HP 6125G HP 6125G & 6125G/XG Blade Switches Security Command Reference - Page 284

mac-forced-forwarding server

Page 284 highlights

system-view [Sysname] interface gigabitethernet 1/0/1 [Sysname-GigabitEthernet1/0/1] mac-forced-forwarding network-port mac-forced-forwarding server Syntax mac-forced-forwarding server server-ip& View undo mac-forced-forwarding server [ server-ip& ] VLAN view Default level 2: System level Parameters server-ip&: Specifies the IP address of a server in the network. & means you can specify up to ten server IP addresses in one command line. Description Use mac-forced-forwarding server to specify the IP addresses of servers. Use undo mac-forced-forwarding server to remove the specified or all server IP addresses. By default, no server IP address is specified. You can use this command (in either manual or automatic MFF operating mode) to specify the IP address of a DHCP server, the IP address of a server providing some other service, or the real IP address of a VRRP group. If the MFF device receives an ARP request from a server, it will search the IP-to-MAC address entries it has stored, and reply the corresponding MAC address to the server. In this way, packets from a server to a host are not forwarded by the gateway, but packets from a host to a server are forwarded by the gateway. MFF does not check whether the IP address of a server is on the same network segment as that of a gateway, but it checks whether the IP address of a server is all-zero or all-one. An all-zero or all-one server IP address is invalid. If no server IP address is specified using this command, clients cannot communicate with any server. Check that MFF is enabled before executing the mac-forced-forwarding server command. If no IP address is specified in the undo mac-forced-forwarding server command, all specified server IP addresses are removed. Examples # Specify the server at 192.168.1.100. system-view [Sysname] vlan 1 [Sysname-vlan1] mac-forced-forwarding server 192.168.1.100 275

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275
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] mac-forced-forwarding network-port
mac-forced-forwarding server
Syntax
mac-forced-forwarding server
server-ip
&<1-10>
undo mac-forced-forwarding server
[
server-ip
&<1-10> ]
View
VLAN view
Default level
2: System level
Parameters
server-ip
&<1-10>: Specifies the IP address of a server in the network. &<1-10> means you can specify up
to ten server IP addresses in one command line.
Description
Use
mac-forced-forwarding server
to specify the IP addresses of servers.
Use
undo mac-forced-forwarding server
to remove the specified or all server IP addresses.
By default, no server IP address is specified.
You can use this command (in either manual or automatic MFF operating mode) to specify the IP address
of a DHCP server, the IP address of a server providing some other service, or the real IP address of a
VRRP group.
If the MFF device receives an ARP request from a server, it will search the IP-to-MAC address entries it has
stored, and reply the corresponding MAC address to the server. In this way, packets from a server to a
host are not forwarded by the gateway, but packets from a host to a server are forwarded by the
gateway.
MFF does not check whether the IP address of a server is on the same network segment as that of a
gateway, but it checks whether the IP address of a server is all-zero or all-one. An all-zero or all-one server
IP address is invalid.
If no server IP address is specified using this command, clients cannot communicate with any server.
Check that MFF is enabled before executing the
mac-forced-forwarding server
command.
If no IP address is specified in the
undo mac-forced-forwarding server
command, all specified server IP
addresses are removed.
Examples
# Specify the server at 192.168.1.100.
<Sysname> system-view
[Sysname] vlan 1
[Sysname-vlan1] mac-forced-forwarding server 192.168.1.100