
5-5
Cisco Catalyst 4000 Access Gateway Module Installation and Configuration Note
OL-3008-01
Chapter 5 Configuring the Voice Interfaces
MGCP Configuration
To configure gateway switchback, enter the following command:
Gateway(config)#ccm-manager switchback
{graceful|imm[ediate]|sch[edule-time] hh:mmm|uptime[-delay] minutes}
During switchover and switchback, Cisco CallManager maintains active connected calls. Transient calls
(calls in progress or on hold without an active voice connection) are torn down. An exception applies
for PRI interfaces that MGCP controls, in which case both active and transient calls are torn down during
switchover and switchback. Table 5-1 describes each switchback option.
You can also manually redirect a Cisco voice gateway to the backup Cisco CallManager server by
entering the following command:
Gateway(config)#ccm-manager switchover-to-backup
In this case, the switchover will occur immediately. This command will not switch the gateway to the
backup Cisco CallManager server if you have the switchback option set to immediate and the primary
Cisco CallManager server is still running.
To view the current configuration of a Cisco voice gateway, enter the show ccm-manager command
from privileged EXEC mode.
Table 5-1 Switchback Command Options
Switchback Command Option Function
graceful The default value. Completes all
outstanding calls before returning the
gateway to the control of the primary
Cisco CallManager server.
immediate Returns the gateway to the control of
the primary Cisco CallManager server
without delay, as soon as the network
connection to the server is
reestablished.
schedule-time hh:mm Returns the gateway to the control of
the primary Cisco CallManager server
at the specified time, where hh:mm is
the time according to a 24-hour clock.
If the configured schedule time is
earlier than the time at which the
gateway reestablishes a network
connection to the primary server, the
switchback will occur at the specified
time on the following day.
uptime-delay minutes Returns the gateway to the control of
the primary Cisco CallManager server
when the primary server runs for a
specified number of minutes after a
network connection is reestablished to
the primary server. Permitted values
range from 1 to 1440 (1 minute to 24
hours).
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