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1-4
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Active/Standby Failover
Information About Active/Standby Failover
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Note
Changes made on the standby unit are not replicated to the active unit. If you enter a command on the
standby unit, the ASA displays the message
**** WARNING **** Configuration Replication is NOT
performed from Standby unit to Active unit. Configurations are no longer synchronized.
This message appears even when you enter many commands that do not affect the configuration.
If you enter the
write standby
command on the active unit, the standby unit clears its running
configuration (except for the failover commands used to communicate with the active unit), and the
active unit sends its entire configuration to the standby unit.
For multiple context mode, when you enter the
write standby
command in the system execution space,
all contexts are replicated. If you enter the
write standby
command within a context, the command
replicates only the context configuration.
Replicated commands are stored in the running configuration.
Note
Standby Failover does not replicate the following files and configuration components:
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AnyConnect images
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CSD images
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ASA images
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AnyConnect profiles
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Local Certificate Authorities (CAs)
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ASDM images
To save the replicated commands to the flash memory on the standby unit, standby unit, do the following:
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For single context mode, enter the
copy running-config startup-config
command on the active unit.
The command is replicated to the standby unit, which proceeds to write its configuration to flash
memory.
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For multiple context mode, enter the
copy running-config startup-config
command on the active
unit from the system execution space and within each context on disk. The command is replicated
to the standby unit, which proceeds to write its configuration to flash memory. Contexts with startup
configurations on external servers are accessible from either unit over the network and do not need
to be saved separately for each unit. Alternatively, you can copy the contexts on disk from the active
unit to an external server, and then copy them to disk on the standby unit.
Failover Triggers
The unit can fail if one of the following events occurs:
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The unit has a hardware failure or a power failure.
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The unit has a software failure.
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Too many monitored interfaces fail.
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You force a failover. (See the
“Forcing Failover” section on page 1-16
.)
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......