DELL S50V User Manual

|

Quality of Service

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On the C-Series and S-Series all traffic is by default mapped to the same queue, Queue 0. If you honor 
dot1p on ingress, then you can create service classes based the queueing strategy in 

 using the 

command 

 from INTERFACE mode. You may apply this queuing strategy 

globally by entering this command from CONFIGURATION mode.

•

All dot1p traffic is mapped to Queue 0 unless 

 is enabled on an interface or 

globally.

•

Layer 2 or Layer 3 service policies supersede dot1p service classes.

Guarantee a minimum bandwidth to queues globally from CONFIGURATION mode with the command 

. The command is applied in the same way as the bandwidth-weight 

 

command in QOS-POLICY-OUT mode supersedes the 

.

Apply an input policy map to an interface

Apply an input policy map to an interface using the command 

 from INTERFACE 

mode. Specify the keyword 

 if the policy map you are applying a Layer 2 policy map; in this case, the 

INTERFACE must be in switchport mode. You can apply the same policy map to multiple interfaces, and 
you can modify a policy map after you apply it.

•

You cannot apply a class-map and QoS policies to the same interface.

•

You cannot apply an input Layer 2 QoS policy on an interface you also configure with 

.

•

If you apply a service policy that contains an ACL to more than one interface, FTOS uses ACL 
optimization to conserves CAM space. The ACL Optimization behavior detects when an ACL already 
exists in the CAM and rather than writing it to the CAM multiple times.

Create Output Policy Maps

 is supported only on platform 

e

1. Create an output policy map using the command 

 from CONFIGURATION mode.

2. Once you create an output policy map, do one or more of the following:

•

•

•

3. Apply the policy map to an interface. See 

page 61

.

Apply an output QoS policy to queues using the command 

 from INTERFACE mode.