Use IPv6 addresses

About this task

IP addresses can have either a dotted quad notation (IPv4) or IP Next Generation (IPv6) format. You can use IPv6 addresses if you define the parameter LSF_ENABLE_SUPPORT_IPV6 in lsf.conf; you do not have to map IPv4 addresses to an IPv6 format.

For the list of platforms on which LSF supports IPv6 addresses, see the Release Notes for IBM Platform LSF for this version.

Enable both IPv4 and IPv6 support


Configure the parameter LSF_ENABLE_SUPPORT_IPV6=Y in lsf.conf.

Configure hosts for IPv6

About this task

Follow the steps in this procedure if you do not have an IPv6-enabled DNS server or an IPv6-enabled router. IPv6 is supported on some linux2.4 kernels and on all linux2.6 kernels.


  1. Configure the kernel.
    1. Check that the entry /proc/net/if_inet6 exists.
    2. If it does not exist, as root run: modprobe ipv6
    3. To check that the module loaded correctly, execute the command lsmod | grep -w ’ipv6’
  2. Add an IPv6 address to the host by executing the following command as root:/sbin/ifconfig eth0 inet6 add 3ffe:ffff:0:f101::2/64
  3. Display the IPv6 address using ifconfig.
  4. Repeat all steps for other hosts in the cluster.
  5. Add the addresses for all IPv6 hosts to /etc/hosts on each host.

    For IPv6 networking, hosts must be on the same subnet.

  6. Test IPv6 communication between hosts using the command ping6.