Situations exist where you must select a preferred IP address,
or a range of IP addresses that you want the high availability manager to
use for communication within a core group.
Before you begin
Determine the
transport protocol the
core group associated with the high availability manager uses for communications.
Why and when to perform this task
If the core group is configured to use a point-to-point protocol
for its communications, for example, channel framework or unicast, only set
a preferred IP address if you want to restrict the high availability manager
communications to a specific IP address.
If the core group is configured
to use a multicast transport for its communications, you must set a preferred
IP address and specify a range of multicast group IP addresses.
Steps for this task
- Configure a preferred IP address.
- Make a list of all WebSphere Application Server processes on
this machine. Include both application server processes and administrative
processes, such as node agents or the deployment manager, in this list. If
you set a preferred IP address is set for one of the processes on a machine,
you must set it for all of the processes on that machine.
- Determine the textual form of the preferred IP address.
For example, 9.5.87.124 or 10.1.2.2.
- Update the IP address for all of the processes identified in
the first substep with the textual form of the preferred IP address that you
specified for the DCS unicast address.
- In the administrative console:
- For an application server process, click Servers > Application servers.
- For a node agent process, click System administration > Node agents.
- For a deployment manager process, click System administration > Deployment
manager.
- Select the appropriate process.
- Under Additional properties , click Ports to bring up the
list of ports for the selected process.
- Click the port named DCS_UNICAST_ADDRESS.
- Enter the preferred IP address in the Host field and then click Apply to
save your changes.
Following are the allowed values for the Host field:
- An asterisk, which allows high availability manager communications on
all IP addresses. This is the default value, but cannot be used if your processes
must interact with V6.0.0 or V6.0.1 processes.
- Text IP address, such as 10.1.1.2, which restricts high availability manager
communications to that IP address. Text IP addresses can be used if the host
is configured to use either a single IP address or multiple IP addresses.
- A string host name of the form myhost.mydomain . A string
host name cannot be used if the host is configured to use multiple IP addresses.
- Specify a range of multicast group IP addresses that the high availability
manager can use for communications within the core group. If the
core group transport is configured as multicast, you must associate a range
of IP address for high availability manger communications, and you must use
core group properties to specify this range of IP addresses. Do not specify
them on a per process basis.
- In the administrative console, click Servers > Core groups
> Core group settings
- Select the core group.
- In the Multicast group IP start field, specify the first IP
address in the range of IP addresses.
- In the Multicast group IP end field, specify the last IP address
in the range of IP addresses.
- Click Apply and then Save to save your changes.
Result
The high availability manager uses the specified IP address or range
of IP addresses for communications within the core group.