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QoS on Frame Relay

Hi, I'm trying to configure QoS on a frame relay link, and am running short of time (carrier took 8 weeks to provision!).. Can anyone please give me a run down of the easiest way to configure QoS on a 2851 and 3640 (both running IOS 12.4.10) on the frame relay port so that we can classify traffic by src and/or dest IP address, TCP ports or protocol. I have to clasify using DSCP default,af11,af21,af31,af41 and ef values to keep our carrier happy.

I have been doing some reading, but not making quick enough headway for my project. Any help that can be provided would be greatly appreciated.


Re: QoS on Frame Relay

Hey there,

Easiest way will be to use class-maps and policies, then apply them to the outgoing interface.

Using the class-maps, you can specify the traffic and in the policies set your traffic to ef, af11, etc.

Sorry if I'm teaching you how to suck eggs!

Hope it helps,


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Re: QoS on Frame Relay

You can use modular QoS using class-maps. Below you can find a sample:

Create Classes to match traffic using NBAR or match them according to DF bit etc...

class-map match-all NNTP

match protocol nntp

class-map match-all HTTP

match protocol http

class-map match-all SMTP

match protocol smtp

Create the policy map and assign the bandwidth command

policy-map QoS

class HTTP

bandwidth percent 50

class SMTP

bandwidth percent 20

class NNTP

bandwidth percent 10

class class-default

bandwidth percent 20

Apply the QoS on the interface

interface Ethernet0/0

ip address

service-policy output QoS

Add the below config to the interface configuration to allow QOS to use all bandwidth

max-reserved-bandwidth 100


R1#show policy-map interface ethernet0/0

R1#show queueing interface ethernet0/0

Make sure you enable Cisco CEF.

Please if you find the above helpful,


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