Cisco ASA High Availability Concepts and Configurations | Introduction to ASA Failover and Failover Modes (2024)

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Last Update: November 17, 2020

Cisco ASA High Availability Concepts and Configurations | Introduction to ASA Failover and Failover Modes (2024)

FAQs

What are the modes of failover in ASA? ›

There are two types of Cisco ASA failover: Active/Standby failover and Active/Active failover. In an Active/Standby failover configuration, the primary unit handles all traffic while the secondary unit remains idle, continuously monitoring the primary unit's status.

What are the two modes in which Cisco ASA can be configured? ›

The ASA supports two firewall modes: Routed Firewall mode and Transparent Firewall mode.

What two features must match between ASA devices to implement a failover configuration? ›

What two features must match between ASA devices to implement a failover configuration? Software, licensing, memory, and interfaces, including the Security Services Module (SSM).

How to configure failover cluster in Cisco ASA? ›

ASA Failover rules:
  1. Maximum of 10 ms Round Trip Time between units.
  2. Each logical interface must be in same L2 segment.
  3. Each logical interface is IP addressed (active IP and standby IP)
  4. IP and MAC (virtual) is always maintained by the current active Unit.
  5. When failover occurs, ASA standby assumes active IP and MAC and sends.

What are the different types of configurations in failover? ›

Active-active and active-passive or active-standby are the most common configurations for high availability (HA). Each implementation technique achieves failover in a different way, although both improve reliability.

How to configure HA in ASA? ›

In ASDM, navigate to Configuration > Device Management > High Availability and Scalability > Failover > Criteria > Interface Policy to configure this.

What are the configuration modes in Cisco? ›

There are five command modes: global configuration mode, interface configuration mode, subinterface configuration mode, router configuration mode, and line configuration mode. After an EXEC session is established, commands within Cisco IOS Software are hierarchically structured.

What are the different types of Cisco mode? ›

Entering and exiting in different modes:
ModesAccess method
user execution modelogin
privilege modeuse enable command in user mode
global configuration modeuse configure terminal command
Interface modeuse interface command and specify an interface in global configuration mode
1 more row
Mar 15, 2023

What is the difference between ASA routed mode and transparent mode? ›

The main difference is that routed works at Layer 3 and transparent works at Layer 2. When the ASA is in routed mode the networks that are connected to the ASA on two interfaces need to be on different subnets. While in transparent mode the subnets can be the same.

What are the failover requirements between two devices? ›

Enable device failover is used to establish an automatic device failover mode using two identical physical output devices. A hardware cable link is required between the output devices failover links. If failover mode is used, the devices must be configured as the same models in the Software Layout.

How do you troubleshoot an ASA failover? ›

If the ASA does not receive a response on the failover link, but it does receive a response on a data interface, then the unit does not failover. The failover link is marked as failed. You can restore the failover link as soon as possible because the unit cannot failover to standby while the failover link is down.

What is the difference between failover link and stateful link? ›

The failover link is a dedicated connection between the two units. The stateful failover link is also a dedicated connection, but you can either use the one failover link as a combined failover/state link, or you can create a separate, dedicated state link.

What is the difference between cluster and failover in Cisco ASA? ›

1 Answer. The active/active cluster allows you to split traffic into groups so the A node handles traffic for some networks while the B node handles traffic for the others, in the event of a failover the stable unit will handle traffic for both A&B traffic groups (assigned on a per context basis).

What is the failover cluster feature? ›

Introduction. Microsoft Failover Clustering is a feature of Windows server operating systems. It is the software that supports the connection of two servers (up to four servers in Datacenter Server) into a cluster for high availability and easier management of data and applications.

How do you configure a failover group? ›

Provide a Failover group name. Choose an existing secondary server. The secondary server in the failover group must be in a different region than the primary server, and contain an elastic pool with the same name as the primary server. Select Configure database to open the Databases for failover group page.

How many types of failover are there? ›

Three forms of failover exist: automatic failover (without data loss), planned manual failover (without data loss), and forced manual failover (with possible data loss), typically called forced failover. Automatic and planned manual failover preserve all your data.

What are the different types of failover in firewall? ›

In active-passive HA, failover occurs when the primary device becomes unavailable and the auxiliary device starts processing all the traffic. In active-active HA, failover occurs when either of the devices becomes unavailable. The peer device then starts processing all the traffic.

What is failover mode? ›

Failover is a backup operational mode in which the functions of a system component are assumed by a secondary component when the primary becomes unavailable. An organization can fail over either after failure or during scheduled down time.

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