Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 469)

Brocade 6910 Ethernet Access Switch Configuration Guide 419
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Chapter
21
Class of Service Commands
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.
Priority Commands (Layer 2)
This section describes commands used to configure Layer 2 traffic priority on the switch.
TABLE 96 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 97 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