WAN QoS

[chrisdamore]

I am working with a customer who is experiencing voice quality issues when Exchange replication is enabled or large files are moved from one site to another.

This customer has four sites all connected by 10Mbps fiber leased from a local service provider.

QoS is configured on all of the routers but I need to know how to configure shaping to limit the data traffic so it doesn't saturate the links...

Thank you,

[gatlin007]

A problem with shaping the traffic is that during periods of low VoIP traffic the data traffic won't have the ability to use the entire circuit.

If you decrease the queue-limit on the data class it should cause the data traffic to scale down faster and stop it from adversely impacting the VoIP traffic.


Chris

[Mahesh Gohil]

Hi chris,

In addition to what chris said if you have voice traffic passing thorugh that interface it is good practice to configure BC value such that

TC should not exceed 10 ms.

Like for 10MB circuit

shape average 10240000 1024000

where 10240000 =CIR , 1024000=BC So tc will be cir/bc=10 msec.

This will avoid packet waiting not more than 10msec in output direction.

Regards

Mahesh