ARP MAD-enabled IRF configuration example

Network requirements

As shown in Figure 16, set up a four-chassis IRF fabric in the enterprise network.

Configure ARP MAD in the IRF fabric and use the links connected to Device E for transmitting ARP MAD packets.
To prevent loops, run the spanning tree feature between Device E and the IRF fabric.

Figure 16: Network diagram

Configuration procedure

Configure Device A:

# Shut down the physical interfaces used for IRF links. This example uses Ten-GigabitEthernet 1/0/49 to Ten-GigabitEthernet 1/0/52 for IRF links.

<Sysname> system-view
[Sysname] interface range ten-gigabitethernet 1/0/49 to ten-gigabitethernet 1/0/52
[Sysname-if-range] shutdown
[Sysname-if-range] quit

# Bind Ten-GigabitEthernet 1/0/49 and Ten-GigabitEthernet 1/0/50 to IRF-port 1/1.

[Sysname] irf-port 1/1
[Sysname-irf-port1/1] port group interface ten-gigabitethernet 1/0/49
[Sysname-irf-port1/1] port group interface ten-gigabitethernet 1/0/50
[Sysname-irf-port1/1] quit

# Bind Ten-GigabitEthernet 1/0/51 and Ten-GigabitEthernet 1/0/52 to IRF-port 1/2.

[Sysname] irf-port 1/2
[Sysname-irf-port1/2] port group interface ten-gigabitethernet 1/0/51
[Sysname-irf-port1/2] port group interface ten-gigabitethernet 1/0/52
[Sysname-irf-port1/2] quit

# Bring up the physical interfaces and save the configuration.

[Sysname] interface range ten-gigabitethernet 1/0/49 to ten-gigabitethernet 1/0/52
[Sysname-if-range] undo shutdown
[Sysname-if-range] quit
[Sysname] save

# Activate the IRF port configuration.

[Sysname] irf-port-configuration active

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 16, and log in to Device B. This example uses Ten-GigabitEthernet 2/0/49 to Ten-GigabitEthernet 2/0/52 for IRF links.

# Shut down the physical interfaces.

<Sysname> system-view
[Sysname] interface range ten-gigabitethernet 2/0/49 to ten-gigabitethernet 2/0/52
[Sysname-if-range] shutdown
[Sysname-if-range] quit

# Bind Ten-GigabitEthernet 2/0/51 and Ten-GigabitEthernet 2/0/52 to IRF-port 2/1.

[Sysname] irf-port 2/1
[Sysname-irf-port2/1] port group interface ten-gigabitethernet 2/0/51
[Sysname-irf-port2/1] port group interface ten-gigabitethernet 2/0/52
[Sysname-irf-port2/1] quit

# Bind Ten-GigabitEthernet 2/0/49 and Ten-GigabitEthernet 2/0/50 to IRF-port 2/2.

[Sysname] irf-port 2/2
[Sysname-irf-port2/2] port group interface ten-gigabitethernet 2/0/49
[Sysname-irf-port2/2] port group interface ten-gigabitethernet 2/0/50
[Sysname-irf-port2/2] quit

# Bring up the physical interfaces and save the configuration.

[Sysname] interface range ten-gigabitethernet 2/0/49 to ten-gigabitethernet 2/0/52
[Sysname-if-range] undo shutdown
[Sysname-if-range] quit
[Sysname] save

# Activate the IRF port configuration.

[Sysname] irf-port-configuration active

Device A and Device B perform master election, and the one that has lost the election reboots to form an IRF fabric with the master.

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 16, and log in to Device C. This example uses Ten-GigabitEthernet 3/0/49 to Ten-GigabitEthernet 3/0/52 for IRF links.

# Shut down the physical interfaces.

<Sysname> system-view
[Sysname] interface range ten-gigabitethernet 3/0/49 to ten-gigabitethernet 3/0/52
[Sysname-if-range] shutdown
[Sysname-if-range] quit

# Bind Ten-GigabitEthernet 3/0/51 and Ten-GigabitEthernet 3/0/52 to IRF-port 3/1.

[Sysname] irf-port 3/1
[Sysname-irf-port3/1] port group interface ten-gigabitethernet 3/0/51
[Sysname-irf-port3/1] port group interface ten-gigabitethernet 3/0/52
[Sysname-irf-port3/1] quit

# Bind Ten-GigabitEthernet 3/0/49 and Ten-GigabitEthernet 3/0/50 to IRF-port 3/2.

[Sysname] irf-port 3/2
[Sysname-irf-port3/2] port group interface ten-gigabitethernet 3/0/49
[Sysname-irf-port3/2] port group interface ten-gigabitethernet 3/0/50
[Sysname-irf-port3/2] quit

# Bring up the physical interfaces and save the configuration.

[Sysname] interface range ten-gigabitethernet 3/0/49 to ten-gigabitethernet 3/0/52
[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.

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 16, and log in to Device D. This example uses Ten-GigabitEthernet 4/0/49 to Ten-GigabitEthernet 4/0/52 for IRF links.

# Shut down the physical interfaces.

<Sysname> system-view
[Sysname] interface range ten-gigabitethernet 4/0/49 to ten-gigabitethernet 4/0/52
[Sysname-if-range] shutdown
[Sysname-if-range] quit

# Bind Ten-GigabitEthernet 4/0/49 and Ten-GigabitEthernet 4/0/50 to IRF-port 4/1.

[Sysname] irf-port 4/1
[Sysname-irf-port4/1] port group interface ten-gigabitethernet 4/0/49
[Sysname-irf-port4/1] port group interface ten-gigabitethernet 4/0/50
[Sysname-irf-port4/1] quit

# Bind Ten-GigabitEthernet 4/0/51 and Ten-GigabitEthernet 4/0/52 to IRF-port 4/2.

[Sysname] irf-port 4/2
[Sysname-irf-port4/2] port group interface ten-gigabitethernet 4/0/51
[Sysname-irf-port4/2] port group interface ten-gigabitethernet 4/0/52
[Sysname-irf-port4/2] quit

# Bring up the physical interfaces and save the configuration.

[Sysname] interface range ten-gigabitethernet 4/0/49 to ten-gigabitethernet 4/0/52
[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.

Configure ARP MAD on the IRF fabric:

# Enable the spanning tree feature globally. Map the ARP MAD VLAN to MSTI 1 in the MST region.

<Sysname> system-view
[Sysname] stp global enable
[Sysname] stp region-configuration
[Sysname-mst-region] region-name arpmad
[Sysname-mst-region] instance 1 vlan 3
[Sysname-mst-region] active region-configuration
[Sysname-mst-region] quit

# Configure the IRF fabric to change its bridge MAC address as soon as the address owner leaves.

[Sysname] undo irf mac-address persistent

# Set the domain ID of the IRF fabric to 1.

[Sysname] irf domain 1

# Create VLAN 3, and assign GigabitEthernet 1/0/2, GigabitEthernet 2/0/1, GigabitEthernet 3/0/2, and GigabitEthernet 4/0/1 to VLAN 3.

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

# Create VLAN-interface 3, assign it an IP address, and enable ARP MAD on the interface.

[Sysname] interface vlan-interface 3
[Sysname-Vlan-interface3] ip address 192.168.2.1 24
[Sysname-Vlan-interface3] mad arp enable
You need to assign a domain ID (range: 0-4294967295)
 [Current domain is: 1]:
 The assigned  domain ID is: 1

Configure Device E as the intermediate device:
CAUTION:
If the intermediate device is also in an IRF fabric, assign the two IRF fabrics different domain IDs for correct split detection. False detection causes IRF split.
# Enable the spanning tree feature globally. Map the ARP MAD VLAN to MSTI 1 in the MST region.
```
<DeviceE> system-view
[DeviceE] stp global enable
[DeviceC] stp region-configuration
[DeviceC-mst-region] region-name arpmad
[DeviceC-mst-region] instance 1 vlan 3
[DeviceC-mst-region] active region-configuration
[DeviceC-mst-region] quit
```
# Create VLAN 3, and assign ports GigabitEthernet 1/0/1, GigabitEthernet 1/0/2, GigabitEthernet 1/0/3, and GigabitEthernet 1/0/4 to VLAN 3 for forwarding ARP MAD packets.
```
[DeviceE] vlan 3
[DeviceE-vlan3] port gigabitethernet 1/0/1 to gigabitethernet 1/0/4
[DeviceE-vlan3] quit
```

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