Tripp Lite NGI-M08C4-L2, Owner'S Manual

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6.6 Dual Homing
Dual Homing is a network topology in which a device is connected to the network by way of two
independent access points (points of attachment). One access point is the primary connection,
and the other is a standby connection that is activated in the event of a failure of the primary
connection.
How Dual-Homing Works
Assume the primary connection and secondary connections are connected to Internet by different
way. For example, primary connection is connected to a physical network but secondary
connection is connected to a wireless network. When enable dual homing feature, device will
default connect to Internet by primary connection and secondary connection will be shutdown.
If the port or all ports of primary connection are link-down, the device will replace primary
connection by secondary connection to connect to Internet. At this situation, if secondary
connection is also link-down, device will do nothing. Secondary connection only works as
primary connection disconnecting.
Notice:
If the channel is a single port, then the port cannot add into any trunk group.
6.6.1 CLI Configuration
Node Command Description
enable show dual-homing This command displays the dual-homing information.
enable configure terminal This command changes the node to configure node.
configure dual-homing
(disable|enable)
This command disables / enables the dual-homing
function for the system.
configure dual-homing
primary-channel
(port|trunk) VALUE
This command sets the dual-homing primary channel
for the system. The channel can be a single port or a
trunk group.
configure no dual-homing
primary-channel
This command removes the dual-homing primary
channel for the system.
configure dual-homing
secondary-channel
(port|trunk) VALUE
This command sets the dual-homing secondary channel
for the system. The channel can be a single port or a
trunk group.
configure no dual-homing
secondary-channel
This command removes the dual-homing secondary
channel for the system.
Example:
L2SWITCH(config)#link-aggregation 1 ports 5-6
L2SWITCH(config)#link-aggregation 1 enable
L2SWITCH(config)#dual-homing primary-channel port 2
L2SWITCH(config)#dual-homing secondary –channel trunk 1
L2SWITCH(config)#dual-homing enable