After a few days of searching the Internet for a simple template and example of VOIP QoS implamntation without any results I have decided to write KB on how to implement VOIP Q0S on a Cisco router between two offices \ sites.
This example is ready to use however you need to find which protocol your VoIp telephone system is using (in this example i used MITEL 3000)
once you find it all you have to do is fill it in and paste the code to to both routers.
If you happy with the policy map names leave it as it is, and don’t forget to apply the policy to the right interface.
The commands with explanations:
class-map match-all Voice
match ip dscp 46 —- Remember to put the right protocol number. (46 is for MITEL)
class-map match-all signalling — this name can be change
match ip dscp 26 —- Remember to put the right protocol number. (26 is for MITEL)
policy-map voip — this name can be change
class Voice — this name need to match class-map match-all
bandwidth percent 30 — percent for voice
class signalling — this name need to match class-map match-all�
bandwidth percent 5 —— percent for signalling
class class-default
fair-queue
interface gi0/1 —- Apply Policy Map to Interface
service-policy output Voip
To monitor the traffic and see that everything is working type:
show policy-map interface gi0/0
The commands without explanations and ready to be copied:
class-map match-all Voice
match ip dscp 46
class-map match-all signalling
match ip dscp 26
policy-map voip
class Voice
bandwidth percent 30
class signalling
bandwidth percent 8
class class-default
fair-queue
interface gi0/1
service-policy output Voip
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