VLAN QoS

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Feb 19th, 2009
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Hi Guys,


I need some help with QoS with this scenario. Take a look at the attached.


There are 3 sites connected with 100Mbps LES circuits with a 3560 on each site.


I have configured STP priority to load share some of the traffic.


Vlan 100 is going to be used to route Voice and Data between site 1 and 2. I would like this to have priority over the other VLAN's


I would also like the Voice to have priority over the Data within VLAN 100.


VLANS 20-23 are just Layer 2 VLANS for some services between sites but I don't want them choking VLAN 100 in the case of a link failure.


I have QOS configured on each site for the LAN where the 802.1p is trusted for the Voice but I need some help with the other stuff.


Many Thanks in advance.


Phil



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Edison Ortiz Thu, 02/19/2009 - 09:54
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Vlan 100 is going to be used to route Voice and Data between site 1 and 2.


I recommend having one Vlan for Voice and another Vlan for Data.


Having both traffic on the same Vlan is just a bad design all around.


As for QoS features within the 3560, you are quite limited. It's mainly used for marking traffic and it has limited queueing/prioritization options.


Please refer to the documentation:


http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_46_se/configuration/guide/swqos.html


HTH,


__


Edison.

shevchiksv Sat, 02/21/2009 - 13:12
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I think that you can create, for example, 1st queue(priority queue) for your voice and date vlans, mark it(vlan-based), and give priority before other type of traffic. As for ingress queueing you also have default 2 queue. So i suppose that 3560 has still sufficient queueing features


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