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1–General Description
CPU Blades
59229-05 A 1-11
Maintenance Button
The Maintenance button is a dual-function momentary switch on the CPU blade.
Its purpose is to reset a CPU blade or to place the switch in maintenance mode.
Maintenance mode is used to recover the switch when flash memory or the
resident configuration file is corrupted. Refer to “Recovering a Switch Using
Maintenance Mode” on page 4-15 for more information about using maintenance
mode.
Resetting a CPU Blade
To reset a CPU blade, use a pointed tool to momentarily press and release the
Maintenance button on a CPU blade.
Placing the Switch in Maintenance Mode
Maintenance mode removes power from the I/O blades, and temporarily sets the
switch IP address to 10.0.0.1. To place the switch in maintenance mode, isolate
the switch from the fabric, then do one of the following:
For a single CPU blade switch:
1. Using a pointed tool, press and hold the Maintenance button.
2. When the CPU blade Heartbeat LED illuminates steady, release the
Maintenance button.
For a dual CPU blade switch:
1. If there are two Ethernet connections, disconnect one of them.
2. Power down the switch.
3. Power up the switch. As the switch is powering up, using two pointed
tools, press and hold the Maintenance buttons on both CPU blades at
approximately the same time. When the CPU blade Heartbeat LED
illuminates steady, release the Maintenance buttons.
To exit maintenance mode and return to normal operation, do the following:
For a single CPU blade switch, momentarily press and release the
Maintenance button, or power cycle the switch.
For a dual CPU blade switch, power cycle the switch.