Upgrading a JCS1200 Route Reflector to 64-Bit Junos OS

On a JCS1200 route reflector, you can install 64-bit Junos OS to improve memory and performance. However, you cannot mix a 32-bit image and a 64-bit image in the same JCS chassis. This upgrade is available only for route reflector applications. Protected System Domain is not supported.

Note: You can also order a routing engine with 64-bit Junos OS image preinstalled.

Following are the memory and Junos OS requirements:

• Memory requirements—There are no special memory requirements to use a 64-bit Junos OS on a JCS1200 route reflector. Your existing hardware configuration is sufficient for using 64-bit Junos OS.
• Junos OS release requirements—64-bit Junos OS is supported from Junos OS Release 10.3.

Downloading 64-Bit Junos OS

To download 64-bit Junos OS:

• Download the 64-bit software package from the Juniper Networks Support website at http://www.juniper.net/support/. Under Download Software, select either Junos (US & Canada) or Junos (Worldwide).

  To download the software package, you must have a service contract and an access account. If you need help obtaining an account, complete the registration form at the Juniper Networks website: https://www.juniper.net/registration/Register.jsp.

Installing 64-Bit Junos OS

1. Back up the currently running file system so that you can recover to a known, stable environment in case something goes wrong with the upgrade:
   user@host>request system snapshot

   The root file system is backed up to /altroot, and /config is backed up to /altconfig. The root and /config file systems are on the router’s CompactFlash card, and the /altroot and /altconfig file systems are on the router’s hard disk.

   Note: After you issue the request system snapshot command, you cannot return to the previous version of the software, because the running copy and the backup copy of the software are identical.

2. Copy the downloaded software package to the /var/tmp directory on the hard disk:
   user@host> file copy ftp://username:prompt@ftp.hostname.net/filename /var/tmp
3. Add the new software package:
   user@host> request system software add/var/tmp/ installation-package validate

   installation-package is the full name of the file copied in the previous step. For 64-bit Junos OS, the full name would be jinstall64.tgz.

   The system might display the following message:

   pkg_delete: couldn’t entirely delete package

   This message indicates that someone manually deleted or changed an item that was in a package. You do not need to take any action; the package is still properly deleted.

4. Reboot the router to start the new software:
   user@host> request system reboot
5. After you have upgraded the software and are satisfied that the new software is properly running, issue the request system snapshot command to back up the new software:
   user@host> request system snapshot

The root file system is backed up to /altroot, and /config is backed up to /altconfig. The root and /config file systems are on the router’s CompactFlash card, and the /altroot and /altconfig file systems are on the router’s hard disk.

Note: After you issue the request system snapshot command, you cannot return to the previous version of the software, because the running copy and backup copy of the software are identical.