QoS

[Bob Greer]

Hi there,

Thanks for reading.

I'm looking to prioritize voip and business traffic.  Can you please comment on my configuration?

class-map match-any A-traffic

match dscp ef

class-map match-any B-traffic

match dscp af43

match dscp af31

match dscp cs3

class-map match-any mark_voip

match protocol h323

class-map match-any mark_Business

match access-group name mark_Business

!

policy-map Leo

class A-traffic

priority percent 50

class B-traffic

bandwidth percent 30

class class-default

fair-queue 256

queue-limit 256 packets

policy-map marking

class mark_voip

set dscp ef

class mark_Business

set dscp af43

ip access-list extended mark_Business

permit ip any 10.1.50.0 0.0.0.255

permit ip any host 10.1.96.159

permit ip any host 10.1.97.57

My questions are 1) Do I apply queueing only on egress and 2) is the MARKING policy ignored if I apply service-policy Leo to an interface and 3) am I on the right track: is this appropriate in general to prioritize voip & business traffic?

Thanks!

Bob

[Joseph W. Doherty]

1) Do I apply queueing only on egress

Yes, queuing polices will not "take" if configured as ingress policies.

2) is the MARKING policy ignored if I apply service-policy Leo to an interface

That depends.  Your marking policy can be used for ingress or egress, and you can have both, but only one of each, on an interface.  I.e. on one interface you can have marking or Leo for egress and/or marking for ingress.

3) am I on the right track: is this appropriate in general to prioritize voip & business traffic?

Generally, VoIP bearer traffic needs service guarantees.  "Business" traffic, might be given some guarantee over non-"business" traffic, but personally I often recommend FQ for any/all traffic except for traffic that really needs/deserves special treatment, such as, again, VoIP bearer traffic.