IP address classes vs CIDR (was Re: Reviving ARPAnet)
cctalk at gtaylor.tnetconsulting.net
Thu Jan 18 13:37:28 CST 2018
On 01/18/2018 12:23 PM, Dennis Boone via cctalk wrote:
> You all talk about Proxy ARP in the past tense for some reason. :)
Please don't interpret the fact that I am inadvertently talking about
Proxy ARP in the past tense to mean anything.
I personally started solving the problem that Proxy ARP is meant to
solve with a different solution.
I fell in love with Linux bridges (brctl, etc) for things like this (I'm
guessing) 15+ years ago. I can create a Bridging Router (a.k.a.
BROUTER) that combines layer 2 and layer 3 functionality. This allowed
me to bridge non-IP protocols, like NetBIOS / IPX, while routing IP.
I could further extend things to include selectively bridging IP via
adding EBTables to the mix.
I did a LOT of crazy things with Linux bridges. }:-)
In hind sight, Proxy ARP might have been the simpler solution. Though I
think Proxy ARP would have required that I configure IPs to be Proxy
ARPed on all intermediate hosts. Where as bridging has it's own
inherent L2 learning. (At least when I was working with non-IP protocols.)
I don't know how well Proxy ARP plays with things like OpenVPN or
OpenSSH layer 2 tunnels. - I know that I can easily extend layer 2
across a LARGE majority of networks using Linux bridges. - I think
that I can even bridge any type of network that uses 802.2 Link Level
Control headers. I.e. Token Ring (802.5) and Ethernet (802.3) and
Wireless (802.11) and various tunnels.
Grant. . . .
unix || die
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