Default Settings - Cisco 4700M Administration Manual

Default Settings

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Default Settings
Table 6-1
Table 6-1 Default Redundancy Parameters
Parameter
Connection replication
Heartbeat interval (frequency in milliseconds (ms) at which the active member of the FT
group sends the heartbeat packets to the standby member)
Heartbeat count (number of missed heartbeats that the standby member must detect
before determining that the active member is not available)
A member (context) of an FT group becomes the active member through an election
process based on the priority that you configure for the group on each peer. The group
member with the higher priority becomes the active member.
Priority setting of an FT group on the active member.
Priority setting of an FT group on the remote standby member.
Cisco 4700 Series Application Control Engine Appliance Administration Guide
6-6
The ACE does not support the stateful failover of any connections that are proxied. Such
connections include Layer 7 connections (including SSL), inspection, and HTTP compression.
Also, any connections that are candidates for compression in the VIP but are not being compressed
because of the mime type of the data, for example, will remain proxied and will not be supported by
stateful failover.
In a user context, the ACE allows a switchover only of the FT group that belongs to that context. In
the Admin context, the ACE allows a switchover of all FT groups in all configured contexts in the
appliance.
Do not use this dedicated VLAN for any other network traffic, including HSRP and data.
Redundancy uses a dedicated FT VLAN between re dundant ACEs to transmit flow-state information
and the redundancy heartbeat. You must configure this same VLAN on both peer appliances. You
also must configure a different IP address within the same subnet on each appliance for the FT
VLAN.
The IP address and the MAC address of the FT VLAN do not change at switchover.
For redundancy to function properly, both members of an FT group must have identical
configurations. Ensure that both ACE appliances include the same bandwidth software license (2G
or 1G) and the same virtual context software license. If there is a mismatch in a software license
between the two ACE appliances in an FT group, the following operational behavior can occur:
If there is a mi s match in the virtual context software license, synchronization between the active
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ACE and standby ACE may not work properly.
If both the active and the standby ACE appliances have the same vir tual context software license
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but have a different bandwidth software license, synchronization will work properly but the
standby ACE may experience a potential loss of traffic on switchover from the 2G ACE
appliance to the 1G ACE appliance.
For details about the available ACE software licenses, see
Licenses.
lists the default settings for the ACE redundancy parameters.
Chapter 6 Configuring Redundant ACEs
Chapter 3, Managing ACE Software
Default
Enabled
300 ms
10
The group member with the higher
priority becomes the active
member.
100
100
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