CHAPTER41 HA Configuration
Mediant 800 Gateway & E-SBC | User's Manual
● The HA feature is available only if both devices are installed with a License Key
that includes this feature. For installing a License Key, see License Key.
● The hardware configuration of the two devices must be identical; they must have
the same amount and type (e.g., E1/T1) 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
Groups and the port numbers belonging to these Ethernet Groups. For example, if
the first device uses Ethernet Group 1 (with ports 1 and 2), the second device must
also use Ethernet 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.
● 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.
Step 1: Configure the First Device
The first stage is to configure the first device for HA.
During this stage, make sure that the second device is powered off or disconnected
from the network.
➢ To configure the first device for HA:
1. Cable the device to the necessary PSTN interfaces (e.g., E1/T1).
2. Configure the network interfaces, including the default OAMP interface:
a. Connect your PC to the device using a local, direct physical cable connection and then
access the Web interface using the default OAMP network address. For more information
on initial access, see Assigning the OAMP IP Address.
b. Open the IP Interfaces table (see Configuring IP Network Interfaces).
c. Change the default OAMP network settings to suit your networking scheme.
d. Configure the Control and Media network interfaces, as required.
e. Add the HA Maintenance interface (i.e., the MAINTENANCE Application Type).
Make sure that the Maintenance interface uses an Ethernet Device and Ethernet Group
that is not used by any other IP network interface. The Ethernet Group is associated
with the Ethernet Device, which is assigned to the interface.
The IP Interfaces table below shows an example where the Maintenance interface is configured
with Ethernet Device "vlan 2" (which is associated with Ethernet Group "GROUP_2"), while the
other interface is assigned "vlan 1" (associated with Ethernet Group "GROUP_1"):
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