CHAPTER41 HA Configuration
Mediant 800 Gateway & E-SBC | User's Manual
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.
b. 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 HA Preempt feature, see Device
Switchover upon Failure.
7. Burn the configuration to flash without a reset.
8. Power down the device.
9. Continue to Step 3: Initialize HA on the Devices.
Step 3: Initialize HA on the Devices
Once you have configured both devices for HA as described in the previous sections, follow the
procedure below to complete and initialize HA so that the devices become operational in HA. This
last stage applies to both devices.
➢ To initialize the devices for HA:
1. Cable the devices to the network.
You must connect both ports (two) in the Ethernet Group of the Maintenance interface
to the network (i.e., two network cables are used). This provides 1+1 Maintenance port
redundancy.
2. Power up the devices; the redundant device synchronizes with the active device and updates
its configuration according to the active device. The synchronization status is indicated as
follows:
● Active device: The Web interface's Monitor page displays "Synchronizing" in the 'HA
Status' field.
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