Installation & Operation Manual 258 Document # LTRT-92224
Mediant 8000
28.5.7 Automatic Switchback
The Media Gateway may be configured to perform automatic activity switchback from
the Redundant Media Gateway board back to the failed board, as soon as the later
returns to service. This configuration reduces the manual workload performed by the
operator upon the Media Gateway board switchover. It also releases the Redundant
board and therefore restores redundancy for the rest of the Media Gateway boards.
When automatic switchback is configured, the failed Media Gateway board is
automatically restarted after the switchover. When the Media Gateway board returns
to service, it's functionality is verified for a specified time period. If within that time
period, the Media Gateway board is stable, automatic switchback is performed.
Additional configuration parameters are provided to ensure that overall system stability
is not compromised by this feature.
To configure Automatic Switchback:
1. Click
to access the Media Gateway status screen.
2. In the Navigation pane, select Redundancy
Redundancy Groups; the
Redundancy Groups list is displayed.
3. Select a specific row and then in the configuration pane, click Redundancy
Group Settings; the Redundancy Group Settings screen is displayed.
4. In the Automatic Switchback tab, configure Automatic Switchback parameters
according to the table 'Automatic Switchback Parameters' below.
Table
28-3: Automatic Switchback Parameters
Parameter Name Type
Provisioning
Type Description
Automatic
Switchback
Enum
Disabled,
Enabled
Instant Defines whether automatic switchback
functionality is enabled.
Automatic
Switchback
Timeout
Integer
15-10080
Instant Defines the sanity time (in minutes) prior to
performing the automatic switchback. The
switchback is performed only if after the
failure Media Gateway board successfully
completes the restart, passes all sanity
tests and is stable for this pre-defined time
period.
Max Auto Switch
Back Per a Day
Integer
1-100
Instant Defines the maximum amount of automatic
switchbacks per day.
Use this parameter to prevent the system
from continuously switching between the
failed and redundant boards, in case a
problem on the failed board is not resolved.
Auto Switch Back Integer Read-Only Indicates the number of Automatic Switch
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