OPNsense Forum

English Forums => General Discussion => Topic started by: quentin.dorcival on June 02, 2026, 09:01:14 AM

Title: VIP and OSPF
Post by: quentin.dorcival on June 02, 2026, 09:01:14 AM
Hello,


We (the IT team) are facing something that we can't tell is a bug or a normal state.

We have a cluster of DEC4280 and DEC4240 on the same site and also 1 Cisco Catalyst 9500 and 1 MikroTik
All of them are doing OSPF and it works fine.
Our cluster version :
OPNsense 26.4_14-amd64
FreeBSD 14.3-RELEASE-p12
OpenSSL 3.0.20
Licensed until 2028-05-02

OS-FRR version :
os-frr (installed)   1.51


Our goal is to migrate historical networks from the Cisco to OPNSense (one for computers, printers,... and the second one for servers...) with the following process :
We create interfaces in A node and B node with state shutdown.
We create the VIP (which is not active due to shutdown interface)

BUT with OSPF running in the OPN, it starts to announce the new VIP which cause a mess because the interfaces are down.
If we delete the VIP the ping doesn't work anymore but the interruption persists.
We have to put A node in carp maintenance mode to get back to a normal state.

If OSPF is not running, the VIP stays in standby and our process is fine but we have to enable OSPF.

I didn't find any information on documentation or forum, I hope someone can explain.

Thanks you.
Quentin