Concept Guide

ETS Prerequisites and Restrictions
The following prerequisites and restrictions apply when you congure ETS bandwidth allocation or queue scheduling.
• Conguring ETS bandwidth allocation or a queue scheduler for dot1p priorities in a priority group is applicable if the DCBx version used
on a port is CIN (refer to Conguring DCBx).
• When allocating bandwidth or conguring a queue scheduler for dot1p priorities in a priority group on a DCBx CIN interface, take into
account the CIN bandwidth allocation (refer to Conguring Bandwidth Allocation for DCBx CIN) and dot1p-queue mapping.
NOTE: The IEEE 802.1Qaz, CEE, and CIN versions of ETS are supported.
Creating an ETS Priority Group
An ETS priority group species the range of 802.1p priority trac to which a QoS output policy with ETS settings is applied on an egress
interface.
1 Congure a DCB Map.
CONFIGURATION mode
dcb-map dcb-map-name
The dcb-map-name variable can have a maximum of 32 characters.
2 Create an ETS priority group.
CONFIGURATION mode
priority-group group-num {bandwidth bandwidth | strict-priority} pfc off
The range for priority group is from 0 to 7.
Set the bandwidth in percentage. The percentage range is from 1 to 100% in units of 1%.
Committed and peak bandwidth is in megabits per second. The range is from 0 to 40000.
Committed and peak burst size is in kilobytes. Default is 50. The range is from 0 to 10000.
3 Congure the 802.1p priorities for the trac on which you want to apply an ETS output policy.
PRIORITY-GROUP mode
priority-list value
The range is from 0 to 7.
The default is none.
Separate priority values with a comma. Specify a priority range with a dash. For example, priority-list 3,5-7.
4 Exit priority-group conguration mode.
PRIORITY-GROUP mode
exit
5 Repeat Steps 1 to 4 to congure all remaining dot1p priorities in an ETS priority group.
6 Specify the dot1p priority-to-priority group mapping for each priority.
priority-pgid dot1p0_group_num dot1p1_group_num ...dot1p7_group_num
Priority group range is from 0 to 7. All priorities that map to the same queue must be in the same priority group.
Data Center Bridging (DCB)
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