21High Availability (HA)High availability (HA) in the Dell Networking operating software is configuration synchronization tominimize recovery time in the event of a route processor module (RPM) failure. The feature is available onthe S4810 platform.In general, a protocol is defined as “hitless” in the context of an RPM failure/failover and not failures of aline card, SFM, or power module. A protocol is defined as hitless if an RPM failover has no impact on theprotocol.You must specifically enable some protocols for HA. Some protocols are only hitless if related protocolsare also enabled as hitless (for example, the redundancy protocol command).patch flash://RUNTIME_PATCH_DIRInsert an In-Service Modular Hot-Fix patch.S4810Syntax patch flash://RUNTIME_PATCH_DIR/patch-filenameTo remove the patch, use the no patch flash://RUNTIME_PATCH_DIR/patch-filename command.Defaults noneCommandModesCONFIGURATIONCommandHistoryThis 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.Version8.3.19.0Introduced on the S4820T.Version8.3.12.0Introduced on the S4810.Version 8.2.1.0 Introduced.UsageInformationThe patch filename includes the Dell Networking OS version, the platform, theCPU, and the process it affects (FTOS-platform-cpu-process-patchversion.rtp). For example, a patch labeled “7.8.1.0-EH-rp2-l2mgr-1.rtp”High Availability (HA) 693
