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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 12 Configuring LRE
Upgrading LRE Switch Firmware
Upgrading LRE Switch Firmware
The Catalyst 2950 LRE switch can store and properly apply LRE binaries in case there are updates
required to the firmware on the switch local LRE controllers or connected CPE devices.
Other desirable upgrade-related features include:
• Allowing you to use an earlier version of the LRE software if required.
• Simplifying the upgrade process as much as possible, especially in cases where you want to upgrade
multiple CPE devices by using a single command.
Note Whether upgrading a single CPE device or all CPE devices connected to an LRE switch, the expected
duration of an LRE upgrade is 3 to 6 minutes. (CPE devices connected to marginal links might take
longer than this to upgrade.)
You perform an upgrade by using the hw-module slot module-slot-number upgrade lre [force] [local
ctrlr-unit-number | remote interface-id] privileged EXEC command.
Automatic upgrading is not supported. You can upgrade in one of these ways:
• Upgrade a single remote CPE device.
• Upgrade a single local LRE controller (local LRE chipset).
• Upgrade all CPE devices and local chipsets that require an upgrade (a system-wide upgrade, which
is the default).
Configuring for an LRE Upgrade
In the absence of any LRE upgrade configurations, the LRE upgrade attempts to upgrade all local LRE
controllers and CPE devices to the most recent compatible versions of the LRE binaries required for each
LRE target device. LRE upgrade configurations should rarely be required. The primary purpose of LRE
upgrade configuration commands is to provide for downgrades of LRE binaries.
If you wish to override the automatic switch selection of LRE binaries, these methods are available:
• Global LRE upgrade configuration commands
• LRE controller configuration commands
You can specify the LRE binary or binaries for a specified target type. A target type is the family (and
optionally the model or model revision) of a device containing one or more upgradable hardware
elements. A target can be a local LRE controller on the switch or a remote CPE device.
You can perform global LRE upgrade configurations by entering the upgrade binary and the upgrade
preserve controller configuration commands.
Note You must remove global configurations that might affect the controller and devices connected to it.
Note If you enter the lre upgrade default family global configuration command and the upgrade binary
LRE binary [remote interface-id] controller configuration command, the upgrade binary controller
configuration command has precedence.
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