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Downloading Software to Controller Modules
Future enhancements to controller module functionality may make it necessary to download a new revision
of the software. This section describes:
Guidelines
How to download boot and operational microcode
The Download Status Display.
Guidelines
The following guidelines explain the differences when downloading code when one or two controller
modules are installed.
Downloading When Two Controller Modules Installed:
In an 8265 containing with two controller modules installed, always perform the download in this order:
1. Perform a download to the standby controller module.
2. Perform a download to the active controller module.
When you download to the standby controller module first:
The standby controller module remains in standby mode and causes no disruption to 8265 operation.
The active controller module reboots, and then loses active controller module status to the standby
controller module. The active controller module reboots and briefly disrupts 8265 operation.
A download to the active controller module first would cause two disruptions to 8265 operation.
Because it causes two disruptions (one more than necessary), this approach to download is feasible
but not recommended.
When you download to the active controller module first:
The active controller module reboots and loses active controller module status (the standby controller
module becomes the "new" active controller module, and the "old" active controller module becomes
the standby controller module).
This is the first disruption to 8265 operation.
A second disruption to 8265 operation occurs when you download to the 'new' active controller module
that was previously the standby controller module (a second reboot and swap of active controller
module status takes place).
Chapter 11. Updating Microcode and Picocode
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