Foundry Configuration Guide for the FESX, FSX, and FWSX
13 - 14 © Foundry Networks, Inc. December 22, 2005
Command Syntax
To change the bandwidth percentages for the queues, enter commands such as the following. Note that this
example uses the default queue names.
Syntax: [no] qos profile <queue> <percentage> <queue> <percentage> <queue> <percentage>
<queue> <percentage> <q
ueue> <percentage> <q
ueue> <percentage> <queue> <percentage> <queue> <percentage>
Each <queue> parameter specifies the name of a queue. You can specify the queues in any order on the
command line, but you must specify each queue.
The <percentage> parameter specifies a number for the percentage of the device’s outbound bandwidth that is
allocated to the queue. The FESX, FSX, and FWSX QoS queues require a minimum bandwidth percentage of 3%
for each priority. When jumbo frames are enabled, the minimum bandwidth requirement is 8%. If these minimum
values are not met, QoS may not be accurate.
Configuration Notes
• The total of the percentages you enter must equal 100.
• The FESX, FSX, and FWSX do not adjust the bandwidth percentages you enter. BigIron QoS does adjust the
bandwidth percentages to ensure that each queue has at least its required minimum bandwidth percentage.
• When sFlow is enabled, the FESX, FSX, and FWSX support seven priorities instead of eight. When sFlow is
enabled, Priority 1 is not used. Any values assigned to queue 1 will be directed to queue 0.
Changing the Bandwidth Allocations
NOTE: This feature is supported in releases 02.2.00 and later.
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.
FESX424 Switch(config)#qos profile qosp7 sp qosp6 sp qosp5 20 qosp4 16 qosp3 16
qosp2 16 qosp1 16 qosp0 16
Syntax: [no] qos profile <queue 7> sp <queue 6> sp | <percentage> <queue 5> <percentage> <queue 4>
<percentage> <queue 3> <percentage> <queue 2> <percentage> <queue 1> <percentage> <queue 0>
<percentage>]
Each <queue x> parameter specifies the name of a queue. 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 only, queue 6 supports
both strict priority and WRR queuing mechanisms, and queues 0 – 5 support the WRR queuing mechanism only.
The sp parameter configures strict priority as the queuing mechanism. Note that only queue 7 and queue 6
support this method.
The <percentage> parameter configures WRR as the queuing mechanism and specifies the percentage of the
device’s outbound bandwidth allocated to the queue. The queues require a minimum bandwidth percentage of
FESX424 Switch(config)# qos profile qosp7 25 qosp6 15 qosp5 12 qosp4 12 qosp3 10
qosp2 10 qosp1 10 qosp0 6
Profile qosp7 : Priority7 bandwidth requested 25% calculated 25%
Profile qosp6 : Priority6 bandwidth requested 15% calculated 15%
Profile qosp5 : Priority5 bandwidth requested 12% calculated 12%
Profile qosp4 : Priority4 bandwidth requested 12% calculated 12%
Profile qosp3 : Priority3 bandwidth requested 10% calculated 10%
Profile qosp2 : Priority2 bandwidth requested 10% calculated 10%
Profile qosp1 : Priority1 bandwidth requested 10% calculated 10%
Profile qosp0 : Priority0 bandwidth requested 6% calculated 6%
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