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Introduction 14
through a procedure called auto-negotiation. Auto-negotiation involves probing the capability of the
network using low-level signaling techniques to select compatible Ethernet speeds. Auto-negotiation was
originally developed to make the migration from traditional Ethernet to Fast Ethernet products easier.
Redundant images in firmware
The switch stores up to two different software images, called image1 and image2, as well as boot
software, called boot. When downloading new software, the ability to specify where it is to be placed
(into image1, image2, or boot) is activated.
For example, if the active image is currently loaded into image1, load the new image software into
image2. This allows a test of the new software and the option to revert back to the original image stored
in image1, if needed.
CAUTION: Unlike the firmware that has two images, there is only one image of boot supported.
Upgrading the boot image replaces the original boot image.
External components
This section describes the rear panel of the switch.
Rear panel
Item Description Description
1 Reset button
Forces the switch to power up or
reboot
2 Health LED • Off—Not powered up
• Green—Powered up and all
ports match
• Amber—Indicates a problem
such as a port mismatch. For
more information, see the HP
BladeSystem enclosure setup and
installation guide.
3 UID LED