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If the system contains only one SRP module, you should divert traffic to another system before you install a new software release, because the system will be unavailable during the installation process. Depending on whether a firewall separates the ERX system from the network host, you can then complete the appropriate software installation (see Installing Software When a Firewall Exists or Installing Software When a Firewall Does Not Exist). However, if the system contains two SRP modules, you can upgrade the software while the system is operating (see Upgrading Systems That Are Operating with Two SRP Modules).

When installing new ERX software, you must mount the software CD on a network host and transfer the release files to at least one ERX system in the network. Depending on the network configuration, you can copy the release files from either the network host or the first ERX system to the other ERX systems in the network (see Copying Release Files from One ERX System to Another).

Identifying the Software Release File

The ERX system software CD contains two software releases: one for the ERX-1440 system and one for all other ERX systems. Both releases are in the software directory, which is identified by the release number. For example, if the release number is x.y.z, the name of the directory is x-y-z. To identify the software release file:

  1. Access the software directory.
  2. Find the files with the extension .rel.

The procedures outlined in the following sections provide detailed instructions for typical installations. For additional information about commands and troubleshooting, refer to the ERX System Basics Configuration Guide, the ERX Command Reference Guide A to M, and the ERX Command Reference Guide N to Z.

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