BFD MAD-enabled IRF configuration example

As shown in Figure 15, set up a four-chassis IRF fabric at the core layer of the enterprise network.

• Configure BFD MAD in the IRF fabric and set up BFD MAD links between each member device and the intermediate device.

• Disable the spanning tree feature on the ports used for BFD MAD, because the two features conflict with each other.

1. Configure Device A:

   # Shut down the physical interfaces used for IRF links. This example uses FortyGigE 1/0/1 to FortyGigE 1/0/4 for IRF links.

   <Sysname> system-view
   [Sysname] interface range FortyGigE 1/0/1 to FortyGigE 1/0/4
   [Sysname-if-range] shutdown
   [Sysname-if-range] quit 
   

   # Bind FortyGigE 1/0/1 and FortyGigE 1/0/2 to IRF-port 1/1.

   [Sysname] irf-port 1/1
   [Sysname-irf-port1/1] port group interface FortyGigE 1/0/1
   [Sysname-irf-port1/1] port group interface FortyGigE 1/0/2
   [Sysname-irf-port1/1] quit
   

   # Bind FortyGigE 1/0/3 and FortyGigE 1/0/4 to IRF-port 1/2.

   [Sysname] irf-port 1/2
   [Sysname-irf-port1/2] port group interface FortyGigE 1/0/3
   [Sysname-irf-port1/2] port group interface FortyGigE 1/0/4
   [Sysname-irf-port1/2] quit
   

   # Bring up the QSFP+ ports and save the configuration.

   [Sysname] interface range FortyGigE 1/0/1 to FortyGigE 1/0/4
   [Sysname-if-range] undo shutdown
   [Sysname-if-range] quit
   [Sysname] save
   

   # Activate the IRF port configuration.

   [Sysname] irf-port-configuration active
   

2. Configure Device B:

   # Change the member ID of Device B to 2 and reboot the device to validate the change.

   <Sysname> system-view
   [Sysname] irf member 1 renumber 2
   Renumbering the member ID may result in configuration change or loss. Continue? [Y/N]:y
   [Sysname] quit
   <Sysname> reboot
   

   # Connect Device B to Device A as shown in Figure 15, and log in to Device B. This example uses FortyGigE 2/0/1 to FortyGigE 2/0/4 for IRF links.

   # Shut down the physical interfaces.

   <Sysname> system-view
   [Sysname] interface range FortyGigE 2/0/1 to FortyGigE 2/0/4
   [Sysname-if-range] shutdown
   [Sysname-if-range] quit 
   

   # Bind FortyGigE 2/0/3 and FortyGigE 2/0/4 to IRF-port 2/1.

   [Sysname] irf-port 2/1
   [Sysname-irf-port2/1] port group interface FortyGigE 2/0/3
   [Sysname-irf-port2/1] port group interface FortyGigE 2/0/4
   [Sysname-irf-port2/1] quit
   

   # Bind FortyGigE 2/0/1 and FortyGigE 2/0/2 to IRF-port 2/2.

   [Sysname] irf-port 2/2
   [Sysname-irf-port2/2] port group interface FortyGigE 2/0/1
   [Sysname-irf-port2/2] port group interface FortyGigE 2/0/2
   [Sysname-irf-port2/2] quit
   

   # Bring up the QSFP+ ports and save the configuration.

   [Sysname] interface range FortyGigE 2/0/1 to FortyGigE 2/0/4
   [Sysname-if-range] undo shutdown
   [Sysname-if-range] quit
   [Sysname] save
   

   # Activate the IRF port configuration.

   [Sysname] irf-port-configuration active
   

   The two devices perform master election, and the one that has lost the election reboots to form an IRF fabric with the master.

3. Configure Device C:

   # Change the member ID of Device C to 3 and reboot the device to validate the change.

   <Sysname> system-view
   [Sysname] irf member 1 renumber 3
   Renumbering the member ID may result in configuration change or loss. Continue? [Y/N]:y
   [Sysname] quit
   <Sysname> reboot
   

   # Connect Device C to Device A as shown in Figure 15, and log in to Device C. This example uses FortyGigE 3/0/1 to FortyGigE 3/0/4 for IRF links.

   # Shut down the physical interfaces.

   <Sysname> system-view
   [Sysname] interface range FortyGigE 3/0/1 to FortyGigE 3/0/4
   [Sysname-if-range] shutdown
   [Sysname-if-range] quit 
   

   # Bind FortyGigE 3/0/3 and FortyGigE 3/0/4 to IRF-port 3/1.

   [Sysname] irf-port 3/1
   [Sysname-irf-port3/1] port group interface FortyGigE 3/0/3
   [Sysname-irf-port3/1] port group interface FortyGigE 3/0/4
   [Sysname-irf-port3/1] quit
   

   # Bind FortyGigE 3/0/1 and FortyGigE 3/0/2 to IRF-port 3/2.

   [Sysname] irf-port 3/2
   [Sysname-irf-port3/2] port group interface FortyGigE 3/0/1
   [Sysname-irf-port3/2] port group interface FortyGigE 3/0/2
   [Sysname-irf-port3/2] quit
   

   # Bring up the QSFP+ ports and save the configuration.

   [Sysname] interface range FortyGigE 3/0/1 to FortyGigE 3/0/4
   [Sysname-if-range] undo shutdown
   [Sysname-if-range] quit
   [Sysname] save
   

   # Activate the IRF port configuration.

   [Sysname] irf-port-configuration active
   

   Device C reboots to join the IRF fabric.

4. Configure Device D:

   # Change the member ID of Device D to 4 and reboot the device to validate the change.

   <Sysname> system-view
   [Sysname] irf member 1 renumber 4
   Renumbering the member ID may result in configuration change or loss. Continue? [Y/N]:y
   [Sysname] quit
   <Sysname> reboot
   

   # Connect Device D to Device B and Device C as shown in Figure 15, and log in to Device D. This example uses FortyGigE 4/0/1 to FortyGigE 4/0/4 for IRF links.

   # Shut down the physical interfaces.

   <Sysname> system-view
   [Sysname] interface range FortyGigE 4/0/1 to FortyGigE 4/0/4
   [Sysname-if-range] shutdown
   [Sysname-if-range] quit 
   

   # Bind FortyGigE 4/0/1 and FortyGigE 4/0/2 to IRF-port 4/1.

   [Sysname] irf-port 4/1
   [Sysname-irf-port4/1] port group interface FortyGigE 4/0/1
   [Sysname-irf-port4/1] port group interface FortyGigE 4/0/2
   [Sysname-irf-port4/1] quit
   

   # Bind FortyGigE 4/0/3 and FortyGigE 4/0/4 to IRF-port 4/2.

   [Sysname] irf-port 4/2
   [Sysname-irf-port4/2] port group interface FortyGigE 4/0/3
   [Sysname-irf-port4/2] port group interface FortyGigE 4/0/4
   [Sysname-irf-port4/2] quit
   

   # Bring up the QSFP+ ports and save the configuration.

   [Sysname] interface range FortyGigE 4/0/1 to FortyGigE 4/0/4
   [Sysname-if-range] undo shutdown
   [Sysname-if-range] quit
   [Sysname] save
   

   # Activate the IRF port configuration.

   [Sysname] irf-port-configuration active
   

   Device D reboots to join the IRF fabric. A four-chassis IRF fabric is formed.

5. Configure BFD MAD on the IRF fabric:

   # Create VLAN 3, and add FortyGigE 1/0/5, FortyGigE 2/0/5, FortyGigE 3/0/5, and FortyGigE 4/0/5 to VLAN 3.

   [Sysname] vlan 3
   [Sysname-vlan3] port FortyGigE 1/0/5 FortyGigE 2/0/5 FortyGigE 3/0/5 FortyGigE 4/0/5
   [Sysname-vlan3] quit
   

   # Create VLAN-interface 3, and configure a MAD IP address for each member device on the VLAN interface.

   [Sysname] interface vlan-interface 3
   [Sysname-Vlan-interface3] mad bfd enable
   [Sysname-Vlan-interface3] mad ip address 192.168.2.1 24 member 1
   [Sysname-Vlan-interface3] mad ip address 192.168.2.2 24 member 2
   [Sysname-Vlan-interface3] mad ip address 192.168.2.3 24 member 3
   [Sysname-Vlan-interface3] mad ip address 192.168.2.4 24 member 4
   [Sysname-Vlan-interface3] quit
   

   # Disable the spanning tree feature on FortyGigE 1/0/5, FortyGigE 2/0/5, FortyGigE 3/0/5, and FortyGigE 4/0/5.

   [Sysname] interface range FortyGigE 1/0/5 FortyGigE 2/0/5 FortyGigE 3/0/5 FortyGigE 4/0/5
   [Sysname-if-range] undo stp enable
   [Sysname-if-range] quit
   

6. Configure Device E as the intermediate device:

   	CAUTION: If the intermediate device is also an IRF fabric, assign the two IRF fabrics different domain IDs for correct split detection. False detection causes IRF split.

   # Create VLAN 3, and assign FortyGigE 1/0/1, FortyGigE 1/0/2, FortyGigE 1/0/3, and FortyGigE 1/0/4 to VLAN 3 for forwarding BFD MAD packets.

   <DeviceE> system-view
   [DeviceE] vlan 3
   [DeviceE-vlan3] port FortyGigE 1/0/1 to FortyGigE 1/0/4
   [DeviceE-vlan3] quit