Solved: Auto QoS

sugatada9 · ‎08-12-2014

Guys,

as I know Auto QoS is best fitted at pure Cisco environment and for VoIP. Can you please let me know what are the limitations of Auto QoS and what are deployment scenarios?

Where we shall avoid deployment of Auto QoS?

Joseph W. Doherty · ‎08-25-2014

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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

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Posting

I don't recall coming across a single link that well explains the Auto QoS models and where the different versions are supported (i.e. in which platforms and/or IOSs).

Additionally, I believe, some Auto Qos versions use the same basic QoS but revise things like buffer settings.

Basically, Auto QoS implementations, I also believe, were thought by Cisco to be the "best" at the time they were released. As QoS thinking changes, and Cisco obtains field usage feedback, Cisco "improves" the implementations. (NB: Cisco's "best" BTW isn't the same as the latest RFC "best".)

I can only suggest you search the Cisco web site for information on Auto QoS, and for whatever you find, take note of when the document was produced and references to the various Qos models Cisco has endorsed over the years.

PS:

I've looked at Cisco's Auto QoS implementations to see what Cisco thinks what QoS should be, to see how their thinking on QoS might differ from mine, but I always roll-my-own to insure it doesn't change with IOS upgrades (and it's tailored for my QoS needs).

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Joseph W. Doherty · ‎08-13-2014

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

The original version of AutoQoS was aimed at VoIP, but later versions attempt to support the full QoS model that Cisco endorses.

The limitations of AutoQoS, is it supports a model which may or may not be suitable for your traffic.

If your traffic would benefit using its supported model, its deployment is much simplier than manual QoS configurations (especially on switches with lots of ports).

sugatada9 · ‎08-24-2014

Hi Joseph,

Can you please elaborate a little or give me a link on the Auto QoS model and where Auto QoS supports and where it doesn't support the traffic?

Joseph W. Doherty · ‎08-25-2014

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

I don't recall coming across a single link that well explains the Auto QoS models and where the different versions are supported (i.e. in which platforms and/or IOSs).

Additionally, I believe, some Auto Qos versions use the same basic QoS but revise things like buffer settings.

Basically, Auto QoS implementations, I also believe, were thought by Cisco to be the "best" at the time they were released. As QoS thinking changes, and Cisco obtains field usage feedback, Cisco "improves" the implementations. (NB: Cisco's "best" BTW isn't the same as the latest RFC "best".)

I can only suggest you search the Cisco web site for information on Auto QoS, and for whatever you find, take note of when the document was produced and references to the various Qos models Cisco has endorsed over the years.

PS:

I've looked at Cisco's Auto QoS implementations to see what Cisco thinks what QoS should be, to see how their thinking on QoS might differ from mine, but I always roll-my-own to insure it doesn't change with IOS upgrades (and it's tailored for my QoS needs).