HP Serviceguard Version A.11.19 Release Notes, July 2009

Table Of Contents
Recommendation for IPv6-Only Mode
If you decide to migrate the cluster to IPv6-only mode, you should plan to do so while
the cluster is down.
Rules and Restrictions for Mixed Mode
The hostname resolution file on each node (for example, /etc/hosts) must
contain entries for all the IPv4 and IPv6 addresses used throughout the cluster,
including all STATIONARY_IP and HEARTBEAT_IP addresses as well any private
addresses. There must be at least one IPv4 address in this file (in the case of /etc/
hosts, the IPv4 loopback address cannot be removed).
In addition, the file must contain the following entry:
::1 localhost ipv6-localhost ipv6-loopback
For more information and recommendations about hostname resolution, see
“Configuring Name Resolution” in Chapter 5 of Managing Serviceguard.
You must use $SGCONF/cmclnodelist, not ~/.rhosts or /etc/hosts.equiv,
to provide root access to an unconfigured node.
See Allowing Root Access to an Unconfigured Node” in Chapter 5 of Managing
Serviceguard for more information.
Hostname aliases are not supported for IPv6 addresses, because of operating
system limitations.
NOTE: This applies to all IPv6 addresses, whether
HOSTNAME_ADDRESS_FAMILY is set to IPV6 or ANY.
Cross-subnet configurations are not supported.
This also applies if HOSTNAME_ADDRESS_FAMILY is set to IPV6. See About
Cross-Subnet Configurations” (page 37) for more information.
CFS, CVM, VxVM, and VxFS are not supported.
NOTE: This also applies if HOSTNAME_ADDRESS_FAMILY is set to IPV6.
HPVM is not supported.
You cannot have a virtual machine that is either a node or a package if
HOSTNAME_ADDRESS_FAMILY is set to ANY or IPV6.
Restrictions if You Have Not Applied the July 2009 Patch
A.11.19 without the patch supports only IPv4–only and mixed-mode clusters; you
cannot configure an IPv6–only cluster.
In addition, you cannot use cmquerycl -q to configure IPv6 addresses (or hostnames
that resolve only to IPv6 addresses) for QS_HOST and QS_ADDR. You must generate
26 Serviceguard Version A.11.19 Release Notes