Auto Detect Implementation In Vlan Interface Backup - 3Com E4500-24 Cli Configuration Manual

To avoid such problems, you can configure another route to back up the static route and use the Auto
Detect function to judge the validity of the static route. If the static route is valid, packets are forwarded
according to the static route, and the other route is standby. If the static route is invalid, packets are
forwarded according to the backup route. In this way, the communication is not interrupted, and the
network reliability is improved.
You can bind the static route with a detected group. The Auto Detect function will then detect the group
and judge the validity of the static route according to the returned reachable/unreachable information..
The static route is valid if the detected group is reachable.
The static route is invalid if the detected group is unreachable.
You need to create the detected group before performing the following operations.
Follow these steps to configure the auto detect function for a static route:
To do...
Enter system view
Bind a detected group to
a static route

Auto Detect Implementation in VLAN Interface Backup

VLAN interface backup means backing up the VLAN interfaces on a devices. Usually, the master VLAN
interface transmits traffic, while the backup VLAN interfaces stay standby. When the master VLAN
interface or the link connected to the VLAN interface fails and thus cannot transmit traffic, the backup
VLAN interface can be used for communication. In this way, the network reliability is improved.
As shown in Figure
The two VLAN-interfaces back up each other. Normally. VLAN-interface 1 transmits traffic, while
VLAN-interface 2 stays standby. When VLAN-interface 1 or the link connected to VLAN-interface 1 fails
and thus cannot transmit traffic normally, VLAN-interface 2 takes over to transmit traffic. In this way, the
traffic can be transmitted smoothly without interruption.
Use the command...
system-view
ip route-static ip-address { mask | mask-length }
{ interface-type interface-number | next-hop }
[ preference preference-value ] [ reject |
blackhole ] detect-group group-number
1-1, Switch A has two VLAN interfaces: VLAN-interface 1 and VLAN-interface 2.
1-3
Remarks
—
Required