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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter13 Configuring LRE
Upgrading LRE Switch Firmware
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 , wh ich
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 th e LRE binaries req uired 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 bina rie s.
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 up grada ble h ardware
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.
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 upgrad e met hod is t he one th at you use in a lmost
all situations.