Cisco 3560 QoS

[Scot Hollingsworth]

I have serveral 3560s and wanted to do a simple QoS for different networks.  I understand the bandwidth statement is out and have to use COS/DSCP values. 

Example:

1.1.1.0 network --C3560-S2

                                        \

                                         C3560-S1

                                        /

1.1.2.0 network --C3560-S3

What is the best way to give the 1.1.1.0 network priority over the 1.1.2.0 network?

Any help would be appreciated......

Scot

[mario_kmc]

Hi Scot,

First have a look a the right configuration guide for your IOS version assuming its the 3560 (no X or E). inside each one theres a QoS chapter explaning possibilities and features
http://www.cisco.com/en/US/products/hw/switches/ps5528/products_installation_and_configuration_guides_list.html

Decide which values of CoS/DSCP you want for traffic of each network.

For traffic going from the networks into the "aggregation switches" have each of the switches for the networks mark traffic going in either through a policy-map or a default value on the port(s).

At the aggregation switch you should configure trust on the ports connecting to the switches and queueing will be done at the output port. Make sure each values maps to a different queue.

For traffic in the opposite direction qos would be better configured from the upstream device not shown.

These are general guidelines and exact commands would depend on lots more information.

PS: Don't forget to enable qos. Command: "mls qos"

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[Scot Hollingsworth]

It is a 3560 E.

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