Switchover Mechanisms; Ha Switchover Characteristics - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Synchronizing Supervisor Modules
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
The standby supervisor module automatically synchronizes its image with the running image on the
active supervisor module.
See the
The following conditions identify when automatic synchronization is possible:
If the internal state of one supervisor module is Active with HA standby and the other supervisor
•
module is HA-standby, the switch is operationally HA and can do automatic synchronization.
• If the internal state of one of the supervisor modules is none, the switch cannot do automatic
synchronization.
Table 17-1
Table 17-1
State
Not present
Initializing
Active
Standby
Failed
Offline
At BIOS
Unknown
Table 17-2
Table 17-2
State
Active
HA standby
Offline
Unknown
Table 17-3
Table 17-3
State
HA standby
Active with no standby
Cisco MDS 9000 Family Fabric Manager Configuration Guide
17-4
"Replacing Modules" section on page
lists the possible values for the redundancy states.
Redundancy States
Description
The supervisor module is not present or is not plugged into the chassis.
The diagnostics have passed and the configuration is being downloaded.
The active supervisor module and the switch is ready to be configured.
A switchover is possible.
The switch detects a supervisor module failure on initialization and automatically
attempts to power-cycle the module three (3) times. After the third attempt it
continues to display a failed state.
The supervisor module is intentionally shut down for debugging purposes.
The switch has established connection with the supervisor and the supervisor
module is performing diagnostics.
The switch is in an invalid state. If it persists, call TAC.
lists the possible values for the supervisor module states.
Supervisor States
Description
The active supervisor module in the switch is ready to be configured.
A switchover is possible.
The switch is intentionally shut down for debugging purposes.
The switch is in an invalid state and requires a support call to TAC.
lists the possible values for the internal redundancy states.
Internal States
Description
The HA switchover mechanism in the standby supervisor module is
enabled (see the
A switchover is possible.
Chapter 17
15-17.
"HA Switchover Characteristics" section on page
OL-17256-03, Cisco MDS NX-OS Release 4.x
Configuring High Availability
17-2).