Supermicro SSE-G2252, User Manual

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Chapter 37: Class of Service Commands
Priority Commands (Layer 2)
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37 C
LASS OF
S
ERVICE
C
OMMANDS
The commands described in this section allow you to specify which data
packets have greater precedence when traffic is buffered in the switch due
to congestion. This switch supports CoS with eight priority queues for each
port. Data packets in a port’s high-priority queue will be transmitted before
those in the lower-priority queues. The default priority can be set for each
interface, also the queue service mode and the mapping of frame priority
tags to the switch's priority queues can be configured.
P
RIORITY
C
OMMANDS
(L
AYER
2)
This section describes commands used to configure Layer 2 traffic priority
on the switch.
queue mode
This command sets the scheduling mode used for processing each of the
class of service (CoS) priority queues. The options include strict priority,
Weighted Round-Robin (WRR), or a combination of strict and weighted
queuing. Use the no form to restore the default value.
S
YNTAX
queue mode { strict | wrr | strict-wrr [ queue-type-list ]}
Table 37-1: Priority Commands
Command Group Function
Priority Commands
(Layer 2)
Configures the queue mode, queue weights, and default priority
for untagged frames
Priority Commands
(Layer 3 and 4)
Sets the default priority processing method (CoS or DSCP), maps
priority tags for internal processing, maps values from internal
priority table to CoS values used in tagged egress packets for
Layer 2 interfaces, maps internal per hop behavior to hardware
queues
Table 37-2: Priority Commands (Layer 2)
Command Function Mode
queue mode Sets the queue mode to Weighted Round-Robin
(WRR), strict priority, or a combination of strict and
weighted queuing
GC
queue weight Assigns round-robin weights to the priority queues GC
switchport priority default Sets a port priority for incoming untagged frames IC
show interfaces
switchport
Displays the administrative and operational status of
an interface
PE
show queue mode Shows the current queue mode PE
show queue weight Shows weights assigned to the weighted queues PE