Paradyne CSU User Manual

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4. Configuration Options
9128-A2-GB20-80
September 2002
4-17
Restricting Automatic Backup and Configuring Backup Timers
You can specify when auto backup is allowed to occur. If backup is restricted and a 
backup is active when the allowed time for backups is over, then the backup is 
terminated and the data is returned to the primary data path regardless of the 
primary path’s condition. 
You can restrict auto backup to occur only:
„
On certain days of the week
„
At certain times of the day
The following additional features can be configured:
„
Delays can be configured to control how long the unit will wait before initiating 
backup when a DLCI is declared down, and how long it will wait to restore 
service once the DLCI is declared operational again.
„
A threshold can be set to determine how many times a primary destination 
DLCI can transition between Active and Inactive before the unit initiates 
backup.
Procedure
 
To set the criteria and backup timers for automatic backup:
1. Enable Auto Backup.
Main Menu
Configuration
Auto-Backup Criteria
When a failure occurs, the unit automatically enables the Alternate Link and 
traffic is rerouted over the backup (alternate) interface.
2. Specify the amount of delay after a DLCI is declared down before backup is 
initiated (DLCI Down Backup Activation Delay).
3. Set the threshold for transitions of the DLCI’s status before backup is initiated 
(DLCI Down Backup Activation Transmission Threshold).
4. Specify the amount of delay after a DLCI is declared operation before backup 
is ended (Backup Restoration Delay).
5. Specify When Auto Backup Allowed – Always or Restrict. If Restrict is 
selected, specify the days and hours of the week during which automatic 
backup can take place.
6. Save the configuration.
, for configuration information.