Uwe Klein <[email protected]> wrote: > Rick Jones wrote: > > Uwe Klein <[email protected]> wrote: > > > >>then: > >>some pakets are sent as broadcast to all ports. > >>switches store for each port the MAC addresses seen. > >>I have no idea if modern switches do (r)arp queries to > >>find the port a target MAC is sitting on or just broadcast > >>unknown MACs. > > > > > > Do you mean "flood?" Broadcast implies ff:ff:ff:ff:ff:ff > > destination MAC.
> Most certainly not. > A switch (usually) forwards packets from one port to _one_ other > port ( the one were the switch has seen the target MAC ) > ( exempt are broadcast and multicast packets. ) > Now if there is no entry for the target MAC the thing to do is > either forward this packet to all ports or start a reverse arp > cycle. I don't think I've ever heard of a switch doing reverse ARP - and that would belimited to IP traffic where Ethernet carries more than just IP. Apart from that, while I think we may differ in terminology (I was tweaking on "just broadcast unknown MACs) I suspect we are in agreement on semantics. rick jones -- the road to hell is paved with business decisions... these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
