Reference Guide

Quality of Service | 595

• Status indicates whether or not the specified policy-map can be completely applied to an interface in

the port-pipe.

• Allowed indicates that the policy-map can be applied because the estimated number of CAM

entries is less or equal to the available number of CAM entries. The number of interfaces in the

port-pipe to which the policy-map can be applied is given in parenthesis.

• Exception indicates that the number of CAM entries required to write the policy-map to the CAM

is greater than the number of available CAM entries, and therefore the policy-map cannot be

applied to an interface in the specified port-pipe.

Figure 30-16. test cam-usage Command Example

Viewing QoS CAM Entries

Viewing QoS CAM Entries is supported only on platform e

• View Layer 2 QoS CAM entries using the command show cam layer3-qos from EXEC Privilege mode.

• View Layer 3 QoS CAM entries using the command

show cam layer2-qos from EXEC Privilege mode.

Configure Quality of Service for an Office VOIP

Deployment

Configure Quality of Service for an Office VOIP Deployment is supported on platforms c s

There are multiple ways you can use QoS to map ingress phone and PC traffic so that you can give them

each a different quality of service.

Honor the incoming DSCP value

On both the C-Series or S-Series, if you know traffic originating from the phone is tagged with the DSCP

value of 46 (EF), you might make the associated queue a strict priority queue, as shown in Figure 30-17;

on the C-Series and S-Series, FTOS maps DSCP 46 to queue 2 (see Table 30-5 on page 585 in the QoS

chapter.)

Note: The command show cam-usage provides much of the same information as test cam-usage, but

whether or not a policy-map can be successfully applied to an interface cannot be determined without first

measuring how many CAM entries the policy-map would consume; the command

test cam-usage is useful

because it provides this measurement.

FTOS# test cam-usage service-policy input pmap_l2 linecard 0 port-set 0

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0 0 L2ACL 500 200 Allowed(2)