Reference Guide

798 | Quality of Service
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Port-based QoS Configurations
You can configure the following QoS features on an interface:
• Set dot1p Priorities for Incoming Traffic
• Configure Port-based Rate Policing
• Configure Port-based Rate Limiting
• Configure Port-based Rate Shaping
• Quality of Service
Set dot1p Priorities for Incoming Traffic
Change the priority of incoming traffic on the interface using the command dot1p-priority from
INTERFACE mode, as shown in the output example below. FTOS places traffic marked with a priority in
a queue based on Table 44-2, "dot1p-priority values and queue numbers," in Quality of Service. If you set
a dot1p priority for a port-channel, all port-channel members are configured with the same value. You
cannot assign a dot1p value to an individual interfaces in a port-channel.
FTOS#config
FTOS(conf)#interface gigabitethernet 1/0
FTOS(conf-if)#switchport
FTOS(conf-if)#dot1p-priority 1
FTOS(conf-if)#end
FTOS#
FTOS Behavior:
- Setting dot1p priorities on ingress traffic is supported only on physical port and port-channel
interfaces; it is not supported on VLAN interfaces.
- The C-Series and S-Series distribute eight dot1p priorities across four data queues. This is different
from the E-Series, which distributes eight dot1p priorities across eight queues (Table 44-2,
"dot1p-priority values and queue numbers," in Quality of Service).
Table 44-2. dot1p-priority values and queue numbers
dot1p
E-Series Queue
Number
C-Series Queue
Number
S-Series Queue
Number
02 1 1
10 0 0
21 0 0
33 1 1
44 2 2
55 2 2
66 3 3
77 3 3