Interface Backup Relations Rules; Backup Commands; Modem Dial Backup - Avaya G250 Administration

Interface backup relations rules

Each interface can have only one backup interface.
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A backup interface can serve as a backup for only one other interface.
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Only one member of a primary and backup pair is active at any given time. An interface is
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automatically deactivated when configured as backup.
The backup implementation does not protect against the failure of both interfaces.
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Therefore, if a backup interface fails while active, no switch to the primary interface is
attempted.
When using frame relay encapsulation, the frame relay interface is considered down when its
primary DLCI is down. The switch over back to the main interface occurs when the primary Data
Link Connection Identifier (DLCI) is restored.
Note:
The backup interface is not activated when the primary interface is
Note:
administratively disabled.

Backup commands

Use the backup interface command, followed by the interface type and number, to set
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a backup interface. You must use this command from the context of the interface for which
you are setting a backup interface.
Use the backup delay command to set the time to wait before switching over to the
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backup interface, in case of failure. You can also use this command to set a delay before
reverting back to the primary interface. For example, the following command causes the
G250/G350 to switch immediately to the backup interface in the event of primary interface
failure, and to delay 60 seconds before reverting back to the primary interface once the
primary interface is restored to service:
G350-001(super-if:FastEthernet 10/2)# backup delay 0 60

Modem dial backup

The modem dial backup feature allows the Avaya G250/G350 Media Gateway to utilize a
modem to provide redundant connectivity between a G250/G350 and IP phones in a small
branch office and their primary Media Gateway Controller (MGC) at the headquarters or a
regional branch office.
Modem dial backup
Issue 3 February 2007 233