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You can specify a server’s IP address in either manual or automatic MFF mode. The server can be a
DHCP server, a server providing some other service, or the real IP address of a VRRP standby group.
After you specify a server’s IP address and then an ARP request from the server is received, the MFF
device will search the IP-to-MAC address entries it has stored, and reply with the corresponding MAC
address to the server. As a result, packets from a host to a server are forwarded by the gateway, but
packets from a server to a host are not forwarded by the gateway.
To specify the IP addresses of servers:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter VLAN view.
vlan vlan-id N/A
3. Specify the IP addresses of
servers.
mac-forced-forwarding server
server-ip&<1-10>
No server IP address is specified by
default.
Displaying and maintaining MFF
Task Command
Remarks
Display MFF port configuration
information.
display mac-forced-forwarding interface [ |
{ begin | exclude | include }
regular-expression ]
Available in any view
Display the MFF configuration
information of a specified VLAN.
display mac-forced-forwarding vlan vlan-id
[ | { begin | exclude | include }
regular-expression ]
Available in any view
MFF configuration examples
Auto-mode MFF configuration example in a tree network
Network requirements
As shown in Figure 131, all the devices are in VLAN 100. Host A, Host B, and Host C obtain IP addresses
from the DHCP server. They are isolated at Layer 2, and can communicate with each other through the
gateway. MFF automatic mode is enabled on Switch A and Switch B.
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