436
[SwitchB-vlan100] mac-forced-forwarding server 10.1.1.200
# Enable ARP snooping on VLAN 100.
[SwitchB-vlan100] arp snooping enable
[SwitchB-vlan100] quit
# Configure GigabitEthernet 1/0/6 as a network port.
[SwitchB] interface gigabitethernet 1/0/6
[SwitchB-GigabitEthernet1/0/6] mac-forced-forwarding network-port
Manual-mode MFF configuration example in a ring network
Network requirements
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
through Gateway at Layer 3.
Figure 132 Network diagram
Configuration procedure
1. Configure the IP addresses of the hosts and Gateway as shown in Figure 132.
2. Configure Switch A:
# Enable STP globally to make sure STP is enabled on interfaces.
[SwitchA] stp global enable
# Configure manual-mode MFF on VLAN 100.
[SwitchA] vlan 100
[SwitchA-vlan100] mac-forced-forwarding default-gateway 10.1.1.100
# Specify the IP address of the server.
[SwitchA-vlan100] mac-forced-forwarding server 10.1.1.200
# Enable ARP snooping on VLAN 100.
[SwitchA-vlan100] arp snooping enable
[SwitchA-vlan100] 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
Switch A
Switch C Gateway
Switch B
GE1/0/5
GE1/0/6
GE1/0/3
GE1/0/1 GE1/0/2
GE1/0/10
GE1/0/8 GE1/0/9
Server
GE1/0/7
GE1/0/4
Host C
10.1.1.3/24
Host B
10.1.1.2/24
Host A
10.1.1.1/24
10.1.1.100/24
10.1.1.200/24
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