qos profile
qos profile
{
name7
{
sp
|
percentage
} ...
name0
{
sp
|
percentage
}
no qos profile
{
name7
{
sp
|
percentage
} ...
name0
{
sp
|
percentage
}
The eight QoS queues on FastIron devices receive the minimum guaranteed percentages of a port’s total bandwidth, as shown in the following table. Note that the defaults differ when jumbo frames are enabled.
- name
- Specifies the name of a queue. You can specify the queues in any order on the command line, but you must specify each queue.
- percentage
- Specifies the percentage of the device outbound bandwidth that is allocated to the queue. QoS 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.
Global configuration mode
When the queuing method is WRR, the software internally translates the percentages into weights. The weight associated with each queue controls how many packets are processed at a given stage through the weighted round robin algorithm.
Default Minimum Bandwidth Percentages
| Queue | Default minimum percentage of bandwidth | |
|---|---|---|
| Without jumbo frames | With jumbo frames | |
| qosp7 | 75% | 44% |
| qosp6 | 7% | 8% |
| qosp5 | 3% | 8% |
| qosp4 | 3% | 8% |
| qosp3 | 3% | 8% |
| qosp2 | 3% | 8% |
| qosp1 | 3% | 8% |
| qosp0 | 3% | 8% |
The
no form of the command restores the default bandwidth percentages.
The following example changes the bandwidth percentages for the queues.
device(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%