ingress queues,frame placement, in layer 2 switch

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Sep 27th, 2008
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hi every body!

1)i just want to know when a layer 2 switch receives a frame on port, how does it determine in which ingress queue the frame be placed?

is it decided by qos in frame?

thanks a lot!


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Prashanth Krishnappa Sat, 09/27/2008 - 20:55
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Not all platforms support input scheduling but if your switch does, your understanding is correct. It depends on

1)QoS markings on the incoming packet

2)The queue selected depends on cos/dscp to ingress Q map


Here is some documentation(I picked 3750 for example)

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_see/configuration/guide/swqos.html#wp1065146


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