Users Guide

7–RoCE Configuration
Preparing the Ethernet Switch
131 AH0054602-00 M
Configuring the Dell Z9100 Ethernet Switch for RoCE
Configuring the Dell Z9100 Ethernet Switch for RoCE comprises configuring a DCB map
for RoCE, configuring priority-based flow control (PFC) and enhanced transmission
selection (ETS), verifying the DCB map, applying the DCB map to the port, verifying PFC
and ETS on the port, specifying the DCB protocol, and assigning a VLAN ID to the switch
port.
To configure the Dell switch:
1. Create a DCB map.
Dell# configure
Dell(conf)# dcb-map roce
Dell(conf-dcbmap-roce)#
2. Configure two ETS traffic classes in the DCB map with 50 percent
bandwidth assigned for RoCE (group 1).
Dell(conf-dcbmap-roce)# priority-group 0 bandwidth 50 pfc off
Dell(conf-dcbmap-roce)# priority-group 1 bandwidth 50 pfc on
3. Configure the PFC priority to match the adapter traffic class priority number
(5).
Dell(conf-dcbmap-roce)# priority-pgid 0 0 0 0 0 1 0 0
4. Verify the DCB map configuration priority group.
Dell(conf-dcbmap-roce)# do show qos dcb-map roce
-----------------------
State :Complete
PfcMode :ON
--------------------
PG:0 TSA:ETS BW:40 PFC:OFF
Priorities:0 1 2 3 4 6 7
PG:1 TSA:ETS BW:60 PFC:ON
Priorities:5
NOTE
For instructions on configuring a Dell Z91000 switch port to connect to
the 41xxx Series Adapter at 25Gbps, see “Dell Z9100 Switch
Configuration” on page 298.