How do we see DSCP marking in Wireless

[Edward.g]

Hi all ,

My company has just implemented wireless QoS . Critical services has been applied as Platinum .Now , we need to test if the DSCP markings are per expectations or not . Like : DSCP "EF" and "AF" markings.

I have been searching cisco documents from sometime but no luck . Can anyone help me out here , I need to see the DCSP EF and AF markings from wireless perspective .

Thanks in advance .

Regards 

Edward

[RichardAtkin]

https://www.wireshark.org/

^^ This is the only way to be 100% sure.

Alternatively, if you mean you want to check out the config assocaited with QoS mappings, see here for details;

https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/quality_of_service.html

[Edward.g]

Thank you Richard 

As mentioned ,I guess wireshark is the only way 

Regards 

Ed

[Rasika Nayanajith]

Hi Edward,

You have to check end-to-end QoS settings to ensure it is preserved across the path. Below may given an idea

https://mrncciew.com/2013/01/08/byod-with-qos/

Over the air capture is required to see what QoS value you seen in wireless frames.

If you get 5520/8540 with AireOS 8.2.x or above, you can get DSCP value as part of netflow data. So you can monitor that field specifically.

https://mrncciew.com/2018/02/20/wlc-netflow-with-extrahop/

From wired side, you can do that using captures & also using a netflow analysis tool

HTH

Rasika

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[Edward.g]

Hi Rasika ,

Thank you for the suggestions . My WLC is 5508 with Version 8.3.143.0

If Netflow is useful here , we do have Cisco Stealthwatch , will this be of any help to get the wireless DSCP for the marked traffic ?

Regards 

Ed

[Rasika Nayanajith]

Hi Ed,

Though 5508 does not support enhanced netflow, it got IP_DSCP as one field out of 10 fields in its netflow records.

https://mrncciew.com/2016/12/19/wlc-netflow-with-aireos-8-2/

Not sure stealthwatch support that flow format & you can get it analyzed. Give it a try & see

HTH

Rasika

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