sys failover¶

sys failover(1) BIG-IP TMSH Manual sys failover(1)

NAME
failover - Configures failover for a BIG-IP(r) unit in a redundant system configuration.

MODULE
sys

SYNTAX
Change the failover state within the sys module using the syntax in the following section.

MODIFY
run failover
options:
device [string]
no-persist
offline
online
persist
standby
traffic-group [[string] | default | non-default | none]

DISPLAY
show failover
options:
cable

DESCRIPTION
Failover is the process where a standby unit in a redundant system configuration takes over when a software or
hardware failure is detected on the active unit.

EXAMPLES
run failover standby

Causes the active unit or cluster to go into the standby state forcing the other unit or cluster in the
redundant system configuration to become active.

run failover offline

Causes the active unit or cluster to go into the Forced Offline state.

run failover online

Changes the status of a unit or cluster from Forced Offline to either Active or Standby, depending upon the
status of the other unit or cluster in a redundant system configuration.

show failover

Displays the failover state of the BIG-IP system (active, standby, offline, forced_offline) and how long it
has been in that state.

run failover standby device my_bigip

Specifies that the my_bigip device should become the active device for all traffic groups currently active on
this device.

run failover standby traffic-group traffic_grp01

Specifies that the traffic group named traffic_grp01 should fail over to the Standby state. The traffic group
will then become Active on another device.

run sys failover offline no-persist

Changes the status of a unit to Forced Offline and indicates that the change will not be persisted after a
system restart.

run sys failover offline persist

Changes the status of a unit to Forced Offline and indicates that the change will be persisted after a system
restart.

OPTIONS
Use these options to control failover of the system:

device
Specifies the device that should next become the active device for the specified traffic group or all
traffic groups (if a traffic group is not specified). This option may only be specified with the standby
option.

no-persist
Does not persist the change in status of a unit. The option is valid only with the offline state.

offline
Changes the status of a unit or cluster to Forced Offline. If persist or no-persist options are not
specified, the default action is to persist the offline status of the unit between system restarts.

online
Changes the status of a unit or cluster from Forced Offline to either Active or Standby, depending upon
the status of the other unit or cluster in a redundant system configuration.

persist
Persists the change in status of a unit. The option is valid only with the offline state.

standby
Specifies that the active unit or cluster fails over to a Standby state, causing the standby unit or
cluster to become Active.

traffic-group
Specifies the traffic-group that should fail over to the Standby state, the traffic-group will become
Active on another device. This option may only be specified with the standby option.

Use this option to display the failover cable status of the system:

cable
Displays the status that the failover daemon detects on the serial cable from its failover peer. It also
shows what the failover peer detects on the serial cable. An active BIG-IP system will see a zero from
its failover peer. A standby BIG-IP system will see a one from its failover peer.