QOS basics

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Jun 21st, 2007
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I have a typical network Main site with two remote sites. At each site there is a 2800 and a downstream 3550 poe switch where the phones connect. I need to set up some local LAN qos on the ports and then prioritise the voice traffic across the WAN. I am quite new to QOS so could any body give me a guide of where to start or provide any sample configs?

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paolo bevilacqua Thu, 06/21/2007 - 02:02
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Hi,


Let alone the LAN for now as it won't give you any problem. Please state how your WAN is made, links type and speed, routers used, etc.

ajames2007 Thu, 06/21/2007 - 02:33
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ok

one site has a 2811 router with a connected les 10 circuit which connects back to the main site remote site two has a 2600 with a 2mb leased line Both remote site ciruits are provided by BT. The mail site has 4500 which terminates both remote site connections

Thanks


paolo bevilacqua Thu, 06/21/2007 - 03:44
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Hi,


For the 10 mpbs circuit, once again I would not configure anything. For the 2 mpbs, give a look to "show interfaces" on both sides. If you have "packet drops" increasing a peak times, you may want to configure basic LLQ per document:


http://cisco.com/en/US/partner/products/sw/iosswrel/ps1830/products_feature_guide09186a0080087b13.html


Note, the match can done much simpler on dscp EF that you telephones should be using already.


Note also, your 4500 router may have a too old IOS to support that.


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