Technical Considerations for a Serviceguard Cluster that Spans Multiple IP Subnets, July 2009

Introduction

Executive summary

In earlier releases, Serviceguard has required that all nodes in the cluster be on the same IP subnet

and that all the interfaces on the same subnet must be connected at the link level. This requirement

could be restrictive, particularly for clusters that extend across sites separated by a long distance, or

for clusters on a single site that have to follow strict security policies.

This white paper discusses technical considerations for creating a cross-subnet configuration in a

Serviceguard cluster. It identifies the benefits of such configurations as well as the challenges,

requirements and restrictions. It also discusses application deployment and client connectivity issues

and how to manage them.

It is assumed that readers of this paper are familiar with Serviceguard and multi-site Disaster

Tolerance products such as Metrocluster.

Related documents

The following documents provide background information on the technology discussed in this white

paper:

 HP Technical Documentation on Continentalclusters

http://docs.hp.com/ -> High Availability -> Continentalclusters

 Designing Disaster Tolerant HA Clusters Using Metrocluster and Continentalclusters, March 2009

http://docs.hp.com/ -> High Availability -> Continentalclusters

 HP Technical Documentation on Serviceguard

http://docs.hp.com/ -> High Availability -> Serviceguard

 HP Serviceguard Version A.11.19 Release Notes, July 2009

http://docs.hp.com/ -> High Availability -> Serviceguard

 Managing Serviceguard Seventeenth Edition, July 2009

http://docs.hp.com/ -> High Availability -> Serviceguard

 HP-UX 11i TCP/IP Performance White Paper

http://docs.hp.com/ -> By OS Release -> 11i v3 -> Internet Transport

 HP Serviceguard NFS Toolkit A.11.31.02, A.11.11.06, and A.11.23.05 Administrator's Guide

http://docs.hp.com/ -> High Availability -> High Available NFS

 Managing Serviceguard Extension for SAP Version B.05.00, March 2009

http://docs.hp.com/ -> High Availability -> Serviceguard Extension for SAP

 Cisco GSS Configuration Guide

http://www.cisco.com/application/pdf/en/us/guest/products/ps4162/c2001/ccmigration_091

86a008014d20e.pdf

 Several documents on Oracle Maximum Availability Architecture available from:

http://www.oracle.com/technology/deploy/availability/htdocs/maa.htm

 Oracle Data Guard 10g Release 2 Best Practices for Client Failover

http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10gR2_ClientFailoverBest

Practices.pdf

 Workload Management with Oracle Real Application Clusters 10g

http://www.oracle.com/technology/products/database/clustering/pdf/twpracwkldmgmt.pdf

 Oracle Database High Availability Best Practices (Part #B25159)

http://otn.oracle.com/pls/db102/db102.to_toc?partno=b25159