Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 43)

for each priority. When jumbo frames are enabled, the minimum bandwidth requirement is 8 percent. If
these minimum values are not met, QoS may not be accurate.
Configuration notes for changing the bandwidth
• The total of the percentages you enter must equal 100.
• FastIron devices do not adjust the bandwidth percentages you enter.
Bandwidth allocations of the hybrid WRR and SP queues
NOTE
On the SX-FI48GPP interface module, the bandwidth percentages for 8 to 4 queue mapping for hybrid
WRR and SP queues are different from other Brocade SX modules. For more information on 8 to 4
queue mapping on the SX-FI48GPP interface module, refer to the “Default scheduling configuration for
the SX-FI48GPP module” section.
To change the default bandwidth percentages for the queues when the device is configured to use the
combined SP and WRR queuing mechanism, enter commands such as the following. Note that this
example uses the default queue names.
device(config)#qos profile qosp7 sp qosp6 sp qosp5 20 qosp4 16 qosp3 16 qosp2 16
qosp1 32 qosp0 sp qosp1 16 qosp0 16
Syntax: [no] qos profile name7 { sp | percentage } name6 { sp | percentage } name5 { sp |
percentage } name4 { sp | percentage } name3 { sp | percentage } name2 { sp | percentage } name1 {
sp | percentage } name0 { sp | percentage }
Each queuespecifies the name of a queue, such as 7, 6, 5, 4, 3, 2, 1, and 0. You can specify the
queues in any order on the command line, but you must specify each queue. Note that queue 7
supports Strict Priority (sp) only, queue 6 supports both SP and WRR queuing mechanisms (sp |), and
queues 0 through 5 support the WRR queuing mechanism only.
NOTE
Brocade stackable devices that are operating as members of a stack reserve queue 7 for stacking
functions.
The sp parameter configures strict priority as the queuing mechanism. Note that only queue 7 and
queue 6 support this method.
The percentage variable configures WRR as the queuing mechanism and specifies the percentage of
the device outbound bandwidth allocated to the queue. The queues require a minimum bandwidth
percentage of 3 percent for each priority. When jumbo frames are enabled, the minimum bandwidth
requirement is 8 percent. If these minimum values are not met, QoS may not be accurate.
NOTE
The percentages must add up to 100. The Brocade FastIron devices do not adjust the bandwidth
percentages you enter.
Viewing QoS settings
To display the QoS settings for all of the queues, enter the show qos-profiles command.
Configuration notes for changing the bandwidth
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