Configure Enhanced Transmission SelectionETS provides a way to optimize bandwidth allocation to outbound 802.1p classes of converged Ethernet traffic.Different traffic types have different service needs. Using ETS, you can create groups within an 802.1p priority class to configure differenttreatment for traffic with different bandwidth, latency, and best-effort needs.For example, storage traffic is sensitive to frame loss; interprocess communication (IPC) traffic is latency-sensitive. ETS allows differenttraffic types to coexist without interruption in the same converged link by:• Allocating a guaranteed share of bandwidth to each priority group.• Allowing each group to exceed its minimum guaranteed bandwidth if another group is not fully using its allotted bandwidth.Creating an ETS Priority GroupAn ETS priority group specifies the range of 802.1p priority traffic to which a QoS output policy with ETS settings is applied on an egressinterface. Before configuring ETS, use the cam-acl l2acl 2 ipv4acl 0 ipv6acl 0 ipv4qos 2 l2qos 0 l2pt 0ipmacacl 0 vman-qos 0 fcoeacl 2 etsacl 1 iscsi 2 command to allocate the appropriate CAM region for ETS.1 Configure a DCB Map.CONFIGURATION modedcb-map dcb-map-nameThe dcb-map-name variable can have a maximum of 32 characters.2 Create an ETS priority group.CONFIGURATION modepriority-group group-num {bandwidth bandwidth | strict-priority} pfc offThe 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 Configure the 802.1p priorities for the traffic on which you want to apply an ETS output policy.PRIORITY-GROUP modepriority-list valueThe 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 configuration mode.PRIORITY-GROUP modeexit5 Repeat Steps 1 to 4 to configure 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_numData Center Bridging (DCB) 263
