Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

About the Local
Parameters tab
Chapter 17: High Availability
Managing an HA cluster
The Local Parameters tab specifies the parameters that are unique to a
particular Sidewinder G2 in your HA configuration. Follow the steps below.
1 In the Cluster Mode area, select one of the following options:
• Designate as part of a Load Sharing High Availability Cluster—Select
this option if you want to configure load sharing HA (both Sidewinder
G2s actively process traffic).
• Designate as part of a Primary/Standby High Availability Cluster—
Select this option if you want to configure failover HA (only one
Sidewinder G2 processes traffic, with the other Sidewinder G2 acting as
a hot backup).
Note: To configure load sharing HA or peer-to-peer failover HA, the Sidewinder
G2s must have the same hardware configuration. For more information on each
HA configuration option, see “HA configuration options” on page 489.
2 [Conditional] If you selected Primary-Standby in the previous step, select
one of the following options in the Cluster Mode area:
• Primary—Select this option if this will be the primary in your network.
(This option is only used for the dedicated primary-standby HA
configuration.)
• Standby—Select this option if this Sidewinder G2 is a standby in your
network, or if you are configuring peer-to-peer HA.
Note: For peer-to-peer HA, you must configure each Sidewinder G2 as a
standby.
3 In the Control field, select Enabled to enable HA for this Sidewinder G2. (To
disable HA, select Disabled.)
Note: You must reboot before the HA configuration will take effect.
4 [Conditional] In the Takeover Time field specify the number of seconds that
the primary must be unavailable before the secondary/standby will begin
the takeover process.
Note: If the primary in an HA cluster goes into failure mode and the secondary/
standby is not available, the primary will remain as the primary, but the
Takeover Time value for that Sidewinder G2 will change to one, ensuring that if
a secondary/standby becomes available, it can take over as the primary.
The secondary/standby Takeover Time value will differ depending on the
type of HA configuration you are using:
• Load sharing Takeover Time—The takeover time for load sharing HA
cluster Sidewinder G2s must be the same for EACH Sidewinder G2 that
is participating in the HA configuration. The default value is 13 seconds
for load sharing configurations.
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