[Bug 200319] Bridge+CARP crashes/freezes

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200319

Palle Girgensohn <girgen at FreeBSD.org> changed:

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                 CC|                            |girgen at FreeBSD.org

--- Comment #23 from Palle Girgensohn <girgen at FreeBSD.org> ---
This happens on 12.1-release as well, with netgraph instead of epair.

A setup with two physical jailhosts, each with multiple vnet jails all using
netgraph, and at least one jail on each machine using the same CARP IP address.
After downing the active CARP netgraph interface to let the BACKUP jail take
over, *both* machines stop accepting any network traffic on the interfaced
connected to the netgraph bridge. The only solution I could find was to reboot
both machines.

This is really problematic for us, since our idea is to use jails and vnet with
CARP to supply resilient services.

How can I help fint this problem and hopefully fix it?

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