AudioCodes Mediant 500 E-SBC, User Manual

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Version 6.8 525 Mediant 500 E-SBC
User's Manual 31. HA Overview
Connectivity failure triggering a switchover can include, for example, one of the following:

Loss of physical (link) connectivity: If one or more physical network groups (i.e.,
Ethernet port pair) used for one or more network interfaces of the active device
disconnects (i.e., no link) and these physical network groups are connected OK on the
redundant device, then a switchover occurs to the redundant device.

Loss of network (logical) connectivity: No network connectivity, verified by keep-
alive packets between the devices. This applies only to the Maintenance interface.
Notes:
•
Switchover triggered by loss of physical connectivity in one or more Ethernet port-
group is not done if the active device has been set to a Revertive priority level of
10. In such a scenario, the device remains active despite the loss of connectivity in
one or more of its Ethernet port groups.
•
After HA switchover, the active device updates other hosts in the network about
the new mapping of its Layer-2 hardware address to the global IP address, by
sending a broadcast gratuitous Address Resolution Protocol (ARP) message.
31.3 HA Status on the Home Page
The Home page of the device's Web interface displays the status of the HA system. The
Home page provides a graphical display of both active and redundant devices.

Active device:
•
Color border: The active device is surrounded by a green border.
•
Title: The default title of the device is Active Device: "Device 1".

Redundant device:
•
Color border: The redundant device is surrounded by a blue border.
•
Title: The default title of the device is Redundant Device: "Device 2".
The title of each device can be configured as described below:

To define a name for the device:
1. Open the HA Settings page ( Configuration tab > System menu > HA Settings ).
2. In the 'HA Device Name' field, enter a name for the active device.
3. Click Submit .
Note: Once the devices are running in HA mode, you can change the name of the
redundant device, through the active device only, in the 'Redundant HA Device Name'
field.