Appendix F: Ms Disaster Recovery; Overview; Installation Requirements; Installing The Standby Ms - Extreme Networks Sentriant AG Software User's Manual

F MS Disaster Recovery

Overview

If the Primary Management Server (primary MS) goes down due to an unrecoverable hardware failure,
management server duties can be migrated to an online Standby Management Server (standby MS)
using a simple backup and restore process. After failover, the standby MS is able to perform all
necessary MS functions, including communicating with Enforcement Servers (ESs), reporting, and
making configuration changes. The Sentriant AG backup/restore process migrates the endpoint activity
database, GUI users/passwords, and other product configuration items, but does not include system
level customizations such as root and non-root user accounts or passwords.

Installation Requirements

The following items are required as part of the installation of Sentriant AG and are essential elements
for recovery of an MS.
Primary and Standby Management Servers must each have their own unique license keys, with
●
equivalent settings (number of ESs and endpoints)
Primary and Standby Management Servers must be assigned an Internet Protocol (IP) address within
●
the same network (so that when the standby MS temporarily assumes the primary MS's IP, it is
accessible on the network)

Installing the Standby MS

A standby MS may need to be installed for the recovery of a failed MS. Allow for proper configuration
your hardware and software to accommodate the following items in setup of a standby MS:
The standby MS should be installed to match the primary MS configuration:
●
Same version of Sentriant AG
■
Same version of test update RPM (RedHat Package Manager)
■
Same version of BIND (DNS server software) plus any other customizations
■
Standby MS should be installed with its own:
●
IP address (different than that of the Primary MS)
■
License to use without an Internet Connection
■
Administrative UI user
■
NOTE
Only an administrative user needs to be created. Other UI users are migrated as part of the backup and restore
process. Be sure to keep this UI login information safe, as it is Needed to transition MS services to the standby MS.
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