Loading Hot Patch - H3C S3100-52P Operation Manual

Operation Manual – System Maintenance and Debugging
H3C S3100-52P Ethernet Switch
Upgrade the Boot ROM

4.2.7 Loading Hot Patch

A patch is a standalone software unit that is released to fix errors found in a system.
A hot patch can fix system errors without rebooting the device or interrupting network
operation. That is, it can upgrade the system dynamically.
Patches can be added to a patch file incrementally. That is, any subsequent patch file
contains all the patches for fixing errors in the previous patch file besides the patches
for fixing the current errors. In this way, all the system errors found can be fixed once
and for all by loading the latest patch file.
In the device, a patch can be in one of the following four states:
IDLE: The patch is initialized but not loaded.
DEACTIVE: The patch is loaded but not activated.
ACTIVE: The patch is active but not running.
RUNNING: The patch is running.
The difference between active patches and running patches:
After system reboot, an ACTIVE patch becomes DEACTIVE and stops working;
After system reboot, a running patch remains running.
The active state provides a buffer to help prevent the system from running with errors
introduced by the by the patches.
Any state of the four cannot be switched to another without user intervention on the
command line.
Figure 4-1
Figure 4-1 Relationship between patch state transition and commands
Follow these steps to perform hot patch configuration:
To do...
boot bootrom { file-url | device-name }
illustrates how patch states change with commands:
Use the command...
4-4
Chapter 4 Device Management
Remarks
Required