On Thursday 29 January 2009 16:47:55 David Stevens wrote: > Also, if you can't keep all the MAC multicast addresses (ie, > the limit is memory and not look-up speed), then getting > out of multicast-promiscuous mode correctly isn't easy > since you don't know what groups you "forgot". You could > rebuild from the protocol memberships, if you know when > you've left enough groups to fit, but otherwise the MAC > multicast addresses you didn't keep of course won't work if you > leave multicast-promiscuous mode and the filter doesn't > have them.
The command is simply "set the filter", not "add" and "delete", so the host doesn't have this problem. VLAN has more of an issue: that has add and del. So the host can do a counting hash, or say remember 16 and then a count of overflows, but both will be suboptimal over time. Cheers, Rusty. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
