Configuring PFC parameters
To prevent packets with an 802.1p priority value from being dropped, enable PFC for the 802.1p priority value. This feature reduces the sending rate of packets carrying this priority when network congestion occurs.
The device uses PFC parameters to negotiate with the server adapter and to enable PFC for the specified 802.1p priorities on the server adapter.
To configure PFC parameters:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter Layer 2 Ethernet interface view. | interface interface-type interface-number | N/A |
3. Enable the Ethernet interface to automatically negotiate with its peer to decide whether to enable PFC. | priority-flow-control auto | By default, PFC is disabled. To advertise the PFC data, you must enable PFC in auto mode. |
4. Enable PFC for the specified 802.1p priorities. | priority-flow-control no-drop dot1p dot1p-list | By default, PFC is disabled for all 802.1p priorities. As a best practice, enable PFC for the 802.1p priority of FCoE traffic. If you enable PFC for multiple 802.1p priorities, packet loss might occur during periods of congestion. |
5. Configure the interface to trust the 802.1p priority carried in packets. | qos trust dot1p | By default, the port priority of the incoming port is trusted. |
For more information about the priority-flow-control and priority-flow-control no-drop dot1p commands, see Interface Command Reference.