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Catalyst 6500 Series Switch Command Reference—Release8.4
OL-6244-01
Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands set qos drop-threshold
set qos drop-threshold
To program the transmit-queue and receive-queue drop thresholds on all ports in the syst em, use the set
qos drop-threshold command.
set qos drop-threshold 2q2t tx queue q# thr1 thr2
set qos drop-threshold {1q2t | 1q4t | 1p1q4t} rx queue q# thr1 thr2 thr3 thr4
Syntax Description
Defaults If you enable QoS, the following defaults apply:
•Transmit-queue drop thresholds:
–
Queue 1—80%, 100%
–
Queue 2—80%, 100%
•Receive-queue drop thresholds:
–
Queue 1—50%, 60%, 80%, 100% if the port is trusted
–
Queue 2—100%, 100%, 100%, 100% if the port is untrusted
If you disable QoS, the following defaults apply:
•Transmit-queue drop thresholds:
–
Queue 1—100%, 100%
–
Queue 2—100%, 100%
•Receive-queue drop thresholds: queue 1—100%, 100%, 100%, 100%
Command Types Switch command.
Command Modes Privileged.
Usage Guidelines The number preceding the t letter in the port type (2q2t, 1q2t, 1q4t, or 1p1q4t) determines the number
of threshold values the hardware supports. For example, with 2q2t and 1q2t, the number of thresholds
specified is two; with 1q4t and 1p1q4t, the number of thresholds specified is four. Due to the granularity
of programming the hardware, the values set in hardware will be c los e a ppr oxim ations of the values
provided.
2q2t tx Specifies the transmit-queue drop threshold.
1q2t | 1q4t |
1p1q4t rx Specifies the receive-queue drop threshold.
queue q# Specifies the queue; valid values are 1 and 2.
thr1, thr2, thr3,
thr4 Threshold percentage; valid values are from 1 to 100.