JUNOS Software Media and Packages
Your routing platform comes with JUNOS software installed on it. When you power on the router, all software starts automatically. You simply need to configure the software so that the router will be ready to participate in the network.
The software is installed on the router's flash disk (a nonrotating drive) and hard disk (a rotating disk). A copy of the software also is provided on removable media, either a PC Card, which can be inserted into the router's drive or card slot. By default, when you power on the router, it runs the copy of the software that is installed on the flash disk.
You can upgrade the router software as new features are added or software problems are fixed. You normally obtain new software by downloading the images from the Juniper Support Web page onto your router or onto another system on your local network. Then you install the software upgrade on the router's flash disk and hard disk. You can also copy the software onto the removable media.
Juniper Networks routing platforms run only binaries supplied by Juniper Networks. Each JUNOS software image includes a digitally signed manifest of executables, which are registered with the system only if the signature can be validated. JUNOS software will not execute any binary without a registered fingerprint.This feature protects the system against unauthorized software and activity that might compromise the integrity of your router.
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NOTE: JUNOS Release 7.2 and later releases include a digitally signed manifest of executables. JUNOS Release 7.5 and later releases require these signed manifests to enable execution of binaries. |