AudioCodes Mediant 3000, User Manual

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Version 6.6 505 Mediant 3000
User's Manual 34. HA Overview
34.2 Configuration Stages
For the device to be configured for HA, the following installation stages must be performed:

Hardware configuration setup (refer to Mediant 3000 and IPmedia 3000 Installation
Manual ). The system can be set up initially with only one VoP blade and one SA/M3K
blade. However, HA mode is only functional when a second VoP blade and a second
SA/M3K blade are added.

Software License Key includes the HA feature and is installed on both VoP blades
(see 'Software License Key' on page
542 ). (If the HA feature is specified at the time
the system was purchased, then it's already included on both blades).

The device's global IP addresses (i.e., Control, Media, and OAMP) are defined (using
the Multiple Interface table) for the active blade to a valid IP address that is different to
that of the local IP addresses of the blades. In the HA system, when the blades are
initially configured using BootP, the BootP communicates with the two blades using
two different local IP addresses: one for the active and one for the redundant blade.
However, the device's global (system) IP addresses are later used for communicating
with the IP network.
•
Private (local) IP address: A single IP address (and subnet) per blade that is
acquired through BootP/DHCP and used for maintenance only. It should be
configured once (on initial installation of the system). It can later be changed
through BootP/DHCP or CLI. This local address is also used as a fallback in case
of major system problems which prevents the system from operating in HA mode.
•
System (global) IP address: IP addresses (i.e., Control, Media, and OAMP) of
the HA system configured using the Multiple Interface table.
Note that in HA, the private IP addresses are used only when major failure
occurs, whereby the blades can report to a Syslog server.
Note: It is recommended to define the local private IP addresses of the blades in
the same subnet as that of the device's OAMP interface. This allows the
device's blade to send reports to a Syslog server in case of major device
failure.

The Mediant 3000 HA is loaded from flash (when loading from BootP/TFTP on first
configuration setup, HA is disabled).