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High Availability (HA)High availability (HA) in the Dell Networking operating software is configuration synchronization to
minimize recovery time in the event of a route processor module (RPM) failure. The feature is available on
Dell Networking OS.
In general, a protocol is defined as “hitless” in the context of an RPM failure/failover and not failures of a
line card, SFM, or power module. A protocol is defined as hitless if an RPM failover has no impact on the
protocol.
You must specifically enable some protocols for HA. Some protocols are only hitless if related protocols
are also enabled as hitless (for example, the redundancy protocol command).
patch flash://RUNTIME_PATCH_DIR
Insert an In-Service Modular Hot-Fix patch.
S4820T
Syntax patch flash://RUNTIME_PATCH_DIR/patch-filename
To remove the patch, use the no patch flash://RUNTIME_PATCH_DIR/
patch-filename command.
Defaults none
Command
Modes
CONFIGURATION
Command
History This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.2.1.0 Introduced.
744 High Availability (HA)