Re: IPV4 is nearly depleted, are you ready for IPV6?

["David G. Mackay" <mackay_d@xxxxxxxxxxxxx>]

On Wed, 2010-12-08 at 10:41 -0500, Adam Tauno Williams wrote:
> On Wed, 2010-12-08 at 09:37 -0600, David G. Mackay wrote:
> > On Wed, 2010-12-08 at 10:01 +0100, David Sommerseth wrote:
> > > Nope, ARP is gone.  But it gets a replacement as a part of IPv6, instead
> > > of ARP being an addition to IPv4.
> > > <http://itkia.com/how-to-arp-a-in-ipv6/>
> > > <http://www.tcpipguide.com/free/t_TCPIPIPv6NeighborDiscoveryProtocolND.htm>
> > I have a question about how IPV6 interacts with the switches in the
> > local network.  Right now, my sub $50(US) gigabit switch from any of
> > several vendors keeps an arp table to determine which switch port a
> > message will use.  With the huge address space available with IPV6, how
> > is that going to work, and when am I going to get a cheap soho switch
> > that can handle IPV6?
> 
> The switch will continue to operate using the MAC# of the client
> interfaces.  The switch doesn't care about IPv4, IPv6, or IPX for that
> matter [unless you enabled vLANs or managment features - which is a
> different issue].

Maybe that's the case for my little cheapo soho switch.

> The switch does not maintain an "arp table".  It maintains a list of
> MAC#s it has seen on each port.

Sorry, but that's certainly incorrect for the higher end switches.  I've
accessed the arp table on several different brands of switches.  Also,
look up ARP poisoning.

Dave


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