ASA 5505 QoS

Answered Question
Jan 5th, 2010
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I have a Cisco ASA with 8.2 code that has a site to site VPN tunnel to our corporate location.

The data goes to corporate but the VOIP goes to the internet.

The VOIP is a hosted VOIP solution not a corporate hosted solution.

I would like to configure the ASA to give the voip packets a higher priority.

The Voip and data are on the same network.

Thanks for everyone who looked at this thread.

Regards,

Juan

Correct Answer by Panos Kampanakis about 7 years 4 months ago

Also this doc explains how QoS on ASA works using examples


https://supportforums.cisco.com/docs/DOC-1230


PK

Correct Answer by Jon Marshall about 7 years 4 months ago

juan-ruiz wrote:


I have a Cisco ASA with 8.2 code that has a site to site VPN tunnel to our corporate location.

The data goes to corporate but the VOIP goes to the internet.

The VOIP is a hosted VOIP solution not a corporate hosted solution.

I would like to configure the ASA to give the voip packets a higher priority.

The Voip and data are on the same network.

Thanks for everyone who looked at this thread.

Regards,

Juan


Juan


Start with this document as an example -


ASA VOIP QOS


You realise that the Internet does not have any QOS quarantees so all your are doing is prioritizing the packets on the actual ASA ?


Jon

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Correct Answer
Jon Marshall Tue, 01/05/2010 - 14:27
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juan-ruiz wrote:


I have a Cisco ASA with 8.2 code that has a site to site VPN tunnel to our corporate location.

The data goes to corporate but the VOIP goes to the internet.

The VOIP is a hosted VOIP solution not a corporate hosted solution.

I would like to configure the ASA to give the voip packets a higher priority.

The Voip and data are on the same network.

Thanks for everyone who looked at this thread.

Regards,

Juan


Juan


Start with this document as an example -


ASA VOIP QOS


You realise that the Internet does not have any QOS quarantees so all your are doing is prioritizing the packets on the actual ASA ?


Jon

juan-ruiz Wed, 01/06/2010 - 07:10
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Thanks for the contributions.

The challenged I'm faced with is that this is a DSL circuit and the users pull a lot of data from corporate which is affecting VOIP traffic.

I would like to set the priority on the switch or ASA so the VOIP traffic leaves first but it may not matter once it hits the internet.

Panos Kampanakis Wed, 01/06/2010 - 07:16
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  • Cisco Employee,

True, the docs provided you can set prioritization on the ASA for example.


But depending on how oversubscribed the ISP is it might not help.

Most ISPs have enough bandwidth to not cause delays for the majority of the time though.


PK

vilaxmi Wed, 01/06/2010 - 20:12
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  • Cisco Employee,

Hello,


Please be informed of the way QOS policing/prioritizing works on ASA 5505 which is totally different from other ASA platforms due to its SWITCH based architecture.


Since there is only a single backplane between CPU and interfaces, whatever QOS you configure on one interface gets overriden any time you make changes on other interfaces. For eg  if you remove QOS config from one interface it gets removed on ALL (due to single backplane).


Thanks


Vijaya

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