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To classify VoIP trac and apply QoS policies for an oce VoIP deployment, use the following commands:
1 Create three standard or extended access-lists, one each for voice, voice signaling, and PC data, and place each in its own match-any
class-map.
CONFIGURATION mode or CLASS-MAP mode
ip access-list or class-map match-any
2 Create an input policy-map containing all three class-maps and assign each class-map a dierent service queue.
CONFIGURATION mode or POLICY-MAP-IN mode
policy-map-input or service-queue
3 Create two input QoS policies, one each for PC data and voice signaling. Assign a dierent bandwidth weight to each policy.
CONFIGURATION mode or QOS-POLICY-IN mode
qos-policy-out or bandwidth-weight
4 Create an output policy map containing both QoS policies and assign them to dierent service queues.
CONFIGURATION mode or POLICY-MAP-OUT mode
policy-map-out or service-queue
5 Assign a strict priority to unicast trac in queue 3.
CONFIGURATION mode
strict-priority
6 Apply the input policy map you created in Step 2 to the interface connected to the phone. Apply the output policy map you created in
Step 4 to the interface connected your desired next-hop router.
INTERFACE mode
service-policy
Example of the sh run acl command.
Dell#sh run acl
!
ip access-list extended pc-subnet
seq 5 permit ip 201.1.1.0/24 any
!
ip access-list extended phone-signalling
seq 5 permit ip 192.1.1.0/24 host 192.1.1.1
!
ip access-list extended phone-subnet
seq 5 permit ip 192.1.1.0/24 any
Dell#sh run class-map
!
class-map match-any pc-subnet
match ip access-group pc-subnet
!
class-map match-any phone-signalling
match ip access-group phone-signalling
!
class-map match-any phone-subnet
match ip access-group phone-subnet
Dell#sh run policy-map-input
!
policy-map-input phone-pc
service-queue 1 class-map pc-subnet
service-queue 2 class-map phone-signalling
service-queue 3 class-map phone-subnet
Dell#sh run qos-policy-output
!
qos-policy-output data
Power over Ethernet (PoE)
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