UDP traffic Priority over TCP

[dparmar89]

How can i ensure that UDP traffic has priotity over TCP data in a network?

[cadet alain]

Hi,

You must implement QoS in your network.

On cisco routers this is done using MQC syntax like this:

class-map UDP_TRAFFIC

match protocol udp

class-map TCP_TRAFFIC

match protocol tcp

policy-map TRAFFIC_POLICY

class UDP_TRAFFIC

set dscp af31

class TCP_TRAFFIC

set dscp af21

int x/x

service-policy inbound TRAFFIC_POLICY

this will give priority to UDP vs TCP vs all other traffic except control plane traffic which has a higher DSCP value set

Regards.

Alain.

[acampbell]

Hi,

You would need to use something like policmaps(QOS)

You will need to adjust interfaces access-list numbers etc to suit your set up

!

ip access-list 101

permit udp any any

!

ip access-list 102

permit tcp any any

!

!

class-map match-all UDP

match access-group 101

!

!

class-map match-all TCP

match access-group 102

!
policy-map UDP-THEN-TCP

class UDP

    priority percent 30  

class TCP

   bandwidth remaining percent 60

class class-default

   fair-queue

!

!

int fast 0/0

service-policy out UDP-THEN-TCP

!

HTH

Alex