Dell Force10 C150 Configuration Manual page 798

Classifying VOIP traffic and applying QoS policies
Avoid congestion and give precedence to voice and signaling traffic by classifying traffic based on subnet
and using strict priority and bandwidth weights on egress, as outlined in the steps below.
Figure 36-12
S-Series.
running-config.
Figure 36-12. Classifying VOIP Traffic and Applying QoS Policies for an Office VOIP Deployment
PC
Step Task
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.
2 Create an input policy-map containing all three class-maps,
and assign each class-map a different service queue.
3 Create two input QoS policies, one each for PC data and
voice signaling. Assign a different bandwidth weight to each
policy.
4 Create an output policy map containing both QoS policies,
and assign them to different service queues.
5 Assign a strict priority to unicast traffic in queue 3.
6 Apply the input policy map you created in Step 2 to the
interface connected to the phone, and apply the output
policy map you created in Step 4 to the interface connected
your desired next-hop router.
Figure 36-13 on page 799
running-config.
798 | Power over Ethernet
depicts the topology and shows the configuration for a C-Series. The steps are the same on an
Figure 36-13 on page 799
VLAN 300: Voice Signaling
VLAN 200: Voice
PC data
VLAN 100: Data
IP Phone X
is a screenshot showing some of the steps, above, and the resulting
is a screenshot showing some of the steps and the resulting
Force10#sh run int gi 6/10
!
interface GigabitEthernet 6/10
description "IP Phone X"
no ip address
portmode hybrid
switchport
service-policy input phone-pc
power inline auto
no shutdown
6/10
LLDP-MED advertisements
Force10#sh run lldp
C-Series
protocol lldp
advertise med
advertise med voice 200 6 46
advertise med voice-signaling 300 5 28
no disable
Command
ip access-list
class-map match-any
policy-map-input
service-queue
qos-policy-out
bandwidth-weight
policy-map-out
service-queue
strict-priority
service-policy
Force10#sh run int gi 6/2
!
interface GigabitEthernet 6/2
description "Uplink to E1200"
no ip address
switchport
service-policy output BW
no shutdown
queue 2, bandwidth weight 64
queue 3, strict priority
queue 1, bandwidth weight 8
6/2
E-Series
Command Mode
CONFIGURATION
CLASS-MAP
CONFIGURATION
POLICY-MAP-IN
CONFIGURATION
QOS-POLICY-IN
CONFIGURATION
POLICY-MAP-OUT
CONFIGURATION
INTERFACE