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Regular Contributor I
Posts: 179
Registered: ‎12-17-2008

Traffic Shaping and Voice

Would this profile have any undesirable effects on the Voice network, assuming almost all the users are Voice and limits are not being hit?

 

wlan traffic-management-profile "CA-SSID-Priority"
shaping-policy preferred-access
bw-alloc virtual-ap "Employee-vap_prof" share 30 enforcement soft
bw-alloc virtual-ap "POS-vap_prof" share 15 enforcement soft
bw-alloc virtual-ap "Residence-vap_prof" share 10 enforcement soft
bw-alloc virtual-ap "Guest-vap_prof" share 5 enforcement soft
bw-alloc virtual-ap "Voice-vap_prof" share 20 enforcement soft


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ACMA ACMP
Guru Elite
Posts: 20,780
Registered: ‎03-29-2007

Re: Traffic Shaping and Voice

BGC IT,

 

Bandwidth shaping seems like a good idea, but in fact it makes troubleshooting more difficult, because it is artificially manipulating the airtime that clients get.  How much of a client's throughput is being limited by bandwidth contracts, a true congestion issue or bandwidth shaping is impossible to tell.  Properly designed VOIP clients will use WMM to automatically prioritize the traffic over the WLAN, so they do not need this mechanism.  Bandwidth shaping was designed primarily for multi-tenant organizations that need to guarantee specific percentages of bandwidth to their tenants, but if the RF side of your WLAN is not optimized, it could end up reducing bandwidth by constraining traffic to what is left of it.  Merely enabling this does not magically fix anything.

 

I would first attempt to try to fix the RF for all users and then try to narrow down issues to specific clients, instead.

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Regular Contributor I
Posts: 179
Registered: ‎12-17-2008

Re: Traffic Shaping and Voice

Thanks for the general thoughts.

 

Anyone have a specific answer?


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ACMA ACMP
Guru Elite
Posts: 20,780
Registered: ‎03-29-2007

Re: Traffic Shaping and Voice

[ Edited ]

The specific answer is that it could have a negative effect, so you should not do it. Voice should work without traffic shaping.  When you use traffic shaping, you end up penalizing the other traffic and that will decrease your average throughput..



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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