QoS on 3560x IPBase

[andrewrocks]

I have two Cisco 3560x switches running IPBase on different sites joined by a 1gbps connection with routed ports. I have video data totalling 80mbps in site A that is crucial to arrive at Site B regardless of any other traffic on the network.

What I would ideally like to do is reserve 100mbps on the link from A->B which is only allowed to be used for this traffic. The traffic starts in a subnet of its own and finishes in a subnet of its own (i.e. only the video traffic is in the VLAN on each switch with data and voice in different subnets).

Any help is appreciated

Thank you         

[Joseph W. Doherty]

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Posting

That can be done by enabling QoS, then insuring one of the ports 4 egress queues will guarantee 10% of the gig bandwidth (by default each starts with 25%) and then insuring video stream is the only traffic in that queue.

PS:

If this video is conferencing, not streaming, you might want to enable PQ on queue 1 and drop the video traffic into that queue.

PPS:

You might also try auto-QoS on your egress port.  Then adjust to your requirements.  (Warning - take snapshot of config before activation as there will be lots of configuration changes.)

[andrewrocks]

Hi Joseph,

Thanks for that. I don't like "Auto" things as I like to know how they're setup.

Can you get me started with the config for the 4 egress queues you refer to? How do I assign traffic into a particular queue? (I've never done QoS before)

Thanks

[Joseph W. Doherty]

Disclaimer

The    Author of this posting offers the information contained within this    posting without consideration and with the reader's understanding that    there's no implied or expressed suitability or fitness for any  purpose.   Information provided is for informational purposes only and  should not   be construed as rendering professional advice of any kind.  Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In    no event shall Author be liable for any damages whatsoever  (including,   without limitation, damages for loss of use, data or  profit) arising  out  of the use or inability to use the posting's  information even if  Author  has been advised of the possibility of such  damage.

Posting

Andrew, in this instance, the auto-QoS feature adds configuration statements - nothing is hidden.  It's also a one-time add (with invocation of the auto) so you can change them however you like, including removing them.  (NB: there no simple no auto.)

If you're IOS is relatively recent, which it should be with a -X model, the QoS statements added are in-line with Cisco's latest Medianet QoS recommendations.

The primary reason I suggested this, it auto-QoS will show you how to configure the switch's QoS features, i.e. I think it would be useful, as an example, for getting started, especially in getting traffic into a particular queue.

[andrewrocks]

Thanks, I'll try this tomorrow in the lab.