Reference Guide

High Availability (HA) | 535
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High Availability (HA)
Overview
High Availability (HA) in FTOS 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 s and
FTOS 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 (Refer to the
redundancy protocol command).
High Availability is supported on the S-Series S4810 with FTOS 8.3.12.0 and
E-Series ExaScale
e
x
with FTOS 8.1.1.0. and later.
Commands
The HA commands available in FTOS 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