Cisco asa failover to secondary. Both failover modes support stateful or stateless failover.

Cisco asa failover to secondary Aug 7, 2019 · Hello, I have an active/ active pair of ASA with context enabled. Failover Types There Failover for High Availability This chapter describes how to configure Active/Standby or Active/Active failover to accomplish high availability of the ASA. You disable failover from the Secondary/Active and the Primary unit goes into Pseudo/Standby and the Secondary will maintain active connection role using the primary MAC addresses and IPs on the Secondary unit. I needed to reboot the Primary Active firewall so I performed a stateful failover which worked as expected. Sep 19, 2024 · I need to failover to compete a firmware upgrade, however when via the primary device I enter no failover active, rather than the secondary becoming the active device that happens is that the primary device becomes the secondary, but stays in an the active state. I'd like to take the secondary/failover and make it the primary/active and do this for good. I will refer 2 Firewall as FW-01 and FW-02. Sep 9, 2011 · 0001# sh failover Failover On Failover unit Secondary Failover LAN Interface: lan-fo GigabitEthernet0/2. We need to change the FW-01 permanently into primary active state. 1. Suddenly, the failover switch to the secondary and then back to primary. Jan 6, 2015 · Understanding Cisco ASA Failover 1 – Cisco ASA (Adaptive Security Appliance) failover is a mechanism that allows for seamless and automatic redundancy in a network’s security infrastructure. I was wondering will the failover work automatically if the active fails or failover will not work because the secondary is in a failed state Feb 25, 2017 · Before getting into the configuration details of Cisco ASA backup scheme (failover), I would like to point out a few rules regarding the technology itself. By deploying a pair of ASA devices in failover mode, organizations can mitigate the risk of a single point of failure and achieve uninterrupted network connectivity. On the live active failover unit, enter enable mode in the CLI and run the command “show run failover” and save the output to a text file. 0 (3), Mate 8. If the ASA is used to terminate VPN tunnels, this information includes any usernames, passwords and preshared keys used for establishing the tunnels. if the primary fails over to the secondary, should I still be able to use ASDM to mana This lesson shows how active/standby failover works on Cisco ASA Firewalls. Feb 13, 2024 · This post describes how to configure a Cisco ASA firewall for redundant/dual ISP connections, using the IP SLA and track features. x. Jun 28, 2014 · We have two cisco asa 5510's in a failover setup. not just for testing. Step 2 is not really necessary, but if you don't do step 2, it is useful to set all interfaces except the interface Apr 4, 2023 · Hi, I have a pair of Active/Standby ASA 5508's running 9. 本ドキュメントでは、ASAの冗長機能の説明、及び、Failoverのトリガーと、その判断を行うための Health Monitoringの実装について、実例を交え紹介します。 合わせ、安定した冗長構成の運用のための ベストプラクティスを紹介します。 Oct 20, 2023 · In this article, we take a look at the configuration steps to set up High Availability between two Cisco Secure Firewalls running ASA software using the command line interface (CLI) with a shared dedicated physical link for the Failover and Stateful Link features. These failover strategies ensure minimal disruption and continued network security operations even in the event of device or link failures. If you can tell me step by step like how does gratituos ARP injecteded to the standby device and all. Add ASAのActive/Standbyの冗長構成 (Failover pair)では、Active機が通信を処理し、Standby機は待機状態となります。 何らかの理由で、Active機とStandby機の両方の再起動が必要な場合、本ドキュメントの手順で実行することで、 通信影響を抑え 両機器の再起動が可能 です。 Nov 27, 2024 · This document describes the operation, verification, and troubleshooting procedures for High Availability (HA) (Active/Standby failover) on FTD. Aug 4, 2013 · Solved: hi everyone, On single ASA 5505 with Security plus license i did some failover config for testing purposes below is the output ASA1# sh failover Failover On Failover unit Primary Failover LAN Interface: test Vlan4 (Configuration incomplete) Feb 24, 2025 · This document describes how to upgrade ASA for failover deployments for Secure Firewall 1000, 2100 in Appliance mode, and Secure Firewall 3100/4200. The health of the active interfaces and units is monitored to determine if specific failover conditions are met. One group is assigned to be Active on the primary ASA, and the other group is assigned to be active on the Secondary ASA. The question to Configure the ASA for failover communication and as a secondary unit. The running config has no "failover active" or "no failover active" directives in place. " Understanding Failover The failover configuration requires two identical security appliances connected to each other through a dedicated failover link and, optionally, a Stateful Above output from secondary unit which now is primary. The primary firewall is "Active", the secondary firewall is "Standby Ready". Once the configuration is applied, the ASDM prompts for the IP address of the secondary ASA. The failover works fine. Sometimes the Secondary ASA gets the Active Role, that means this configuration is working pretty well. On a production environment, it is highly recommended to implement two Cisco ASA firewall (or VPN) in high Feb 10, 2021 · This article contains detailed step wise method to configure failover in Cisco ASA Firewalls using command line interface. Jun 3, 2025 · A failover group is simply a logical group of one or more security contexts. just stopped working recently. This host: Primary - Active Active time: 4077523 (sec) Sep 30, 2011 · Cisco ASA stands for Cisco Adaptive Security Appliance. 16. When I have to switch from main ASA to BKP ASA, I boot my BKP ASA and then unplug the cables manually from main ASA and plug them into BKP ASA. Make sure that the interfaces have the respective Standby IPs configured. First, enable the failover feature, enable the interface for LAN failover and stateful failover, and define the role and the active and standby IP address. ASA Fail-Over Modes As I mentioned before, ASA supports two failover modes, Active/Active failover and Active/Standby failover. Both failover modes support stateful or stateless failover. Dec 19, 2016 · Cisco ASA Firewall Active / Standby Failover This lesson shows how active/standby failover works on Cisco ASA Firewalls. MANULY CHANGE ROLE TO ACTIVE ON STANDBY UNIT # failover active T his command has to be typed on STANDBY unit! Check failover status FAILOVER MONITORING Jan 24, 2018 · Hello, My secondary ASA shows failed in the output of show failover because of a down interface. May 22, 2023 · Cisco ASA stands for Cisco Adaptive Security Appliance. Dec 14, 2011 · The Tag of primary and secondary, and that te secondary becomes the active ASA. Failover System Requirements Hello guys. Mar 16, 2022 · By default ASA is in secondary mode. On Friday I noticed I lost the ability to telnet and ssh to my Cisco box which is a 5545, ASA version 9. There will be an interruption for network traffic. Mar 18, 2014 · You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. The problem came when the ac You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. This article explains how to setup and configure high availability (failover) between two Cisco ASA devices. Below is the show failover result from secondary leg (acting as active box) Failover On Failover unit Secondary Failover LAN Interface: failoverlan GigabitEthernet0/2 (up) Reconnect timeout 0 Jan 22, 2025 · How To Failover Cisco ASA Firewall Failover configuration in Cisco ASA (Adaptive Security Appliance) firewalls is crucial for maintaining high availability and minimizing downtime in network security. Nov 12, 2025 · You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. Fully configure your primary ASA, with failover and standby IP's as well, on the secondary ASA enable/unshut the links and configure the faille interface, the config will get sync'ed from the primary ASA, you'll be able to access both afterwards. NPGFW1# show run The Ultimate Guide to Cisco ASA Failover Command Line Interface When it comes to network security, Cisco ASA (Adaptive Security Appliance) is one of the most trusted solutions in the industry. How to get the primary back to active and vice versa? Nov 8, 2022 · If so you could unplug the primary ASA, failover would automatically occur to the secondary ASA. Nov 12, 2025 · The backup ASA Virtual connects to the active ASA Virtual using connect port. None of them have "failover active" or "no failover active" in their configuration. The failover cable is directly connected to each FW. But I would like to know why failover is happening, it is happening such as 2 times per day. In this article, we will explore failover concepts, the types of failover, configuration steps, verification methods, and best practices for ensuring a successful failover setup. But the problem is that I become unable to access the internet for a very long time. This chapter includes the following sections: • Understanding Failover • Configuring Failover • Controlling and Monitoring Failover For failover configuration examples, see Appendix B, "Sample Configurations. Regards!! Dec 2, 2021 · Hello, My primary asa has become standby and the secondary has become active. This is where configurations for failover become crucial. This is done from the system context so yes you need to switch it into the multiple context routed mode. ASA Active/Standby failover/redundancy means connecting two identical ASA firewall units via LAN cable so that when one device or interface… Asa failover swap primary/secondary? so i have two asa and for some reason after a failover it switched the primary to secondary and vise versa. When Primary unit is up after failute secondary still will be active unit his failure or until we change the role by hand (see output below). I then went on the Standby ACtive ASA and configured it to be the Primary ASA by typing failover lan unit primary. Setting up failover on your Cisco ASA devices is crucial to ensure high availability and minimal downtime. The Primary chassis is configured while the Secondary chassis has been wiped. Cisco ASA acts as both a firewall and a VPN device. Then to create an EEM applet to trigger the command “clear crypto ipsec sa peer <the secondary peer IP address>” to clear the tunnel with the secondary peer and re-initiate it with the primary, every time (The system will failover to the secondary in few seconds and run normally) Put the primary ASA 5525 on the rack, do not plugged the cables yet, just power on the ASA. Nov 12, 2025 · A failover group is simply a logical group of one or more security contexts. Would it be proper to failover in a manner such Let’s cover the manual approach. . (Unless you manually change the configuration to force things otherwise!). Salim's advice, I set logging console 7 on the Primary while trying to pair the devices. Is there any recommended best practice for such ne For instance, assume you have two security contexts: CONTEXT1 and CONTEXT2: On ASA-1: CONTEXT1: Primary/Active CONTEXT2: Secondary/Failover On ASA-2: CONTEXT1: Secondary/Failover CONTEXT2: Primary/Active This way, both ASAs in the failover pair are processing traffic - just for different security contexts. 1(1) and ASDM version 7. for ASA-B to be active (primary) here is the config ASA-B failover lan unit primary interface gigabitEthernet 0/3 no shutdown ! failover lan interface LANFAIL gigabitethernet 0/3 failover interfaces ip LANFAIL x. The current active firewall is the secondary. If you configure a pair of ASA for failover and use only a single address for the interface of the primary/active ASA then perhaps it works if there is a catastrophic failure of the primary/active ASA and the backup migt take over. Est. Pri# sh failover state State Last Failure Reason Date/Time This host - Primary Active None Other host - Secondary Failed Comm Failure 19:17:09 UTC May 26 2017 ====Configuration State=== Dec 24, 2014 · Hello friends, I got a pair of ASA 5545 working as Active/Standby. What do I need to configure in order for a successful implementation of the state? Do I only configure state link and I The Cisco ASA failover configuration requires two identical security appliances connected to each other through a dedicated failover link and, optionally, a stateful failover link. 3 (in case you want to but you don’t have to), study well! Access Lists and . Is there a command to troubleshoot t When is says that is has ended replication On the secondary firewall, issue a “show failover” (Note: the hostname will have changed to the one on the primary firewall). ASA VPN module was enhanced with this logical interface in version 9. Jul 4, 2018 · Does anyone know where I could find the instructions for replacing a failed unit in a ASA High Availability pair? May 28, 2020 · Hi All, I have failover configured between two ASA 5515. Oct 8, 2014 · How to Configure Hot Failover – Cisco ASA 5510, 5500 Series Firewalls – Active/Standby: Two ASAs have identical hardware specs From “Show version” compare the licenses installed. Transmitting this sensitive data in clear text could pose a significant security risk. Typically the listen port and the connect port are the same, unless your configuration requires some type of network address translation between the ASA Virtual units. If you are running ASA IOS 8. Kindly assist us on Apr 27, 2022 · The reachability of each interface can be done from either leg, still my asa failover is in failed state. Regards, KALEEM Nov 5, 2014 · I have 2 ASA 5510 with image 8. Step1 – You need to make sure failover interfaces selected should in shutdown state. Do I A) Lo Apr 20, 2018 · I disconnected the failover cable and reloaded the Secondary Active ASA which brought my config back online. Anyways, failover seems to be working ok. My question is. years since I played with one. In this post I will describe Active/Standby redundancy which is used much more frequently compared with the active/active scenario. When I see logs via ASDM (since its May 5, 2025 · I am trying to connect a pair of Cisco 4120 Firepowers, each running a single ASA in multiple context mode. What would cause this behaviour? For example, depending on interface failure patterns, it is possible for failover group 1 to fail over to the secondary ASA, and subsequently failover group 2 to fail over to the primary ASA. Feb 8, 2023 · Hi Community, We have a FPR-2130 with ASA appliance in 2 Firewall cluster. Looking through logs around the time of the failover I'm unable to see anything that would trigger this event. At which point change the configuration to primary (of the new active/primary ASA). IP SLA will be configured in conjunction with the track feature to monitor the connection/reachability to the Primary ISP connection. The link between them is but a mere cross-over cable. What can be done to allow traffic to go from R1 to R2 via ASA2 when ASA1 inside or outside interface is down? Currently this happens only when ASA1 is down (shutdown). it fails over and picks up without missing a beat. How could I dete I've seen something similair before where the secondary failed and wouldn't be able to join back without a disable and enable of failover on the primary (please read the last paragraph before doing this) When I ran a debug command for failover on (I think) the secondary unit. Here is the documentation which is already available on Cisco. Licenses must match on both ASAs. If I copy a file to the primary ASA's flash, is there any command I can run on the primary ASA to copy a file to the secondary ASA? Regards Nov 17, 2014 · Hi, I have configured a pair of Cisco ASA in Active/ Standby mode (see attached). Mar 15, 2018 · Cisco says if you change a Primary ASA with a new hardware and a Primary ASA boot up the mac address on Secondary ASA will be replaced from Primary. May 3, 2013 · Introduction The purpose of this article is to explain the impact of interface monitoring on ASA failover pair. Do you have to configure secondary unit interfaces manually or you do all the configs on the primary unit? Another Question: Does the replication and synchronization copy all configs from the primary to the secondary unit? Aug 13, 2024 · This document describes how to configure crypto map-based failover with backup ISP links with the IP SLA track feature on FMC-managed FTD. 2 – The active-standby failover Aug 21, 2014 · You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. y failover link LANFAIL exit once ASA-B is configured as Primary (Active) as soon as you configured the ASA-A as Nov 12, 2025 · The backup ASA Virtual connects to the active ASA Virtual using connect port. The second ASA which is in secondary mode is newer, so i want to change it to be the primary unit of the failover scheme. We recommend Dec 6, 2019 · Our current situation is that we have an operational VPN tunnel between a Palo Alto PA 3020 at our primary site and a Cisco ASA 5505 at our satellite site. A failover mechanism helps ensure that if one firewall goes Cisco Adaptive Security Appliance (ASA) Software - Some links below may open a new browser window to display the document you selected. Feb 7, 2024 · This document describes how to configure Active/Active Failover in Cisco Firepower 4145 NGFW Appliance. Feb 5, 2022 · Dear All, I m new to ASA 5525, I just run Show Failover command, it shows secondary in use how dow i troubleshoot the issue to bring back the Primary one. Need a clarification with ASA failover configuration. In Active/Standby failover, one device functions as the Active unit and passes the traffic. Oct 24, 2022 · In this blog post, we will learn how to configure Active/Passive Failover on the Cisco ASA firewalls. Oct 16, 2024 · How to Add New ASA to failed Active/Standby HA Pair On the live active failover unit, make a backup of the running config by either transferring it via TFTP or copying it to a USB drive inserted into the unit. Feb 1, 2014 · Solved: Hi Everyone, If ASA is in active / standby failover. I upgraded the Firewalls using the following method: 1) set boot image 2) reload standby 3) make standby as active (now on latest code) 4) reload standby (former active) 5) no failover active on 'active' unit (secondary) I upgraded many firew We will be building a Active standby failover configuration with redundant Cisco ASA firewalls in this article. Before upgrading to 8. When a failover occurs, it occurs at the failover group level. Sep 14, 2017 · 1. 3(1). Apr 6, 2020 · You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. Failover Link between Primary and Secondary Unit uses external switches for connecting the two ASA´s We like to chanke the failover link to a directly connected link between the two devices. 任意LAN端末から ASA (Secondary/Active機)を経由した通信が可能であることを確認します。 show failover コマンドで、自身がActiveで、Primary機がfailedであると状態を確認できます。 The Primary and Secondary firewalls are physical firewalls, the primary will always be the primary, and the secondary will always be the secondary. I know it doesn't really matter but how would i go swapping those. site1asa (config)# failover lan unit secondary Nov 26, 2018 · I have a pair of ASA-5545-X in an active-standby failover configuration, i found a failover problem with the secondary ASA, one of the interface was showing faiiled (waiting). You failover to the Secondary and that unit becomes ACTIVE on the failover pair. 7(1) and is used to create a VPN tunnel to a peer, su May 27, 2017 · I am not able to join firewall pair in failover. 0 standby x. May 2, 2018 · Introduction This document describes how to configure a site-to-site (LAN-to-LAN) IPSec IKE Version 1 (IKEv1) tunnels using Virtual Tunnel Interface (VTI) between two Cisco ASA. We have implemented ISP redundancy and redundancy for this tunnel on the PA 3020. Nov 21, 2012 · I have two ASA in a lan state primary\\secondary configuration. This article explains how to setup and configure high availability (failover) between Apr 27, 2014 · Hello, I have an ASA firewall pair configured as active/standby but the previous administrator did not configure the failover state. From show failover state, I see that the reason was "comm failure" on the primary. Failover System Requirements Nov 28, 2015 · Hi I am hoping someone can help me with this issue I am having. For example, depending on interface failure patterns, it is possible for failover group 1 to fail over to the secondary ASA, and subsequently failover group 2 to fail over to the primary ASA. Oct 14, 2020 · Hi all, Occasionally (twice a month or so) our ASA 5585's will fail over to the standby unit. Dec 26, 2016 · 筐体間で同期が不完全な場合の対処について ASA冗長構成では、Primary機とSecondary機で冗長構成を組み、Active機とStandby機間で設定やセッションの逐次同期を行っています。 事例としては稀ですが Active機とStandby機間で設定の同期にズレや差分が発生することがあります。また、関連した問題として Jul 29, 2025 · All information sent over the failover and Stateful Failover links is sent in clear text unless you secure the communication with a failover key. And for some reason if you need to reboot standby ASA is it good practice just to reboot standby? If standby is rebooted should it syn all the config over failover link from active ASA? Mar 13, 2019 · You can assign failover group to be active on the primary ASA, and failover group 2 to be active on the secondary ASA. 1 (up) Unit Poll frequency 800 milliseconds, holdtime 3 seconds Interface Poll frequency 5 seconds, holdtime 25 seconds Interface Policy 1 Monitored Interfaces 4 of 250 maximum failover replication http Version: Ours 8. Let me add that both ASAs have premium license (active/active) and the scheme is in active/failover. ) Configure the Failover configs on the Active ASA. I read it could be a bug and I tried to remove the telnet and SSH commands and reissue them, but it Apr 3, 2020 · Look here for one example, it's for Active/Active, but the interface and failover config is the same. I haven't been able to understand why this is happening so I'm reaching out for help. I get Any Body can exlain little about ASA Failover incident what happens when failover occures. The state of the failover connection detects the failure of the active ASA Virtual. 255. This is just a failsafe. Kevin Santillan schrieb: To add the Standby ASA, here's a high level overview of what needs to be done. 2. If you put it back into the network after reloading or power cycling it will try to find and Feb 8, 2016 · Looking for advice and guidance on setting up a redundant site-to-site VPN to our remote overseas office. On my previous post I talked about Cisco ASA Active/Active configuration. Sep 4, 2019 · I have Cisco ASA 5516-x in Active / Standby failover. Understanding the types of failover and how they are implemented is essential for designing resilient ASA deployments. If those conditions are met, failover occurs. I need to know how to add to the existing ASA5505 config so Aug 7, 2024 · This document describes fixing split-brain problems in Cisco Adaptive Security Appliance failover or Firepower Threat Defence High Availability Pairs. Dec 18, 2011 · ASA failover works fine without the standby address. What would be the best way of doing this? What config do Feb 13, 2014 · I guess you could add the parameter "priority" to the above command to show also is the unit configured as the "primary" or "secondary" and then the command would probably be in this order Introduction to ASA Failover Cisco ASA devices offer high availability and redundancy through failover mechanisms. Currently FW-02 is in the primary active state and FW-01 is in the secondary standby state. x 255. This allows the standby ASA to take over when the primary fails. com: Oct 5, 2020 · We have two cisco asa 5585-X's in a failover setup. x) running independently with separate ISP connections (DSL-type using PPPoE). ) Clear the configurations in the Standby ASA. I am a bit rusty with ASA. Today I’m going to discuss how you can configure two ASA’s to failover to their secondary WAN, and then have their tunnels fail over as well. it worked before. I want to manually fail over from the primary to the secondary. One should always aim for having two ISPs if the business needs to rely on the tunnel. 3 and above, licenses don’t need to match. At the main site, we have a pair of ASA-5510's (9. I then rebooted the primary firewall and all traffic continued to work through the secondary unit. 0 (3) Jun 16, 2017 · Policy based IPSEC tunneling is probably the most widely used technique to get two offices to communicate securely (at least in the SMB Market). In this guide, we will walk you through the failover command line interface (CLI) commands for Mar 11, 2010 · I have 2 ASA 5520's set up in an Active/Standby scenario. Jan 21, 2025 · Introduction The Cisco Adaptive Security Appliance (ASA) firewall is a robust solution that provides essential security and protects network resources. 2. reading time: 4 minutes 1 Like Cisco ASA 5525 Cluster Active/Passive Firewall to BGP CE Router Design options aaronbinnersley (aaron b) August 27, 2015, 4 Nov 28, 2021 · Now that we have the active Cisco ASA configured we want to configure the same statefull and failover settings on the standby node. x) running in a active/standby failover configuration, but at the remote site we have a pair of ASA-5510's (9. i want the one asa to be the active primary and the other secondary. … As a fix, Cisco recommends configuring a SLA monitor to keep track of the primary peer IP address and creating a conditional route of the primary peer IP address tied to the SLA monitor. Cisco ASA acts as both firewall and VPN device. Failover for High Availability This chapter describes how to configure Active/Standby or Active/Active failover to accomplish high availability of the ASA. Following Sheraz. Nov 20, 2012 · I have a Primary\\Secondary LAN state firewall pair. 21. With the growing reliance on uninterrupted networking services, the need for high availability in firewall systems has surged. The only problem I have is that the failover unit keeps changing the name everytime I reboot the secondary unit but I also think every time it Oct 30, 2012 · Hi guys I made an ASDM upgrade for one of my two CISCO ASA 5520. oxgtl chqvha zxkcsc ftp heafn wkeah kastbf xmo sgsiu obagyht qlox hkgafqc znjmosv hwjj ezjd