84CHAPTER 6: SWITCH MONITORING AND MAINTENANCE
c CAUTION: When you replace the fan tray of an operating switch, pull the fan tray out from the chassis only after the fans stop rotating. In this case, there is still the possibility that fans are still rotating. Therefore do not put your hand into the fan tray to avoid bodily injury.
Step 2: Gently pull the fan tray out of the slot along the guides.
Step 3: Put the removed fan tray into the packing bag.
Step 4: Hold the handle of the fan tray with one hand and its bottom with the other and pull them outward. Align the fan tray with the guides in the chassis and slide it gently into the slot until its positioning pin touches the positioning hole in the chassis.
Step 5: Screw on the captive screws on both sides of the fan tray.
c CAUTION: Install a new fan tray soon after removing the old one to ensure the normal working of the Switch.
Software Upgrade
Upgrade preparations The Switch 8807 and Switch 8810 software can be maintained in the same way as that for the Switch 8814, so Switch 8814 is used as an example in the following software maintenance process.
Required cables
■Console cable (for serial interface)
■One crossover and one standard network cables
■Debug cable (for serial interface)
Recommended upgrade procedure
1Confirm if the host program has loaded before initiating software upgrade.
2Check the current version of the host and Boot ROM programs.
3Back up the current host program, Boot ROM program and configuration file (to PC recommended), for possible rollback in case of failed upgrade.
4Load the host and Boot ROM program files to the switch. If the switch has two fabrics, you also can copy the host and Boot ROM program files to the standby fabric.
5Upgrade the Boot ROM program on the fabric and I/O module (optional).
6Specify the next boot program. If the switch has two fabrics, specify the load programs respectively for the active and standby fabrics.
7Reboot the switch.
8Check if the board version is correct.
You can load the software through command line interface (CLI) and Boot menu.
1Local loading using Boot menu:
■ Loading using XModem and through Console port
