Users Guide

• EXEC Privilege
Command History
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S4810 and S6000 platforms.
9.3(0.0) Introduced on the FC Flex IO module installed in the MXL 10/40GbE Switch.
Usage Information
Use the show qos dcb-map command to display the enhanced transmission selection (ETS) and priority-
based ow control (PFC) parameters used to congure server-facing Ethernet ports. S5000 Ethernet ports
are DCBx-enabled by default.
The following table describes the show qos dcb-map output shown in the example below.
Field Description
State Complete: All mandatory DCB parameters are correctly congured. In progress: The
DCB map conguration is not complete. Some mandatory parameters are not
congured.
PFC Mode PFC conguration in DCB map: On (enabled) or O.
PG Priority group congured in the DCB map.
TSA Transmission scheduling algorithm used by the priority group: Enhanced
Transmission Selection (ETS).
BW Percentage of bandwidth allocated to the priority group.
PFC PFC setting for the priority group: On (enabled) or O.
Priorities 802.1p priorities congured in the priority group.
Example
Dell# show qos dcb-map dcbmap2
State :Complete
PfcMode:ON
--------------------
PG:0 TSA:ETS BW:50 PFC:OFF
Priorities:0 1 2 4 5 6 7
PG:1 TSA:ETS BW:50 PFC:ON
Priorities:3
dcb pfc-shared-buer-size
Congure the maximum amount of shared buer size for PFC packets in kilobytes.
You must congure the shared buer size to be less than the total PFC buer size. If the buer size and DCB buer threshold
settings are applied on one or more ports, a validaiton is performed to determine whether following condition is satised: Shared-pfc-
buer-size <= (Total-pfc-buer-size - Σpfc priority <> buer-size on each port, priority).
If the preceding condition is not satised by the shared PFC buer size value, the conguration is not saved and a system logging
message is generated stating that the shared buer size that you attempt to specify cannot be congured because of the existing
Data Center Bridging (DCB)
501