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Creating and deleting a floating IP address
A floating IP address enables a client to use the same IP address for a replicated data
queue manager (RDQM) regardless of which node in the HA group it is running on.
About this task
You can create or delete a floating IP address by using the rdqmint command.
The floating address binds to a named physical interface on the primary node for the RDQM. If the
RDQM fails over and a different node becomes the primary, the floating IP is bound to an interface
of the same name on the new primary. The physical interfaces on the three nodes must belong to the
same subnet as the floating IP address. The following diagram illustrates the use of a floating IP
address.Figure 1. Floating IP address
You must be a user in both the mqm and haclient groups to run
the rdqmint command. You can create or delete the floating IP address on the
primary node for the RDQM, or either of the secondary nodes.
Note: You cannot use the same floating IP address for multiple RDQMs, the floating IP address for
each RDQM must be unique.
Procedure
To create a floating IP address for an RDQM, enter the following command:
rdqmint -m qmname -a -f ipv4address -l interfacename
where:
qmname
Is the name of the RDQM you are creating the floating IP address for.
ipv4address
The floating IP address in ipv4 format.
The floating IP address must be a valid IPv4 address
that is not already defined on either appliance, and it must belong to the same subnet as the static
IP addresses defined for the local interface.
interfacename
The name of the physical interface on the primary node to bind to.
For example:
rdqmint -m QM1 -a -f 192.168.7.5 -l MQCLI
To delete an existing floating IP address, enter the following command: