Dell Emulex Family of Adapters - Manual (Page 739)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
Appendix E. RoCE Switch Support
DCBX-Enabled Switch Connection PFC Mode
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6. Configure a valid VLAN with an ID other than 0 or 1.
7. Ensure that Jumbo Frames is enabled, or at minimum set the MTU >= 4200.
8. Specify each switch port service policy rather than using the system QoS.
Notes:
• Some switches have jumbo frame size support disabled on the port and global level
by default.
• Some switches show the priority for FCoE on the switch itself. Use a policy with
zero bandwidth for the FCoE priority.
Host—Client Configuration
For all host and clients participating in the network:
1. Create VLAN using the VLAN ID you configured in step 6 above.
2. Assign appropriate IP address to the VLAN interface.
Note: Ensure all the traffic is flowing through the vlan interface.
DCBX-Disabled Switch Connection (Generic Pause Mode)
1. Host Configuration:
a. On the host and peer systems, ensure that Tx pause flow control and Rx pause
flow control are enabled on all the ports and interfaces which are RoCE enabled
using operating system standard tools.
2. Switch Configuration:
a. Enable Tx generic pause flow control and Rx generic pause flow control on each
port participating in the cluster.
b. Enable Jumbo Frames, or set the MTU to at least 4200 or greater.
Note: Some switches have jumbo frame size support disabled on the port and
global level by default.
Examples for Cisco Switch
Sample Class-maps for RoCE on a Cisco Switch
Note: Not all switch settings are shown.
Cisco5548UP2(config)# show class-map
Type qos class-maps
===================
class-map type qos match-any class-fcoe
match cos 3
class-map type qos match-all class-roce
match cos 5
class-map type qos match-any class-default