AudioCodes Mediant 500 E-SBC, User Manual

Page: 528 / 920

User's Manual 528 Document #: LTRT-10437
Mediant 500 E-SBC

If the two devices are connected through two (or more) isolated LAN switches (i.e.,
packets from one switch cannot traverse the second switch), configure the mode to
2RX/2TX :
Figure 32-3: Redundancy Mode for Two Isolated Switches
Notes:
•
When two LAN switches are used, the LAN switches must be in the same subnet
(i.e., broadcast domain).
•
To configure Rx/Tx modes of the Ethernet ports, see ''Network Topology Types
and Rx/Tx Ethernet Port Group Settings'' on page
527 .
32.1.2 Configuring the HA Devices
This section describes how to initially configure the two devices comprising the HA system.
This configuration is done in the following chronological order:
1. Configuring the first device for HA - see ''Step 1: Configure the First Device'' on page
529
2. Configuring the second device for HA - see ''Step 2: Configure the Second Device'' on
page
531
3. Activating HA on the devices - see ''Step 3: Initialize HA on the Devices'' on page 532
Notes:
•
The HA feature is available only if both devices are installed with a Software
License Key that includes this feature. For installing a Software License Key, see
''Software License Key'' on page
572 .
•
The hardware configuration of the two devices must be identical; they must have
the same amount and type of telephony interfaces, housed in the same chassis
slot location.
•
The physical connections of the first and second devices to the network (i.e.,
Maintenance interface and OAMP, Control and Media interfaces)
must be
identical . This also means that the two devices must also use the same Ethernet
Port Groups and the port numbers belonging to these Ethernet Port Groups. For
example, if the first device uses Ethernet Port Group 1 (with ports 1 and 2), the
second device must also use Ethernet Port Group 1 (with ports 1 and 2).
•
Before configuring HA, determine the required network topology, as described in
''Network Topology Types and Rx/Tx Ethernet Port Group Settings'' on page
527 .
•
The Maintenance network should be able to perform a fast switchover in case of
link failure and thus, Spanning Tree Protocol (STP) should not be used in this
network; the Ethernet connectivity of the Maintenance interface between the two
devices should be constantly reliable without any disturbances.