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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter13 Configuring LRE
Upgrading LRE Switch Firmware
The no upgrade controller configuration command removes the command for applying a particular LRE
binary. To resume default upgrade behavior for a given controller, do not configure the custom upgrade
commands on that controller.
LRE Upgrade Details
This example shows how to upgrade your LRE switch:
Switch> enable
Switch# hw-module slot 0 upgrade lre
You are about to start an LRE upgrade on all LRE interfaces.
Users on LRE links being upgraded will experience a temporary disruption of Ethernet
connectivity.
Start LRE upgrade ? [yes]:
If you answer yes or press the Enter key, the upgrade starts. If you answer no, you get the EXEC prompt.
During an upgrade, this process occurs:
•When the upgrade starts, the link is probably in the link-up state, the state of the link that is useful
to you.
•When the upgrade starts, the remote CPE device resets. Ethernet connectivity is temporarily lost.
•The CPE device comes up, with the link slower (about 1 Mbps upstream and 4 Mbps downstream)
but more reliable. The increased reliability is required for a successful LRE binary transfer . The L RE
link stays at a slower speed for the duration of the upgrade. Ethernet connectivity is available.
•When the upgrade is complete, the CPE device is again reset so that the upgraded LRE binaries are
loaded and executed on the target CPE devices and local LRE chipsets. Ethernet connectivity is
again disrupted until the CPE finishes resetting.
•The link comes up when the CPE device comes back up, and then progresses t o wher e it resum es
full operation at its intended data rate.

LRE Upgrade Example

This example shows how an LRE upgrade occurs:
Switch# hw-module slot 0 upgrade lre force remote longreachethernet 0/1
You are about to start an LRE upgrade on CPE Lo0/1.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.
Start LRE upgrade ? [yes]:
Starting remote upgrade on CPE Lo0/1
Switch#
00:21:51: %LINEPROTO-5-UPDOWN: Line protocol on Interface
LongReachEthernet0/1, changed state to down
The CPE device is reset and the link is down. Ethernet connectivity is unavailable at this point.
00:22:37: %LINK-3-UPDOWN: Interface LongReachEthernet0/1, changed state to up
00:22:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface
LongReachEthernet0/1, changed state to up