operationsIT
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Cisco Router 4321 QOS configuration questions
Hello EE,
I have a 4321 and prior to my starting I was told they had VOIP quality issues. I've been looking through the routers to get my bearings and I see the following:
class-map match-any voice-control
match dscp cs3
class-map match-any voice-bearer
match dscp ef
policy-map wan
class voice-bearer
bandwidth percent 25
class voice-control
bandwidth percent 5
I am wondering if anyone can help me understand what this is really doing as I am looking to expand with making internet best effort, but I don't want to break anything that is there. Though I am still trying to make sure I don't destroy anything
I have a 4321 and prior to my starting I was told they had VOIP quality issues. I've been looking through the routers to get my bearings and I see the following:
class-map match-any voice-control
match dscp cs3
class-map match-any voice-bearer
match dscp ef
policy-map wan
class voice-bearer
bandwidth percent 25
class voice-control
bandwidth percent 5
I am wondering if anyone can help me understand what this is really doing as I am looking to expand with making internet best effort, but I don't want to break anything that is there. Though I am still trying to make sure I don't destroy anything
ASKER
That is awesome thank you for the clarification!
Is there something for example if I want to add a smaller bandwidth or best effort to internet I could reference for these tags like ef and cs3?
Is there something for example if I want to add a smaller bandwidth or best effort to internet I could reference for these tags like ef and cs3?
ASKER
@Ken Boone CCIE #4649 one other question as you say to apply it to an interface.
I see our outside interface shows service-policy output wan
is this accurate given the policy is: policy-map wan
I see our outside interface shows service-policy output wan
is this accurate given the policy is: policy-map wan
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ASKER
Great information thanks
class-map match-any voice-control
match dscp cs3
class-map match-any voice-bearer
match dscp ef
So the above says that anything with a dscp value of cs3 will fall into the class called voice-control and anything that has a dscp value of ef will fall into the class called voice-bearer. So basically we just mapped certain types of traffic to classes so we can do something with them.
policy-map wan
class voice-bearer
bandwidth percent 25
class voice-control
bandwidth percent 5
Now this part creates a policy that says what to do with each class. In this case it says for anything that has been classified as voice-bearer gets 25% of the available bandwidth and any traffic classified as voice-control gets 5% of the available bandwidth.
One the policy has been applied on an interface it would go into effect.
Hope this helps.