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My bridge does not show up in traceroute!
It's not supposed to. The operation of a bridge is (supposed to be) fully transparent to the network, the networks that a bridge connects together are actually to be viewed as one big network. That's why the bridge does not show up in traceroute; the packets do not feel like they are crossing a subnet boundary.
For more information on this, read a book about TCP/IP networking.
It doesn't work!
It says: “br_add_bridge: bad address” when I try to add a bridge!
Either your kernel is old (2.2 or earlier), or you forgot to configure Ethernet bridging into your kernel.
No traffic gets trough (except ARP and STP)
Your kernel might have ethernet filtering (ebtables, bridge-nf, arptables) enabled, and traffic gets filtered. The easiest way to disable this is to go to /proc/sys/net/bridge. Check if the bridge-nf-* entries in there are set to 1; in that case, set them to zero and try again.
# cd /proc/sys/net/bridge # ls bridge-nf-call-arptables bridge-nf-call-iptables bridge-nf-call-ip6tables bridge-nf-filter-vlan-tagged # for f in bridge-nf-*; do echo 0 > $f; done
