LSF Version 7.3 - Platform LSF Configuration Reference

LSF_DUALSTACK_PREFER_IPV6

Syntax

LSF_DUALSTACK_PREFER_IPV6=Y | y

Description

Define this parameter when you want to ensure that clients and servers on dual-stack hosts

use IPv6 addresses only. Setting this parameter configures LSF to sort the dynamically created

address lookup list in order of AF_INET6 (IPv6) elements first, followed by AF_INET (IPv4)

elements, and then others.

Restriction:

IPv4-only and IPv6-only hosts cannot belong to the same cluster.

In a MultiCluster environment, you cannot mix IPv4-only and

IPv6-only clusters.

Follow these guidelines for using IPv6 addresses within your cluster:

•

Define this parameter only if your cluster

•

Includes only dual-stack hosts, or a mix of dual-stack and IPv6-only hosts, and

•

Does not include IPv4-only hosts or IPv4 servers running on dual-stack hosts (servers

prior to LSF version 7)

Important:

Do not define this parameter for any other cluster configuration.

•

Within a MultiCluster environment, do not define this parameter if any cluster contains

IPv4-only hosts or IPv4 servers (prior to LSF version 7) running on dual-stack hosts.

•

Applications must be engineered to work with the cluster IP configuration.

•

If you use IPv6 addresses within your cluster, ensure that you have configured the dual-

stack hosts correctly. For more detailed information, see Administering Platform LSF.

•

Define the parameter LSF_ENABLE_SUPPORT_IPV6 in lsf.conf.

Default

Not defined. LSF sorts the dynamically created address lookup list in order of AF_INET (IPv4)

elements first, followed by AF_INET6 (IPv6) elements, and then others. Clients and servers

on dual-stack hosts use the first address lookup structure in the list (IPv4).