Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring a WAN InterfaceConfigurable activation and deactivation delays provide a damping effect on the backupinterface pair. This eliminates primary-to-backup switching in case of fluctuating underlyingLayer 2 interfaces. You can configure the following backup delays using the backup delaycommand:●Failure delay — The time in seconds between the primary interface going down andthe backup interface activation. Default = 0 seconds, maximum = 3600 seconds.● Secondary Disable delay — The time in seconds between the primary interfacerestoration and the backup interface deactivation. Default = 0 seconds, maximum = 3600seconds. Both interfaces are active during this time to enable a smooth transition for therouting protocols. To keep the backup interface active indefinitely, use never as thesecondary disable delay.For example, you can use the following command to switch over immediately to the backupinterface in case of failure, and pause 60 seconds before reverting to the primary interface:GG350-001(super)# interface FastEthernet 10/2G350-001(super-if:FastEthernet 10/2)# backup delay 0 60Done!G350-001(super-if:FastEthernet 10/2)#The following rules govern the interface backup relations:●●●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 isautomatically 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 isattempted.When using frame relay encapsulation, the frame relay interface is considered down when itsprimary DLCI is down. The switch over back to the main interface occurs when the primary DataLink Connection Identifier (DLCI) is restored.Note:Note:The backup interface is not activated when the primary interface isadministratively disabled.98 Administration of the Avaya G350 Media Gateway