test-calls within your lan, and then to sites using ADSL, make a note if you see any differences in quality. Contact your Videoconference supplier and support and get them to help you.

//Robert

[ictrhine]

Thanks Robert.

Yes we do make calls over the public internet. I work in a school environment where private lines are not an option.

It was my VC reseller that suggested QoS.

I will as you suggest start at the bottom and try making video calls within the lan first and work outwards.

As I am new to this can you tell me if I set a call at 384 does this mean I need 384+20% download as well as 384+20% for upload?

Please excuse my ignorance on these matters!!!

[robertk]

H.323 calls are by default symmetrical, same MAX bandwidth up as down. However, the calls are not limited to this, you can have different bandwidths and protocols for each direction.

Some endpoints can limit upload BW so you have a better experience when you use a ASYMMETRICAL network, such as ADSL. But the easiest way is to choose a call-bandwidth that fit the lowest bw of the ADSL line.

//Robert