Version 7.2 811 Mediant 800B Gateway & E-SBC
User's Manual 42. HA Configuration
b. In the 'HA Remote Address' field, enter the Maintenance IP address of the
second device.
c. Enable the HA Preempt feature by configuring the 'Preempt Mode' parameter to
Enable, and then setting the priority level of the device in the 'Preempt Priority'
field. Make sure that you configure different priority levels for the two devices.
Typically, you would configure the active device with a higher priority level
(number) than the redundant device. The only factor that influences the
configuration is which device has the greater number; the actual number is not
important. For example, configuring the active with 5 and redundant with 4, or
active with 9 and redundant with 2 both assign highest priority to the active
device. Configuring the level to 10 does not cause a switchover upon Ethernet
connectivity loss. For more information on the feature, see 'Device Switchover
upon Failure' on page 804.
6. Burn the configuration to flash without a reset.
7. Power down the device.
8. Configure the second device (see 'Step 2: Configure the Second Device' on page
811).
42.1.2.2 Step 2: Configure the Second Device
Once you have configured the first device for HA, you can configure the second device for
HA. As the configuration of the second device is similar to the first device, the following
procedure briefly describes each step. For detailed configuration such as the path to the
Web configuration pages, refer to the section on configuring the first device ('Step 1:
Configure the First Device' on page 809).
Note: During this stage, ensure that the first device is powered off or disconnected
from the network.
 To configure the second device for HA:
1. Connect to the device in the same way as you did with the first device.
2. Configure the same OAMP, Media, and Control interfaces as configured for the first
device.
3. Configure a Maintenance interface for this device. The IP address must be different to
that configured for the Maintenance interface of the first device. The Maintenance
interfaces of the devices must be in the same subnet.
4. Configure the same Ethernet Groups and VLAN IDs of the network interfaces as
configured for the first device.
5. Configure the same Ethernet port Tx / Rx mode of the Ethernet Group used by the
Maintenance interface as configured for the first device.
6. Configure HA parameters in the HA Settings page:
a. In the 'HA Remote Address' field, enter the Maintenance IP address of the first
device.
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