brctl and virtual interfaces [closed]

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Is possible adding a virtual interface to a virtual bridge by brctl? Does It make sense? I have a virtual interface but trying to add it to the bridge i get an error: invalid argument.

Thank you all!

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The simple answer seems to be that any "ethernet like" interface can be added to a bridge. So basically is has to use ethernet addressing with MAC address resolution using ARP.

Specifically the net_device structure must have a type of ARPHRD_ETHER and an addr_len of ETH_ALEN. It also can't have IFF_LOOPBACK or IFF_DONT_BRIDGE set.

You can see the code which handles this in br_add_if() in net/bridge/br_if.c in the kernel source.