Qos details

[subhojithalder198]

Hi

Having 1 query on Qos

In between switch-router , we have 1G port & we are plan to do Qos implementation.

We are plan to allocate 400M B/w ( exceeding 400M will drop the traffic) for voice traffic in 1G Uplink 

My query is : Assuming 400M voice path is full, so the traffic will drop or when 1G ( Entire Physical interface ) Interface will fully utilized then traffic will drop

Also what are the main criteria/prerequisite needs to check when we try to deploy Qos for VOIP traffic

[Joseph W. Doherty]

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Posting

It depends on how you're doing the 400 Mbps VoIP policing.  Many router implementations of LLQ will only police when there's interface congestion.  Explicit policers, though, will always police as the defined value.

Main criteria for VoIP is generally avoid delaying it or dropping it.  So, for example, on routers VoIP often is placed into a LLQ class and on switches a PQ class.

[subhojithalder198]

Hi

Incase I am doing shaping & policing - what will be the priority. I think Shaping will coe 1st till the time Policer rate reached

Pls confirm

[Joseph W. Doherty · Accepted solution]

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

Sorry, don't understand you comment.  Normally when mixing policers and shapers, priority would depend on how your policy is structured.

[subhojithalder198]

Hi

Incase I am doing shaping & policing both on same interface- what will be the priority. I think Shaping will come first until the B/w near to full utilized , then Policer do his work

Please share some example also for the same