David Miller wrote:
This is actually a real issue for virtualization, and many
if not all current generation ethernet chips support
programming several unicast ethernet addresses in the MAC.
Networking switches in domain0 on virtualization hosts use
this feature to support seperate MACs per guest node,
and if the chip doesn't support this the chip is put into
promiscuous mode.
We don't have any clean interfaces by which to do this MAC
programming, and we do need something for it soon.
Yep, that's been on my long term wish list for a while, as well.
Overall I would like to see a more flexible way of allowing the net
stack to learn each NIC's RX filter capabilities, and exploiting them.
Plenty of NICs, even 100Mbps ones, support RX filter management that
allows scanning for $hw_limit unicast addresses, before having to put
the hardware into promisc mode.
Jeff
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