Configuring manual-mode MFF in a ring network

As shown in Figure 132, all the devices are in VLAN 100, and the switches form a ring. Hosts A, B, and C are assigned IP addresses manually.

Configure MFF to isolate the hosts at Layer 2 and allow them to communicate with each other with each other through the gateway.

<Gateway> system-view
[Gateway] interface gigabitethernet 1/0/1
[Gateway-GigabitEthernet1/0/1] ip address 10.1.1.100 24

# Enable STP.

[SwitchA] stp enable

# Configure manual-mode MFF.

[SwitchA] vlan 100
[SwitchA-vlan-100] mac-forced-forwarding default-gateway 10.1.1.100

# Specify the IP address of the server.

[SwitchA-vlan-100] mac-forced-forwarding server 10.1.1.200

# Enable ARP snooping.

[SwitchA-vlan-100] arp-snooping enable
[SwitchA-vlan-100] quit

# Configure GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 as network ports.

[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] mac-forced-forwarding network-port
[SwitchA-GigabitEthernet1/0/2] quit
[SwitchA] interface gigabitethernet 1/0/3
[SwitchA-GigabitEthernet1/0/3] mac-forced-forwarding network-port

# Enable STP.

[SwitchB] stp enable

# Configure manual-mode MFF.

[SwitchB] vlan 100
[SwitchB-vlan-100] mac-forced-forwarding default-gateway 10.1.1.100

# Specify the IP address of the server.

[SwitchB-vlan-100] mac-forced-forwarding server 10.1.1.200

# Enable ARP snooping.

[SwitchB-vlan-100] arp-snooping enable
[SwitchB-vlan-100] quit

# Configure GigabitEthernet 1/0/4 and GigabitEthernet 1/0/6 as network ports.

[SwitchB] interface gigabitethernet 1/0/4
[SwitchB-GigabitEthernet1/0/4] mac-forced-forwarding network-port
[SwitchB-GigabitEthernet1/0/4] quit
[SwitchB] interface gigabitethernet 1/0/6
[SwitchB-GigabitEthernet1/0/6] mac-forced-forwarding network-port

<SwitchC> system-view
[SwitchC] stp enable