Configuring The Heartbeat Interval And Count - Cisco ACE-4710-K9 Administration Manual

Chapter 7 Configuring Redundant ACE Appliances

Configuring the Heartbeat Interval and Count

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The vlan_id argument specifies the identifier of an existing VLAN. Enter an
integer from 2 to 4094.
For example, enter:
host1/Admin(config-ft-peer)# ft-interface vlan 200
To remove the FT VLAN from the peer configuration, enter:
host1/Admin(config-ft-peer)# no ft-interface vlan 200
The heartbeat interval determines the frequency in milliseconds (ms) at which the
active member of the FT group sends the heartbeat packets to the standby member.
The heartbeat count is the number of missed heartbeats that the standby member
must detect before determining that the active member is not available. To
configure the heartbeat interval and count, use the heartbeat command in peer
configuration mode. The syntax of this command is:
heartbeat {count number | interval frequency}
The keywords and arguments are:
count number—Specifies the number of heartbeat intervals that must
•
transpire with no heartbeat packet received by the standby member before the
standby member determines that the active member is not available. Enter an
integer from 10 to 50. The default is 10 heartbeat intervals. If the standby
member of the FT group does not receive a heartbeat packet from the active
member, a time period equal to count number times interval frequency must
elapse before a switchover can occur. For example, in the default case, where
the heartbeat frequency is 300 ms and the heartbeat count is 10, if the standby
member does not receive a heartbeat packet from the active member for
3000 ms (3 seconds), a switchover occurs.
interval frequency—Specifies the interval in milliseconds (ms) between
•
heartbeats. Enter an integer from 100 to 1000 ms. The default is 300 ms.
For example, to set the heartbeat count to 20, enter:
host1/Admin(config-ft-peer)# heartbeat count 20
To reset the heartbeat count to the default of 10, enter:
host1/Admin(config-ft-peer)# no heartbeat count
Cisco 4700 Series Application Control Engine Appliance Administration Guide
Configuring Redundancy
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