Avaya G430 Manual page 257

Layer 2 interfaces. You can configure the following backup delays with the backup delay
command:
• failure delay. The time in seconds between the primary interface going down and
the backup interface activation. The default is 0 seconds. The maximum is 3600
seconds.
• secondary disable delay. The time in seconds between the primary interface
restoration and the backup interface deactivation. The default is 0 seconds. The maximum
is 3600 seconds. Both interfaces are active during this time to enable a smooth transition
for the routing protocols. To keep the backup interface active indefinitely, use never as
the secondary disable delay.
Example
You can use the following command to switch over immediately to the backup interface in case
of failure, and pause 60 seconds before reverting to the primary interface:
Gxxx-001(super)# interface fastethernet 10/2
Gxxx-001(super-if:FastEthernet 10/2)# backup delay 0 60
Done!
Gxxx-001(super-if:FastEthernet 10/2)#
Interface backup relations rules
• Each interface can have only one backup interface.
• A backup interface can serve as a backup for only one other interface.
• Only one member of a primary and backup pair is active at any given time. An interface
is automatically deactivated when configured as backup.
• The backup implementation does not protect against the failure of both interfaces.
Therefore, if a backup interface fails while active, no switch to the primary interface is
attempted.
Note:
The backup interface is not activated when the primary interface is administratively
disabled.
Summary of backup interfaces commands
For more information about these commands, see the Avaya Branch Gateways G250 and
G350 CLI Reference.
For more information about these commands, see the Avaya Branch Gateway G430 CLI
Reference.
Administering Avaya G430 Branch Gateway
WAN interfaces
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