High Availability (Ha); Component Redundancy; Rpm Redundancy - Dell S4820T Configuration Manual

High Availability (HA)

High availability (HA) is supported on Dell Networking OS.
HA is a collection of features that preserves system continuity by maximizing uptime and minimizing
packet loss during system disruptions.
To support all the features within the HA collection, you should have the latest boot code. The following
table lists the boot code requirements as of this Dell Networking OS release.
Table 29. Boot Code Requirements
Component
S4820T
The features in this collection are:
•

Component Redundancy

• Online Insertion and Removal
• Hitless Behavior
• Graceful Restart
• Software Resiliency
• Hot-Lock Behavior
Component Redundancy
Dell Networking systems eliminate single points of failure by providing dedicated or load-balanced
redundancy for each component.

RPM Redundancy

The current version of Dell Networking OS supports 1+1 hitless route processor module (RPM)
redundancy.
The primary RPM performs all routing, switching, and control operations while the standby RPM monitors
the primary RPM. In the event that the primary RPM fails, the standby RPM can assume control of the
system without requiring a chassis reboot.
This section contains the following sub-sections:
• Boot the Chassis with a Single RPM
• Boot the Chassis with Dual RPMs
High Availability (HA)
Boot Code
1 2.0.3
20
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