Alcatel-Lucent 7450 ESS-12 Configuration Manual page 200

Image and Configuration Management
persist
Syntax persist {on | off}
Context bof
Description
This command specifies whether the system will preserve system indexes when a save command is
executed. During a subsequent boot, the index file is read along with the configuration file. As a result, a
number of system indexes are preserved between reboots, including the interface index, LSP IDs, path IDs,
etc. This reduces resynchronizations of the Network Management System (NMS) with the affected network
element.
In the event that persist is on and the reboot with the appropriate index file fails, SNMP is operationally shut
down to prevent the management system from accessing and possibly synchronizing with a partially booted
or incomplete network element. To enable SNMP access, enter the config>system>snmp>no shutdown
command.
If persist is enabled and the admin save <url> command is executed with an FTP path used as the <url>
parameter, two FTP sessions simultaneously open to the FTP server. The FTP server must be configured to
allow multiple sessions from the same login, otherwise, the configuration and index files will not be saved
correctly.
Notes:
• Persistency files (.ndx) are saved on the same disk as the configuration files and the image files.
• When an operator sets the location for the persistency file, the system will check to ensure that the disk
has enough free space. If this there is not enough free space, the persistency will not become active and
a trap will be generated. Then, it is up to the operator to free adequate disk space. In the meantime, the
system will perform a space availability check every 30 seconds. As soon as the space is available the
persistency will become active on the next (30 second) check.
Default off
Parameters
on — Create when saving the configuration.
off — Disables the system index saves between reboots.
7450 ESS OS Basic System Configuration Guide
Boot Option Files
Page 193