HP Serviceguard Quorum Server Version A.04.00 Release Notes, May 2014

more than one subnet for communication with the Quorum Server, this must be true for all
subnets.) This helps to ensure that the Quorum Server is available when it is needed.
If this is not practical, or if the communication must cover a long distance (for example, if the
Quorum Server is serving an Extended Distance cluster) heavy network traffic or network
delays could cause Quorum Server timeouts. You can reduce the likelihood of timeouts by
increasing the Quorum Server timeout interval; use the QS_TIMEOUT_EXTENSION parameter
in the cluster configuration file. See “Configuring Serviceguard to Use the Quorum Server”
(page 13) and “Setting Quorum Server Parameters in the Cluster Configuration File” (page 14).
• If a subnet that connects the Quorum Server to a cluster is also used for the cluster heartbeat,
configure the heartbeat on at least one other network, so that both Quorum Server and
heartbeat communication are not likely to fail at the same time.
Compatibility with Serviceguard Versions
This version of the Quorum Server supports:
• Serviceguard clusters running Serviceguard A.11.14 or later on HP-UX 11i v1, 11i v2 or 11i
v3.
• Serviceguard clusters running Serviceguard A.11.14 or later on supported Red Hat or SUSE
Linux distributions.
IMPORTANT:
• The alternate-subnet capability is available only for Serviceguard A.11.17 on:
◦ HP-UX 11i v2 with patch PHSS_35427
◦ HP-UX 11i v2
◦ HP-UX 11i v3
◦ Serviceguard A.11.18 for Linux (with October 2007 or later patch) and A.11.19
See “How the Quorum Server Works?” (page 6) for information about the difference in
implementation between A.11.19 and the earlier releases.
See the latest version of the corresponding Serviceguard A.11.18 Release Notes for required
patches for Serviceguard A.11.18.
• Quorum Server version A.04.00 is required if you are using an alternate subnet for
communication with a Serviceguard A.11.19 or later cluster, and must be installed before
you upgrade the cluster to A.11.19.
• If you are running Serviceguard A.11.19 or later, and want to use an IPv6 connection between
the cluster and the Quorum Server, you must apply the July 2009 patch to Serviceguard. See
the latest Serviceguard release notes for information about this patch.
The patch is required for IPv6-only clusters, but it is also possible to configure IPv6 connections
without the patch; see “Configuring IPv6 Addresses without the July 2009 Patch” (page 15)
for instructions.
• You will need to apply Cluster Object Manger (COM) patch PHSS_35372 in order to use
the older, station-management version of Serviceguard Manager to manage a cluster that uses
more than one subnet for communication with the Quorum Server.
For complete compatibility information, see the Quorum Server Compatibility Matrix available at
http://www.hp.com/go/hpux-serviceguard-docs—> HP Serviceguard Quorum
Server Software.
Compatibility with Serviceguard Versions 9