[tlug] Re: Class B Hubs not suitable for data center use?

[Tobias Diedrich <td@example.com>]

Jonathan Byrne wrote:

> >I am sure Jonathan knows this, but the above is not _completely_ true.
> >A switch does forward packets that are destined to unknown hosts (i.e.
> >not in its MAC cache [not ARP cache]) to all (but the originating) ports.
> 
> This is a good point, thanks for bringing it up.
> 
> It's a very small window, though, because when a new host is connected
> to the switch, its MAC address gets cached quickly.  The LAN addresses are

And at least lowcost switches fall back to hub behaviour if you
overflow their MAC-Caches with an ARP-Flood...

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