I have a host recently updated to f20, with virtual machines using bridged networking. When I switch to NetworkManager controlled networking, the virtual machines' DHCP requests failed.

After much messing around, I have found that when NM is on, by the time the system has booted, bridge-nf-call-iptables, bridge-nf-call-ip6-tables and bridge-nf-call-arptables have all been set to 1, so something has overriden the setting from /usr/lib/sysctl.d/00-system.conf.

Is there some setting I am missing here?

Thanks

Paul

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