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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter10 Configuring LRE
Upgrading LRE Switch Firmware
If you wish to override the switch’s automatic selection of LRE binaries, you have these methods
available:
• Global LRE Upgrade Configuration Commands
• LRE Controller configuration commands
You can use config global commands to 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 issuing LRE upgrade controller configuration
commands from the controller configuration submode. You can use the upgrade configuration command
in the controller submode to override the system default selection of an LRE binary to be applied on a
particular remote CPE device or local LRE controller. Controller configurations take precedence over
global upgrade configurations.
The preserve keyword causes the LRE upgrade mechanism to not upgrade the local controller on which
preserve is configured or any of the CPE devices connected to that controller. If you want to preserve
(in other words, not upgrade) some of the CPE devices connected to a particular controller but allow
upgrades to others, you can enter controller upgrade configuration commands for the links that you want
to upgrade.
The no form of the upgrade command removes the command for applying a particular LRE binary. To
resume default upgrade behavior for a given controller, configure the no upgrade commands on that
controller
Note You also need to remove global configurations that might also affect the controller and devices
connected to it.
Note When a config global command and a config controller command conflict, the config controller
command has precedence.
Refer to the reference pages for the upgrade commands in the Catalyst 2950 Desktop Switch Command
Reference for further details.
Performing an LRE Upgrade
You can upgrade either on a system-wide basis (in other words, upgrading the software on all connected
CPE devices and local LRE chipsets) or on individual CPE device or LRE controllers. By default, a
system-wide upgrade applies the most recent versions of LRE binaries that are most compatible with
each upgradable hardware module. The system-wide upgrade method is the one that you use in almost
all situations.
When executing upgrades, you can elect to upgrade a single CPE device or local controller by using this
command hw-module slot <x> upgrade lre [local lo n | remote lo x/y]. If no local or remote option is
given, a system-wide upgrade is performed.