Specifications

8/20q Fibre Channel Switch installation and reference guide 13
Maintenance button
The Maintenance button (Figure 2) is a dual-function momentary switch on the front panel. Its purpose is to
reset the switch or to place the switch in maintenance mode. Maintenance mode sets the IP address to
10.0.0.1 and provides access to the switch for maintenance purposes when flash memory or the resident
configuration file is corrupted. For more information, see ”Recovering a switch using maintenance mode”
on page 46.
Resetting a switch
To reset the switch, press and hold the Maintenance button with a pointed tool for less than 2 seconds. The
switch will respond as follows:
1. All the switch LEDs will illuminate except the System Fault LED.
2. After approximately 1 minute, the power-on self test (POST) begins, extinguishing the Heartbeat LED.
3. When the POST is complete, the Input Power LED is illuminated and the Heartbeat LED is flashing once
per second.
Placing the switch in maintenance mode
To place the switch in maintenance mode:
1. Isolate the switch from the fabric.
2. Press and hold the Maintenance button with a pointed tool for a few seconds until only the Heartbeat
LED (Figure 2) is illuminated. Continue holding the maintenance button until the Heartbeat LED goes
off, then release the button. The Heartbeat LED illuminates continuously while the switch is in
maintenance mode.
To exit maintenance mode and return to normal operation, press and release the Maintenance button
momentarily to reset the switch.