Deployment Guide

High Availability (HA) | 551
21
High Availability (HA)
Overview
High Availability (HA) in Dell Networking OS is configuration synchronization to minimize recovery
time in the event of a Route Processor Module (RPM) failure. The feature is available on the C-Series
and E-Series where noted by these symbols under command headings: c e
Dell Networking OS on the E-Series supports RPM 1 + 1 redundancy. The Primary RPM performs all
routing and control operations, while the Secondary RPM is online and monitoring the Primary RPM.
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.
Some protocols must be specifically enabled for HA, and some protocols are only hitless if related
protocols are also enabled as hitless (see the redundancy protocol command).
High Availability is supported on E-Series ExaScale e
x
with Dell Networking OS 8.1.1.0. and later.
Commands
The HA commands available in Dell Networking OS are:
• patch flash://RUNTIME_PATCH_DIR
• process restartable
• redundancy auto-failover-limit
• redundancy disable-auto-reboot
• redundancy force-failover
• redundancy primary
• redundancy protocol
• redundancy reset-counter
• redundancy sfm standby
• redundancy synchronize
• show patch
• show processes restartable
• show redundancy