LSF_DUALSTACK_PREFER_IPV6
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.
Syntax
LSF_DUALSTACK_PREFER_IPV6=Y | y
Description
Restriction: IPv4-only and IPv6-only hosts cannot belong to the same cluster. In a
IBM®
Spectrum LSF multicluster capability
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.
- Define the parameter LSF_ENABLE_SUPPORT_IPV6 in the lsf.conf file.
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).
See also
LSF_ENABLE_SUPPORT_IPV6