Users Guide
21
High Availability (HA)
High availability (HA) in the Dell Networking OS is the conguration synchronization to minimize recovery time in the event of a route
processor module (RPM) failure.
In general, a protocol is dened as “hitless” in the context of an RPM failure/failover and not failures of a line card, SFM, or power
module. A protocol is dened as hitless if an RPM failover has no impact on the protocol.
You must specically enable some protocols for HA. Some protocols are only hitless if related protocols are also enabled as hitless
(for example, using the redundancy protocol command).
patch ash://RUNTIME_PATCH_DIR
Insert an In-Service Modular Hot-Fix patch.
S4810
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-specic. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.2.1.0 Introduced.
Usage Information
The patch lename includes the Dell Networking OS version, the platform, the CPU, and the process it
aects (FTOS-platform-cpu-process-patchversion.rtp). For example, a patch labeled “7.8.1.0-
EH-rp2-l2mgr-1.rtp” identies that this patch applies to Dell Networking OS version 7.8.1.0 — E-Series
platform, for RP2, addressing the layer 2 management process, and this patch is the rst version of this
patch.
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High Availability (HA)