Viewing Ha Status On Monitor Web Page - AudioCodes Mediant 4000 SBC User Manual

User's Manual
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, 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.
Note:
•
Switchover triggered by loss of physical connectivity in one or more Ethernet
Group is not done if the active device has been configured to a Preempt mode
level of 10. In such a scenario, the device remains active.
•
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.
32.3

Viewing HA Status on Monitor Web Page

You can view the status of the HA system on the Monitor page of the device's Web
interface. The page provides a graphical display of both active and redundant devices, as
shown below:
You can distinguish between active and redundant devices as follows:

Active device:
•
Color of border surrounding device is green.
•
Title above device is "Active Device". The default name is "Device 1".

Redundant device:
•
Color of border surrounding device is blue.
•
Title above device is "Redundant Device". The default name is "Device 2".
Version 7.2 603
32. HA Overview
Mediant 4000 SBC