Dell PowerConnect 6248 User's Guide - Page 260

• Backup Configuration Age - Indicates the time since the running configuration was last copied to the backup unit. Click Initiate Failover to start a warm restart. On a warm restart, the backup unit becomes the management unit without clearing its hardware tables (on a cold restart, hardware tables are cleared). Applications apply checkpointed data from the former management unit to the backup unit as the original management unit reboots. If the system is not ready for a warm restart, for example because no backup unit has been elected or one or more members of the stack do not support nonstop forwarding, the command fails with a warning message. Click Submit if you have updated the NSF Admin Status. If you want the switch to retain the new setting across a power cycle, you must perform a save. Click Refresh to redisplay the page with the latest status values from the switch. Configure Nonstop Forwarding Using CLI Commands For information about the CLI commands that perform this function, see the System Management Commands chapter in the CLI Reference Guide. The following table summarizes the equivalent CLI commands you use to configure NSF. Table 6-57. Nonstop Forwarding Commands CLI Command [no] nsf show nsf initiate failover Description Enables or disables NSF on the stack. Displays global and per-unit information on NSF configuration on the stack. Forces the backup unit to take over as the management unit and performs a "warm restart" of the stack. Checkpoint Statistics Use the Checkpoint Statistics page to display information about the protocol and routing data that the management unit shares with the backup unit. To display this page, click System →Stacking →NSF → Checkpoint Statistics. 260 Configuring System Information