Hub/Switch Configuration Guide

284 Quality of Service (QoS) Commands
tail-drop queue-parms
Mode
Privileged Exec
Report Fields Interface — This displays the slot/port of the interface. If displaying the global configuration, this output
line is replaced with a Global Config indication.
The following information is repeated for each queue on the interface.
Queue IdQueue identification number — An interface supports n queues numbered 0 to (n-1). The
number n is platform dependent and corresponds to the number of supported queues (traffic classes).
The following information is repeated for each drop precedence level defined for the
preceding Queue ID.
Drop Precedence Level — The drop precedence level for this queue, from 1 to p. The specific pvalue is
platform-dependent.
Tail Drop Threshold — The tail drop queue threshold value for this drop precedence level, expressed in
sixteenths of the overall device queue size (e.g., 0/16, 1/16, 2/16…, 16/16). This is a configured value.
Command
History
tail-drop queue-parms
This command sets the tail drop threshold parameter for each drop precedence level
supported by a queue (four queues in SFTOS 2.4.1). The
no form of this command restores
the default values for the queue tail drop threshold parameters.
Syntax
[no] tail-drop queue-parms queue-id-1 [queue-id-2 … queue-id-n] threshold 0-16
0-16 0-16
Mode
Global Config and Interface Config
Command
History
Version 2.4.1 Introduced
Related
Commands
random-detect queue-parms Set the decay exponent used by the WRED average queue depth
calculation for the interface.
tail-drop queue-parms sets the tail drop threshold parameter for each drop precedence
level supported by a queue (four queues in SFTOS 2.4.1).
Parameters
queue-id-1 [queue-id-2
…
queue-id-n]
Enter a queue ID from 0 to 3. Enter from one ID up to four.
Range: 0 to 3
threshold 0-16 0-16
0-16
Enter the keyword threshold, followed by the desired threshold for
the specified queues.
Range: 1 to 16
Version 2.4.1 Introduced
Related
Commands
show interfaces
tail-drop-threshold
Display the tail-drop threshold configuration for each supported drop
precedence level of each queue for the specified interface.