Process Restartability; Synchronizing Supervisor Modules; Copying Boot Variable Images To The Standby Supervisor Module; Automatic Copying Of Boot Variables - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Process Restartability

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Process Restartability
Process restartability provides the high availability functionality in Cisco MDS 9000 Family switches.
It ensures that process-level failures do not cause system-level failures. It also restarts the failed
processes automatically. This vital process functions on infrastructure that is internal to the switch.
See the

Synchronizing Supervisor Modules

The running image is automatically synchronized in the standby supervisor module by the active
supervisor module. The boot variables are synchronized during this process.
The standby supervisor module automatically synchronizes its image with the running image on the
active supervisor module.
See the
Copying Boot Variable Images to the Standby Supervisor
Module
You can copy the boot variable images that are in the active supervisor module (but not in the standby
supervisor module) to the standby supervisor module. Only those KICKSTART and SYSTEM boot
variables that are set for the standby supervisor module can be copied. For module (line card) images,
all boot variables are copied to the corresponding standby locations (bootflash: or slot0:) if not already
present.

Automatic Copying of Boot Variables

To enable or disable automatic copying of boot variables, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# boot auto-copy
Auto-copy administratively enabled
switch(config)# no boot auto-copy
Auto-copy administratively disabled

Verifying the Copied Boot Variables

Use the show boot auto-copy command to verify the current state of the copied boot variables. This
example output shows that automatic copying is enabled:
switch# show boot auto-copy
Auto-copy feature enabled
Cisco MDS 9000 Family CLI Configuration Guide
10-4
"Displaying System Processes" section on page
"Replacing Modules" section on page
Chapter 10
59-1.
8-34.
Purpose
Enters configuration mode.
Enables (default) automatic copying of boot
variables from the active supervisor module to
the standby supervisor module.
Disables the automatic copy feature.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Configuring High Availability