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• LN1000–V Mobile Secure Router Hardware Guide

Setting Non-Volatile Memory Read-Only

Before you upgrade the software or firmware on the LN1000 Mobile Secure Router, the non-volatile memory read-only (NVMRO) switch must be clear to enable writing to system storage. NVMRO must also be clear to permanently save any CLI changes.

To check the current setting of NVMRO:

1. Log in to the router as root.
2. From the CLI, type:
   root@host# sysctl kern.nvmro

   kern.nvmro: 1

   The value must be 0 to upgrade any files on the router. If the value is 0, proceed to Installing Software Upgrades from the Network. If the value is 1, all storage on the router is locked. You must reset the NVMRO switch located on the rear transition module (RTM) to allow installation. See the LN1000–V Mobile Secure Router Hardware Guide for the location of this switch.

3. Power off the system:
   root@host# cli request system power-off

   When you see the following message, the system is safely powered off:

   syncing disks... All buffers synced.
   Uptime: 20h14m55s
   Turning system power off

   Follow the instructions in the LN1000–V Mobile Secure Router Hardware Guide to access the RTM and toggle the NVMRO switch.

   • To clear NVMRO (allow writing/updating), turn the switch on.
   • To set NVMRO (lock all storage), turn the switch off.
4. Reinstall the RTM and boot the router.