Force10 Networks S2410s manual Classofservice dot1p-mapping, Userpriority range is

classofservice dot1p-mapping

By default, SFTOS 2.4.1 configures all egress queues in weighted round robin mode with equal minimum bandwidths. This means that no egress queue will be given priority over any other. To change this, in weighted round robin mode, use the cos-queuemin-bandwidthcommand to assign minimum bandwidths to each queue. You should then see queue 3 get the appropriate share of the bandwidth. Alternatively, use the cos-queue strict command to force strict priority mode, which will give egress queue 3 absolute priority over all other queues.

By default, bandwidth is divided into 28 slices (we get 28 by adding 1 through 7— representing seven priority queues), and then it is allocated so that the highest priority queue gets the most bandwidth. When you use a CoS command to assign a priority queue, you set the priority from 0 to 6 (highest priority).

Note: Honoring 802.1p bits is enabled by default. 802.1p honoring can be disabled with no classofservice trust (in either Global Config and Interface Config modes).

Table 22 Default CoS Queue Prioritization

	Fraction (%) of Total
Queue	Bandwidth
0	1/28 (3.57%)
1	2/28 (7.14%)
2	3/28 (10.71%)
3	4/28 (14.28%)
4	5/28 (17.86%)
5	6/28 (21.43%)
6	7/28 (25%)

classofservice dot1p-mapping

	This command maps an 802.1p priority to an internal traffic class.
Syntax	classofservice dot1p-mapping userpriority trafficclass
	The userpriority range is 0-7.
	The trafficclass range is 0-3.
	The no form of this command is not supported.
Modes	Global Config; Interface Config; Interface Range, which is indicated by the
	(conf-if-range-interface)# prompt, such as (conf-if-range-vlan 10-20)#.

276 Quality of Service (QoS) Commands