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Community Member

Shape Output Traffic 2821

Hi All

I have a Cisco 2821 with ios Version 12.4(21). On that router I have a WAN link that is 550mbit dual.

The interface is 1000FD so i need to shape my output traffic to max 550mbit - otherwise my ISP policing is dropping the traffic.

I've looked at this document http://www.cisco.com/en/US/docs/ios/12_0/qos/configuration/guide/qcgts.html and i'm trying to use this interface command:

traffic-shape rate

But the router wont accept rate value 550000000 that should be 550mbit in bits/s

Is it not possible to shape the traffic to 550mbit on the 2821 router?

Best Regards,

Steffen

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Shape Output Traffic 2821

Your current traffic rate is  16Mbps , below the rate where shaping is triggered ( 550Mbps ).

The output is correct.

Dan

10 REPLIES

Re: Shape Output Traffic 2821

Hi ,

You can try using class based shaping :

policy-map WAN

class class-default

   shape average percent 55

int gix/x

service-policy out WAN

Dan

Community Member

Re: Shape Output Traffic 2821

HI Dan

That seems to Work. The 55 percent: Is that 55% of the speed or bandwidth command on the interface?

/Steffen

Re: Shape Output Traffic 2821

Hi Steffen,

Is the percent of the bandwidth command ( in your case also the speed of the interface ).

You can verify it with

show int x/x | i BW

Dan

Community Member

Re: Shape Output Traffic 2821

interface GigabitEthernet0/0

description Esbjerg-1 WAN

bandwidth 550000

ip address 172.20.1.1 255.255.255.0

ip route-cache flow

duplex full

speed 1000

service-policy output WAN-SHAPE

My Bandwidth is actually set to 550mbit - its the link speed that is set to 1000mbit. So with this shapeing, in need to set that bandwidth to 1000 as well as the speed right?

Re: Shape Output Traffic 2821

Or set the shaping percent to 100.

also you can hardcode the value.

shape average 550000000

Dan

Community Member

Re: Shape Output Traffic 2821

Ha Ha of course... :-)

Community Member

Re: Shape Output Traffic 2821

Why is it saying "shaping no" when showing the policy map for my interface?

Re: Shape Output Traffic 2821

Your current traffic rate is  16Mbps , below the rate where shaping is triggered ( 550Mbps ).

The output is correct.

Dan

Community Member

Re: Shape Output Traffic 2821

Thank You!

Re: Shape Output Traffic 2821

With pleasure.

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