[rbridge] ARP proxying
touch at ISI.EDU
Fri Dec 16 16:52:41 PST 2005
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Gray, Eric wrote:
> We can call it ARP caching (which would make some sense
> - possibly more than ARP replay),
ARP caching is what hosts and proxy ARP-ing routers already do (ala
See TCP/IP Illustrated, Vol 1, section 4.3.
> ARP replay or ARP Proxy. I
> am not sure where Joe's definition of "proxy" comes from, but
> - if we assume that definition, then ARP proxy is not what we
> have talked about at all.
FWIW, proxy ARP is in RFC1009, as referred to by RFC1122.
See TCP/IP Illustrated, Vol 1, section 4.6, which describes it in detail
as I have, and equates it to "promiscuous ARP" and the "ARP hack".
> However, ARP proxy/caching/replay/<whatever> is really
> an optimization - similar to the multicast optimizations of
> Sue's draft. I am reasonably sure that it does not need to
> be part of the base-line RBridge specification in order to be
> of use (again, much like the multicast optimization).
> Is this in the WG charter? Should it be?
Optimizations don't need to be in the charter, IMO.
> --> -----Original Message-----
> --> From: rbridge-bounces at postel.org
> --> [mailto:rbridge-bounces at postel.org] On Behalf Of Radia Perlman
> --> Sent: Friday, December 16, 2005 4:37 PM
> --> To: Developing a hybrid router/bridge.
> --> Subject: Re: [rbridge] ARP proxying
> --> Yes Joe, you are right. This was a confusion over the word.
> --> I have used
> --> "ARP proxy" to mean someone replies to the request, whether
> --> it be with
> --> the target's actual MAC address, or with one's own MAC
> --> address. So with
> --> your definition ("proxy" means you reply with your own MAC
> --> address),
> --> then you
> --> are right...we do not want RBridges to do ARP proxy. But we
> --> do want them to do ARP replay.
> --> I suspect I'm not the only one who uses "ARP proxy" in the
> --> more general way,
> --> so we have to be careful not to confuse people when we say
> --> RBridges will
> --> not do it.
> --> But whatever we call things, I'm glad we aren't disagreeing
> --> about how
> --> the thing
> --> works functionally.
> --> Radia
> --> Joe Touch wrote:
> --> >_______________________________________________
> --> >rbridge mailing list
> --> >rbridge at postel.org
> --> >http://www.postel.org/mailman/listinfo/rbridge
> --> >
> --> >
> --> _______________________________________________
> --> rbridge mailing list
> --> rbridge at postel.org
> --> http://www.postel.org/mailman/listinfo/rbridge
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