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Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

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Configuring HA<br />

16-6 High Availability<br />

If you configured a primary-standby configuration, when the<br />

<strong>Sidewinder</strong> <strong>G2</strong> that is configured as the primary is powered on or<br />

reactivated, it will begin sending a heartbeat message. When the<br />

standby (temporarily acting as the primary) receives the heartbeat<br />

message, it immediately drops the cluster common IP addresses so the<br />

primary can again assume responsibility. Established connections<br />

through the standby will continue to run for a period <strong>of</strong> time, but<br />

eventually all traffic will again pass through the primary. (In a peer-topeer<br />

configuration, the <strong>Sidewinder</strong> <strong>G2</strong> that takes over as the acting<br />

primary will remain as the primary until it becomes unavailable.)<br />

Note: When a takeover event occurs, there can be a number <strong>of</strong> netprobe events detected<br />

when connections take time to detect the switch <strong>of</strong> systems.<br />

Configuring HA This section provides the basic information you need to configure an<br />

HA cluster. Before you begin, sketch a diagram showing your planned<br />

configuration (similar to the diagram in Figure 16-1) for reference.<br />

Include the following items on your diagram:<br />

interfaces<br />

IP addresses<br />

HA cluster common IP addresses<br />

burb names<br />

Before you configure HA, the following conditions must be met:<br />

Both <strong>Sidewinder</strong> <strong>G2</strong>s must be at the same version.<br />

A dedicated heartbeat burb and interface must be configured on<br />

each <strong>Sidewinder</strong> <strong>G2</strong>.<br />

Note: For load sharing HA, the interface used for the heartbeat burb must be at<br />

least as fast as the fastest load sharing interfaces on your <strong>Sidewinder</strong> <strong>G2</strong>. For<br />

information on configuring the heartbeat burb, see “Configuring the heartbeat<br />

burbs” on page 16-7.<br />

The following areas must be configured identically on both<br />

<strong>Sidewinder</strong> <strong>G2</strong>s before you configure HA:<br />

— number and types <strong>of</strong> interfaces<br />

— number <strong>of</strong> burbs<br />

— burb names (burb names are case-sensitive)<br />

— burb indices<br />

— user-defined proxies

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