From: Swaroop Potdar (swarooppotdar@hotmail.com)
Date: Thu Aug 26 2004 - 03:52:28 GMT-3
HI,
Enable Qos globally on your 4500.
and then use trust cos on your interfaces with a cos to dscp mapping table.
or you can simply use "auto qos voip trust" command on the trunk to your
3750 siwtch.
you can go through this link for more details.
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_19/config/qos.htm
pls give your inputs so we also can learn more... :-)
Thanks,
Swaroop.
>From: "Richard Anderson" <richard.p.anderson@sbcglobal.net>
>Reply-To: "Richard Anderson" <richard.p.anderson@sbcglobal.net>
>To: <ccielab@groupstudy.com>
>Subject: QOS Problem
>Date: Wed, 25 Aug 2004 22:45:15 -0700
>
>What is the recommended QOS settings for Cisco IP Phones.
>
>If all of the IP Phones belong to one VLAN then one simply enable
>
>mls qos
>mls qos trust cos on all interfaces, but what the approach should be if
>there is a layer III switch such as 4507 which is doing intervlan routing
>for multiple Voice VLANS.
>
>I have a 4507 switch which is configured for 3 voice vlans and also doing
>routing for these three voice vlans. Each floor has 3750 switch uplinked
>to
>4507 switch. I am having an issue with voice quality as well as Phone A
>can
>hear Phone B, but Phone B can't hear Phone A
>
>On 3750, I have configured
>
>mls qos
>
>interface x
>mls qos trust cos.
>
>What should be on 4507 switch.
>
>Urgent help needed.
>
>Thanks,
>
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Regards,
Swaroop.
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