I discovered a curious problem while trying to set up some firewalls. I
do not receive multicast packets through 802.1q (vlan tagging) unless
I'm doing a tcpdump on the interface. My first thought was that this was
promiscuous mode-related, but I tried calling ifpromisc() from if_up()
on sys/net/if.c and that didn't help. I tried to find out what else was
different when this was done through bpf, but aside a bpf flag I
couldn't find anything.
Anyone has any clues or insights?
--
Daniel C. Sobral (8-DCS)
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wow regex humor... I'm a geek
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