HowTo Configure FC/PFC on Brocade VDX6740 (NOS 5)

Version 2

    This post shows the steps to configure the Brocade VDX6740 switch (NOS 5.0.1) with link-level Flow Control and PFC.

    Image result for VDX6740

    References

     

    Configuration

    1. Perform initial configuration to the switch. You can follow Brocade documentation or check this video.

     

    In this example, we will use port 1/0/49 (40GbE).

     

    2. Login to the switch.

     

    3. Check the current flow control configuration. Run:

    sw0# show qos flowcontrol interface fortygigabitethernet 1/0/49

    Interface FortyGigabitEthernet 1/0/49

      Mode Off

     

    4. Enter to the interface configuration mode. Run:

    sw0# configure terminal

    Entering configuration mode terminal

    sw0(config)# interface

    sw0(config)# interface FortyGigabitEthernet 1/0/49

    sw0(conf-if-fo-1/0/49)#

     

    5. To configure link level flow control. Run:

    sw0(conf-if-fo-1/0/49)# qos flowcontrol tx on rx on

     

    Exit the interface configuration mode and check the flow control configuration and status counters. Run:

    sw0# show qos flowcontrol interface fortygigabitethernet 1/0/49

    Interface FortyGigabitEthernet 1/0/49

      Mode 802.3x

         TX    RX         TX Output Paused    RX

      Admin Admin     Frames  512 BitTimes     Frames

      -----------------------------------------------

         On    On          4             0          0

     

    6. To configure PFC on priority 3, run (on the interface configuration mode):

    sw0(conf-if-fo-1/0/49)# qos flowcontrol pfc 3 tx on rx on