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Feq questions about QOS

I have few questions about QOS

1) Can qos policy only be applied at incoming frame/packets or it can also be applied at outgoing frames?

2)Is it correct that qos policy for incoming frames , will decide the queue the frames be at placed ingress port?

3) Is it correct that qos policy for outgoing frames,decides the queue the frames be placed at egress port?

4) Is it possible to trust the Cos/dscp in frame/packet and have qos policy for outgoing frames ?

5) Scenario:

When f0/1 is in trunk mode:

sw1(config)# int f0/1

sw1(cofig-if)mls qos trust dscp

when switch receives the frame,will it drive the cos value from dscp-cos map and place the frame in appropiate queue?

When f0/1 is not access mode:

When a switch receives the frame , Would switch drive the cos value from DScp-cos map even though the port is in access mode and place the frame in appropiate queue at ingress port?

thanks a lot!

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Feq questions about QOS

Check out the SRND for QoS, it will answer of the questions you've posted here.

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book.html

Hope that helps.

1 REPLY

Re: Feq questions about QOS

Check out the SRND for QoS, it will answer of the questions you've posted here.

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book.html

Hope that helps.

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