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QoS assistance

Dear Netpro,

Wondering if someone could point me in the right direction of some material to assist me with my QoS configuration.

We have implemented a VoIP solution across our 5 remote sites and now need to configure our routers to support QoS.

Each site has a 2 Mbps link that carries two vlans, I have already rate-limited the configuration to groom traffic before it goes across the link, but wondering if someone could help me grow this configuration to support VoIP traffic marked with DSCP value of 40.

Here is a extract from one of the site configs.

interface FastEthernet0/0.880

description *** CONNECTION BETWEEN ***

bandwidth 2000

encapsulation dot1Q 880

ip address 172.16.31.10 255.255.255.252

no ip redirects

ip accounting access-violations

ip bandwidth-percent eigrp 100 90

rate-limit output 2000000 2000000 2000000 conform-action transmit exceed-action drop

!

interface FastEthernet0/0.881

description *** ***

bandwidth 1999

encapsulation dot1Q 881

ip address 172.16.32.10 255.255.255.252

no ip redirects

ip accounting access-violations

ip bandwidth-percent eigrp 100 90

rate-limit output 2000000 2000000 2000000 conform-action transmit exceed-action drop

end

Thanks in advance.

Regards, Adrian.

1 REPLY
Hall of Fame Super Silver

Re: QoS assistance

Have you read the Cisco QoS SRND document at www.cisco.com/go/srnd it is pretty good.

What is your topology, what kind of access do you have to the remote sites?

If you want to limit traffic with DSCP of 40, you can use policy-map with policer, for example:

policy-map VoIP

class VVLAN-VOICE

set ip dscp 46 ! DSCP EF (Voice)

police 128000 8000 exceed-action drop

Chris

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