Tue Mar 22 19:35:32 EDT 2011

Weird bridge tcpdump problem

Packets come through when I have "tcpdump -i br1" running.  As soon as
I quit that, the packets don't come through.

Has something to do with it entering promiscuous mode?

From here [1]: "In order to act a a bridge, the network device must be
placed into promiscuous mode which means it receives all traffic on a

Looks like tcpdump disabled promiscuous mode on a bridge! To fix:

    ifconfig br1 promisc

Can't reproduce with tcpdump after doing the above.

[1] http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge