Instruction manual

Chapter 3: High Availability
3-16 NetScaler 9000 Series Installation and Configuration Guide - Volume 1
NSICG60_JAN05
Note: When the force ns failover CLI command is executed on the
Primary device, and the secondary device has been configured to stay
as secondary using the
set ns node –hastatus
staysecondary
CLI, then the system displays the error message
“Operation not possible due to invalid peer state. Rectify and retry.”
3.7.1 Executing Force Failover from the Primary Device
When the force ns failover CLI command is executed from Primary
device, then this device becomes the Secondary device and the Secondary
device becomes the Primary device. Force failover happens only if the
Primary device gets the information that the Secondary device is UP.
Note:
If the Secondary device is down, the
force ns failover CLI
command returns the error message “Operation not possible due to
invalid peer state. Rectify and retry.”
If the Secondary device is in claiming or inactive state, it returns the
message “Operation not possible now. Please wait for system to
stabilize before retrying.”
3.7.2 Executing Force Failover from the Secondary Device
When the force ns failover CLI command is executed from Secondary
device, then the Secondary device becomes the Primary device and the
Primary device becomes the Secondary device. Force failover happens only if
the Secondary device’s health is good or if the device is not configured to stay
secondary.
Note:
If the Secondary device cannot become the Primary device or if
Secondary device is configured to stay secondary using the
set ns
node -hastatus staysecondary
CLI command, the system
displays the message “Operation not possible as my state is invalid.
Use show node for more information.”