1-9
Cisco ASA Series CLI Configuration Guide
Chapter 1 Information About Failover
Stateless (Regular) and Stateful Failover
Note
The ASA 5505 does not support multiple context mode or Active/Active failover.
VPN is not supported in multiple context mode or Active/Active failover.
If you are running the ASA in multiple context mode, then you can configure either Active/Active
failover or Active/Standby failover.
•
To allow both members of the failover pair to share the traffic, use Active/Active failover. Do not
exceed 50% load on each device.
•
If you do not want to share the traffic in this way, use Active/Standby or Active/Active failover.
provides a comparison of some of the features supported by each type of failover
configuration:
Stateless (Regular) and Stateful Failover
The ASA supports two types of failover, regular and stateful. This section includes the following topics:
•
Stateless (Regular) Failover, page 1-9
•
Stateless (Regular) Failover
When a failover occurs, all active connections are dropped. Clients need to reestablish connections when
the new active unit takes over.
Note
Some configuration elements for clientless SSL VPN (such as bookmarks and customization) use the
VPN failover subsystem, which is part of Stateful Failover. You must use Stateful Failover to
synchronize these elements between the members of the failover pair. Stateless (regular) failover is not
recommended for clientless SSL VPN.
Table 1-1
Failover Configuration Feature Support
Feature
Active/Active
Active/Standby
Single Context Mode
No
Yes
Multiple Context Mode
Yes
Yes
Traffic Sharing Network Configurations
Yes
No
Unit Failover
Yes
Yes
Failover of Groups of Contexts
Yes
No
Failover of Individual Contexts
No
No
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: ......