JUNOS Enterprise Routing

Migrating from JUNOS to JUNOS Software with Enhanced Services

This section details the steps you need to follow to migrate a J-series router running JUNOS to run JUNOS software with enhanced services remotely, without losing network connectivity. Much of this information is summarized from the “JUNOS Enhanced Services Migration Guide,” available at http://www.juniper.net/techpubs/software/junos-es/junos-es85/junos-es-migration/junos-es-migration.pdf. Users are encouraged to consult the documentation for particulars about their hardware before performing any migrations.

Not having enough free compact flash space available to perform an upgrade is common, especially on routers that have large logs, trace files, or old software packages lying about in users’ home directories. The migration guide provides detailed instructions on how to free up compact flash space to enhance the chances of being able to upgrade to JUNOS software with enhanced services on systems with 256 MB compact flash chips. The instructions have you delete various temporary and unneeded files using combinations of CLI and root shell mode commands, some of which are demonstrated on the following pages.

Understanding JUNOS Software with Enhanced Services Operational Modes

A J-series Services Router running JUNOS software with enhanced services can operate as either a stateful firewall or a router, depending on whether it is in the secure or router context:

Secure context

This mode allows a Services Router to act as a stateful ...