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Old 02-24-2010, 12:26 AM
ashley ashley is offline
 
Join Date: Jan 2010
Posts: 18
Default QOS assistance

We have a client with 4 sites(SHDSL(878's)) in vrf, and they are having issues with intersite voip.

We have applied egress policy maps on WAN Ints(giving 40% priority to voip device IP's), but ingress traffic is causing problems(users downloading content from internet is consuming all bandwidth - They are wanting us to apply similar qos policies to our PE Ints(Egress), but we are reluctant to do this,as it creates a far too complex/unmanageable PE conf if we are to do this with all clients..

What is the recommended solution here?

Thanks in advance
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Old 02-24-2010, 10:40 AM
Elton Elton is offline
 
Join Date: May 2009
Posts: 20
Default Re: QOS assistance

I'll suggest you to ask your client to enable QoS and apply LLQ on the CE egress interface (CE-PE interface). As you knew, no matter what QoS in your PE inbound interface, if CE outbound packets get drop or high delay, your PE has nothing to do with.
Cisco SHDSL-878 should support LLQ. NetBrain's "design reader" provides you some sample QoS configurations for your reference.
Hope it helps.
Thanks.
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Old 02-25-2010, 09:15 PM
ashley ashley is offline
 
Join Date: Jan 2010
Posts: 18
Default Re: QOS assistance

Thanks - We have clients that require very large acl's for voip/qos, therefore implementing policies for clients on PE would create large/complex config's - Is there a better way to manage this....what do the larger providers do?

We only run 7200's, so would introduced load also be a concern?

BTW, the design reader looks really good.

Last edited by ashley; 02-25-2010 at 09:17 PM.
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Old 02-28-2010, 09:04 PM
Chris Chris is offline
 
Join Date: Jun 2009
Posts: 74
Default Re: QOS assistance

You don't have to implement complex policies at the PE side.
If the customer is properly marking their packets, the PE can implement priority, cbwfq or policing depending upon the agreed QoS markings.

In your case, you mentioned the VoIP support along with internet browsing.

At the customer side, in addition to applying the queueing mechanism on egress - make sure to also mark the packets so when the packet returns the PE can act upon.

At the PE, you would be matching on QoS markings, not on ACLs. For non-business internet browsing, you may consider marking it as CS1 (Scanvenger).
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