Rick Jones wrote: > Uwe Klein <uwe_klein_habertw...@t-online.de> 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. uwe > > >>Hail for the times hubs were dumb repeaters with neither memory nor >>intelligence ;-) > > > Indeed :) Of course, then we'd be complaining about variability in > back-off times and capture effect and whatnot instead :) Someone sent me a copy of the unix haters handbook today. Nothing better than having a target for good ol bitching. uwe _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions