topic Failover is not occurring on the passive device properly. in General Topics

Failover is not occurring on the passive device properly.

ChandrashekharD — Mon, 24 Nov 2025 18:13:42 GMT

Hi Team,

1) After performing a failover test, we noticed that the internet was not working on the passive device, although the ping to 8.8.8.8 continued successfully.
2) The issue started after upgrading the firewall. Considering that the passive firewall may not have rebooted properly after the upgrade, we performed a hard reboot, but the issue persisted, the passive device still could not access the internet through the expected policy.
3) I reviewed the security policy which customer is using to access the internet and found that it works correctly on the active device, but the same policy does not work on the passive device after failover. On the passive device, we created a test security policy to access the internet and found that the internet was working fine without any issues.
4) We attempted to clear the old MAC address entries in the passive firewall through PuTTY and both firewalls are managed by Panorama. And device is also synchronized with the peer

Kindly help me to solve the issue

Model No:- PA 440

PANOS- 10.2.10-h9

Regards,

Chandrashekhar

Re: Failover is not occurring on the passive device properly.

MP18 — Mon, 24 Nov 2025 22:28:11 GMT

@ChandrashekharD Do you see the hits on the rule for traffic going to internet on port 443?

Can you ping the website hostname from passive fw cli?

Is MGMT IP of the passive device able to ping the internet websites via hostname?

Does the upstream device learn the mac of the passive device?

From the passive device when it is active do this

Trigger a Gratuitous ARP (GARP) from a Palo Alto Networks Device - Knowledge Base - Palo Alto Networks

Regards

Re: Failover is not occurring on the passive device properly.

reaper — Tue, 25 Nov 2025 16:57:04 GMT

are both devices added to the same device group on panorama and are you pushing the config to both devices at the same time?