Quality of Service on Cisco 2940

[bayates826]

Hello,

I just acquired a Cisco 2940-8TF-S 10 port switch and I'm just messing around with it right now.   I will probably be using it to study a little bit on, but  for now I'm confused on what it supports and the different IOS versions for it.

It had the image c2940-i6q4l2-mz.121-22.EA8 on it which I updated to c2940-i6k2l2q4-mz.121-22.EA14 right away.  The first thing I wanted to do with it was try out some QoS, but I found that the class-map command is unrecognized. I have looked through some documentation and from what I can tell qos should be supported.   I went through a 2940 qos configuration guide which included the commands like class-map, policy-map, etc.  I can't find anything that says this switch doesn't support qos so I'm wondering if it has something to do with the image.

So does this particular model not support QoS or is there something else I need to do in order to have these features?  I apologize, I'm a newbie when it comes to the hardware versions, software versions, feature sets, etc.  I pretty much only know about the basic configuration part.

Thanks!

[paul driver · Accepted solution]

Hello

I guess its just a basic qos support

QUALITY OF SERVICE

Q. Does the Cisco Catalyst 2940 Series support the appropriate quality of service (QoS) mechanisms to enable voice, video, and data applications?

A. Yes, for basic voice, video, and data applications. The switches support four queues per port, allowing network administrators to choose from four different service levels for each type of network traffic. Using the 802.1p class of service (CoS) value in the packet header, Cisco Catalyst 2940 Series Switches can place different types of traffic into different prioritized queues. Queue priorities can be configured using Strict Priority or Weighted Round Robin scheduling. When running voice over the network, it is better to use Strict Priority scheduling; if there is a mix of video and data applications, Weighted Round Robin scheduling is generally preferred.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12-1_22_ea11/command/reference/cr/cli3.html

res

Paul

[bayates826]

I found a command reference for my model and commands such as class-map and policy-map are not in there.  Looks like the only thing I can do with it is queuing and CoS marking.  The configuration documentation is confusing as it shows you can configure QoS like I'm used to in there.

[Joseph W. Doherty]

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Posting

If I remember correctly, some of the 29xx series came as -S (for standard features) and -E (for enhanced features), your switch might be the -S type; often "advanced" QoS were only found on the -E models, and even those "advanced" QoS features might not encompass what you'll find on newer switch series.