[c-nsp] QoS Design Question

[Rodney Dunn]

You can't do it without PE QOS on the last hop PE-CE connection.

If you are *only* getting spoke traffic from a hub (meaning
it's a hub and spoke simulated over a multipoint MPLS/VPN topology)
you could do "per spoke shaping" but that has scale issues.

Rodney

On Thu, Oct 18, 2007 at 08:24:32AM -0400, Patrick Greene wrote:
> You are correct..the topology is 
> 
> hub -- PE -- (mpls) -- PE -- spoke
> 
> If I set a policy on the hub router to guarantee 10Mbps for LOB applications
> outbound towards the MPLS cloud and if I am telling my spoke router to
> guarantee 512Kbps for LOB application outbound towards the MPLS cloud then
> outbound I am all set.  However, for inbound LOB traffic on the spoke router
> the hub (set at 10Mbps) can send more than 512Kbps of LOB traffic and
> consume the T1 inbound.  On my spoke router, should I be setting my
> bandwidth guarantees inbound from the MPLS instead out towards the MPLS?
> 
> Basically I want to gurantee 512Kbps of traffic for LOB apps in and out of
> each spoke.  I don't have subinterfaces at the hub for each site to apply
> policies to so I am stuck with an aggregate policy...or so it seems.
> 
> Am I making sense here?
> 
> 
> Thanks for your input.
> 
> 
> -----Original Message-----
> From: Oliver Boehmer (oboehmer) [mailto:oboehmer at cisco.com] 
> Sent: Thursday, October 18, 2007 3:02 AM
> To: Patrick Greene; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] QoS Design Question
> 
> Patrick Greene <> wrote on Wednesday, October 17, 2007 11:45 PM:
> 
> > Thanks for any contributions here.
> > 
> > 
> > 
> > This is hypothetical and not production.  Assume a single company with
> > hundreds of remote sites.  With today's MPLS environments you have
> > 100's of sites(T1's) coming back into a single physical
> > interface(DS3) on the router. I am applying my QoS policies outbound
> > on my core router interface to manage my 3 classes of traffic:
> > voice,LOB apps, and default.   The voice gets 5Mbps, LOB applications
> > get  10Mbps on and default gets the rest.  The remote sites all have
> > T1's and I allocate 128Kbps to voice, 512MB to Signaling and LOB
> > applications, and default for all other apps.  This too is applied
> > outbound on the serial interface.  How do I keep the default
> > applications from overrunning the INBOUND LOB applications.   Do I
> > need to apply my QoS policy  inbound on the Serial interface instead
> > of outbound? Won't that affect VOIP quality if I don't have outbound
> > policies.  
> 
> not sure if I understand the topology and the problem. Assuming you have
> 
>   hub -- PE -- (mpls) -- PE -- spoke
> 
> you apply outgoing policies on the hub->PE and on the PE->spoke as well
> as on the spoke->PE and PE->hub direction (and obviously within the MPLS
> cloud), you will be able to protect voice, won't you? Not sure what you
> mean by "overrunning the INBOUND LOB"?
> 
> 	oli
> 
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