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Chapter 11: Deployment Examples CLI
Step 3: Apply QoS on SmartPath AP-1.
1. Create a QoS policy.
For SmartPath APs supporting IEEE 802.11a/b/g:
qos policy voice qos 5 wrr 20000 90
qos policy voice qos 3 wrr 54000 60
For SmartPath APs supporting IEEE 802.11a/b/g/n:
qos policy voice qos 6 strict 512 0
qos policy voice qos 5 wrr 20000 90
qos policy voice qos 3 wrr 1000000 60
By default, a newly created QoS policy attempts to forward traffic mapped to Classes 6 and 7 immediately upon receipt. This
immediate forwarding of received traffic is called "strict" forwarding. To assign strict forwarding to VoIP traffic from phones
whose MAC OUI is mapped to Class 6, you simply retain the default settings for Class 6 traffic on SmartPath APs supporting
802.11a/b/g data rates. For SmartPath APs supporting 802.11n data rates, the default user profile rate is 20,000 kbps for Class 6
traffic, so you change it to 512 kbps.
For Classes 5 and 3, you limit the rate of traffic and set WRR weights so that the SmartPath AP can control how to put the rate-
limited traffic into forwarding queues. You use the default settings for Class 2 traffic.
When you enter any one of the above commands, the SmartPath AP automatically sets the maximum bandwidth for all members
of the user group to which you later apply this policy and the bandwidth for any individual group member. You leave the
maximum traffic rate at the default 54,000 or 1,000,000 kbps—depending on the SmartPath AP model that you are
configuring—for the user group. You also leave the maximum bandwidth for a single user at 54,000 or 1,000,000 kbps, so that
if a single user needs all the bandwidth and there is no competition for it, that user can use it all.
Also by default, the traffic rate for this policy has a weight of 10. At this point, because this is the only QoS policy, the weight is
inconsequential. If there were other QoS policies, then their weights would help determine how the SmartPath AP would allocate
the available bandwidth.
The QoS policy that you define is shown in Figure 11-10. Although you did not configure settings for QoS Classes 0, 1, 2, 4, and
7, the policy applies default settings to them. The SmartPath AP assigns all traffic that you do not specifically map to a class to
Class 2, which uses WRR with a weight of 30 and a default rate of 54,000 or 1,000,000 kbps. Because nothing is mapped to
Classes 0, 1, 4, and 7, their settings are irrelevant.
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