# Configure HA a/p on Thunder1040 **URL:** \ **Category:** ADC - Application Delivery\ **Created:** [February 14, 2024, 8:37pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826 "2024-02-14T20:37:08Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jsanabria](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@jsanabria](https://community.a10networks.com/u/jsanabria)\ **Post date:** [February 14, 2024, 8:37pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/1 "2024-02-14T20:37:08Z")
Good afternoon, I’m new in the forum. I have 2 Thunder1040-F devices with firmware 5.2.1-p3, build 70, we want to configure HA in active/passive mode, what would be the procedure to do it. and that the synchronization is done automatically from the primary to the secondary Thank you ---
**Author:** ![mdunn](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@mdunn](https://community.a10networks.com/u/mdunn)\ **Post date:** [February 16, 2024, 5:24pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/2 "2024-02-16T17:24:20Z")
1. Welcome! There are two pieces to configure which work hand in hand to accomplish your goals: VRRP - this provides HA data plane redundancy 2. VCS - this provides automatic config sync between the devices I have attached the guides for both of these, but they’re also available on the A10 Support Portal. VRRP is configured first followed by VCS. I have also attached a couple example configs for how the final config will look. Be sure to check the configuration steps on the VCS guide. [VRRP-A\_High\_Availability.pdf](https://community.a10networks.com/uploads/short-url/kXnpw2oeF052Yw2jW4ywdkHAPV9.pdf) (1.42 MB) [ACOS\_Virtual\_Chassis\_Systems.pdf](https://community.a10networks.com/uploads/short-url/3anm2XRBxn7m2LV0S9MdtH4cPay.pdf) (1.22 MB) [adc-2.txt](https://community.a10networks.com/uploads/short-url/9y47urpHwzs7ILjshGmnXdWcsEY.txt) (1.72 KB) [adc-1.txt](https://community.a10networks.com/uploads/short-url/zzfi8okY38Qw4H6CQYfI9NjzZ8K.txt) (1.72 KB) ---
**Author:** ![jsanabria](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@jsanabria](https://community.a10networks.com/u/jsanabria)\ **Post date:** [February 19, 2024, 12:39am UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/3 "2024-02-19T00:39:28Z")
Good night. Thank you for your support, I have a concern, after having configured the interfaces, the static route, hostname, I must configure the vrrp as mentioned in the commands you sent me: vrrp-a common  device-id 1  set-id 1  enable ! device-context 1  vcs enable ! device-context 2  vcs enable ! vcs device 1  priority 140  interfaces management  enable ! vcs device 2  priority 100  interfaces management  enable vrrp-a vrid 0  device-context 1   blade-parameters    priority 150  device-context 2   blade-parameters    priority 140 ! vrrp-a interface ethernet 1/4 ! vrrp-a interface ethernet 2/4 ! vrrp-a preferred-session-sync-port ethernet 1/4 ! vrrp-a preferred-session-sync-port ethernet 2/4 but in the document something called floating IP appears, it is mandatory to configure that parameter? if so how should I configure it because I don’t understand that concept well Thanks ---
**Author:** ![mdunn](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@mdunn](https://community.a10networks.com/u/mdunn)\ **Post date:** [February 21, 2024, 5:36pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/4 "2024-02-21T17:36:22Z")
The floating IP’s are configured under the VRRP VRID. Here is an example: ```yaml vrrp-a vrid 0    floating-ip 10.1.1.100    floating-ip 10.2.1.116    floating-ip 10.3.1.84  device-context 1   blade-parameters     priority 150  device-context 2   blade-parameters     priority 140 ``` Floating IP’s are not required, but they can be useful for failover depending on your network routing configuration. The Active device in VRRP will advertise the floating IP’s, and they can be used as next hop in routes. ---
**Author:** ![jsanabria](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@jsanabria](https://community.a10networks.com/u/jsanabria)\ **Post date:** [March 6, 2024, 7:57pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/5 "2024-03-06T19:57:31Z")
Hello, Thank you for the support you have given me, for some reason the configurations are not synchronizing between the 2 devices, I created a new server on one device but it was not replicated, what parameters should you review for this. Thanks ---
**Author:** ![mdunn](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@mdunn](https://community.a10networks.com/u/mdunn)\ **Post date:** [March 8, 2024, 6:00pm UTC](https://community.a10networks.com/t/configure-ha-a-p-on-thunder1040/826/6 "2024-03-08T18:00:59Z")
Sounds like VCS may not be communicating or running properly. You can check the status of VCS from the CLI with “show vcs summary”. Here’s an example of a functional VCS output. Did you perform a “vcs reload” after configuring vcs? dunn-adc-2-Standby-vMaster[2/2]#sho vcs summary ```yaml VCS Chassis:    VCS Enabled:                               Yes    Chassis ID:                                2    Unicast Election port:                     41217    Multicast IP:                              224.0.0.210    Multicast Port:                            41217    Version:                                   5.2.1-P7.b160 ``` Current Discover mode:                     Multicast ```yaml Members(* means local device):  ID  State       Priority IP:Port                                       Location -------------------------------------------------------------------------------  1   vBlade      140      10.22.10.56:41216                             Remote  2   vMaster(*)  100      10.22.10.55:41216                             Local Total: 2 ``` dunn-adc-2-Standby-vMaster[2/2]#