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on | off
auth auth-high auth-low
ip-aux IP-address[:IP-address ...]
Guidelines
The various forms of the standby command implement a standby configuration to
ensure that an interface on another DataPower appliance is available if an active
interface becomes unresponsive. In a standby configuration multiple interfaces
coordinate the use of one virtual IP (VIP) address. Only one interface on the
connected IP subnet can be active (listening) on that address at one time. The
interfaces must all be in the same broadcast domain and must be able to receive IP
packets that are sent to the multicast address 224.0.0.2 (all routers) from each
other. The interfaces in a group should implement the same services.
Only the first form of the command is required to create a standby configuration.
The other forms alter parameters that have default values. The following
configuration parameters must be identical for all of the interfaces in one failover
group:
v group
v ip VIP
v auth auth-high auth-low
By default, all interfaces in a group seek to be active at the same priority. The
active interface changes only if that interface goes down or is disconnected. The
priority parameter allows favoring some systems over others, with higher values
being higher priority. The active interface changes only when the previous active
interface goes down, unless preemption is enabled.
Only one interface, either Ethernet or VLAN, on a given physical Ethernet interface
can have a failover configuration. Only one interface on a given system can have a
failover configuration with a particular group VIP.
For detailed information about implementing a standby configuration, refer to the
"Standby configurations" topic in the IBM WebSphere DataPower SOA Appliances:
Administrators Guide.
738
Command Reference
Indicates whether to use preemption.
on
Indicates that this interface forcibly claims the virtual IP address if
the current owner of the virtual IP address has a lower priority.
Higher priorities allow favoring one interface to be active at the
cost of increasing the risk of broken TCP connections when the
active interface changes.
off
Indicates that the virtual IP address move only when the current
owner is disconnected from the network.
Specifies the first eight bytes of the authentication string in hexadecimal:
auth-high
Specifies the first four bytes. The default is 0x35554158.
auth-low
Specifies the second four bytes. The default is 0x00000000.
Specifies additional IP addresses to install on the interface when it is the
active interface. Separate multiple IP addresses with a colon.
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