Need a simple QOS configuration for point-to-point metro-e connection.

[chuckwilson]

I have two offices connected over a 300Mb private-line metroethernet circuit. There are servers and users at both offices. The telco handoff ports are 1Gb on each end, therefore my routers "think" that this is a 1G link.

I need a simple QOS policy to apply that will prevent the routers from trying to transmit more than 300M on this link (causing discards by the telco). Of course, some sort of flow control or buffering is preferred over simply dropping packets.

Any ideas? (a quick sample config would be good!)

Thanks

[canero]

How much bandwidth is used by tje servers, i think you are trying to prioritize servers against user traffic
. if the circuit is highly saturated using Waas may help more than Qos configuration,


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[chuckwilson]

I do not wish to proritize, classify or mark traffic at this time. I simply wish to control the data flow from each site to the other so that packets are not discarded by the telco.

The link is 300Mb CIR, but it is on 1Gb port handoff so my routers think it is a 1GB connection

[nickbonifacio]

Hi Chuck,

Shaping might be your best bet in this case.

On to the (rough) config:

!

ip access-list extended ACL_SHAPE

permit ip any any

class-map match-all CM_SHAPE

match access-group name ACL_SHAPE

policy-map PM_SHAPE

class CM_SHAPE

  shape average percent 30 //or use shape average 300000000

int g0/0

service-policy output PM_SHAPE

Remember, you need to do this on the layer 3 interfaces (hopefully routed ports) on both ends.

Then do 'sh policy-map PM_SHAPE' to verify.

Thanks!

Nick

[Joseph W. Doherty]

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Posting

As Nick has also suggested, normally you would want to shape for 300 Mbps.  How that's accomplished depends on your platforms and possibly their IOS versions.

[chuckwilson]

Thanks gentlemen;

Exactly what I was looking for....