topic Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free" in Firewall and Security Management

/var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

Mattias_Jansson — Wed, 18 Jun 2025 10:40:40 GMT

Logs appear on both members, 23900 VSX/VSLS cluster R81.10 take 174.

Anyone who knows what is causing this and how it can be solved?

Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

Tal_Paz-Fridman — Wed, 18 Jun 2025 16:21:50 GMT

Did you recently delete an interface? Was is a VTI interface?

Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

the_rock — Wed, 18 Jun 2025 17:51:41 GMT

When did you notice this? Any recent changes?

Andy

Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

Lesley — Wed, 18 Jun 2025 18:23:56 GMT

lo = loopback interface. Normally you will not change something there. Have you tried already the basics? Like turn off / on interface. Policy push to vs0. cpstop;cpstart etc

Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

the_rock — Wed, 18 Jun 2025 18:40:20 GMT

Great point Lesley, missed that.

Andy

Re: /var/log/messages flooded with "unregister_netdevice: waiting for lo to become free"

Mattias_Jansson — Thu, 19 Jun 2025 05:38:34 GMT

It seems that the messages started after the removal of a virtual server from the vsx-cluster.
No VTI interfaces are used on the cluster.
Policy push on vs0 and cpstop/cpstart on vs0 didn't have any effect. The logs are still repeated.