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Re: FTTH CPE landscape
From: Owen DeLong <owen () delong com>
Date: Fri, 5 Aug 2011 01:23:55 -0700


On Aug 4, 2011, at 5:38 PM, <Valdis.Kletnieks () vt edu> wrote:

On Thu, 04 Aug 2011 13:30:35 PDT, Owen DeLong said:
On Aug 4, 2011, at 8:35 AM, Jay Ashworth wrote:
- Generic consumer grade NAT/Firewall

Hobby horse: please make sure it support bridge mode?  Those of us who
want to put our own routers on the wire will hate you otherwise.


Why? As long as it can be a transparent router, why would it need to be
a bridge?

I must be having a senior moment, but what in the world is a "transparent
router" and how is it different from running in bridged mode?  (Note that if if
it's transmogrifying the packets in some way, it's not really transparent, and
if it's not, it's basically bridging...)


A transparent router (sorry, poor choice of terminology on my part) is a router
which doesn't NAT or become selectively opaque (firewall). In other words,
it forwards packets and it doesn't do any other arbitrary things to them at the
whim of the ISP, but, rather passes along what the customer gives it to the
ISP and vice versa without interference.

It differs from a bridge in that it terminates the collision and broadcast domains
on either side of it.

Owen

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