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Re: [RE] Stream identification at the MAC SAP



Matt,

What you missed is the 100Mb switch with 100Mb backplane - that's
completely new. I don't quite understand why this dude has all these
HDTVs but won't stump up $20/port for a wirespeed gigabit switch - but I
guess we need to make a standard that works for people who want
"retro-networking(c)"

Bear in mind that any house that's wired with CAT-5 will be star-wired.
A 24 port switch (maybe 48 for a mansion) will give wirespeed gigabit to
every socket in the house (in 3 yrs time, wirespeed gig will be v.
cheap). Most data and audio will run over the wireless. If more ports
(than sockets) are needed in a given room, then a satellite switch (100M
ports, Gig uplink) will suffice. As long as the satellite switch is 10
edge ports per uplink then we still have wirespeed, non-blocking data
paths from every client to every other client.

Of course, this demonstrates perfectly why we need a new MAC for this.

Hugh.

Matt Squire wrote:

>This doesn't seem like anything new.  Substitute in different applications and different bandwidth possibilities, and this is the same QoS vs overprovisioning argument that has been going on for decades.
>
>I'm just not sure why we're talking about this in 802.3.  There are technologies that most often take an overprovisioning philosophy (Ethernet, IP, ...).  There are technologies that take a stricter QoS philosophy (FR, ATM, ...).  There are even ways to take the traditional packet technologies (Ethernet, IP, ...) and build a strongly QoS-enabled network out of them (MPLS).
>
>If applications/networks need things like bandwidth reservation, dedicated network resources/paths, backup paths, etc., there are methods to do so.  If applications/networks can get by with scheduluing/queueing, traffic management at the edge, etc., then there are ways to solve that problem too.
>
>I'm missing the part where the underlying QoS problems are new or different than those that have been around for decades.
>
>- Matt
>
>
>
>
>>
>>
>>Let me illustrate with 3 example use cases that we need to deal with.
>>
>>For purposes of these examples I will use an switch with
>>100Mbs ports and a
>>100Mbs internal backplane.  This may seem limiting but is
>>equivalent to
>>having two switches connected by a 100Mbs link.  It also allows me to
>>illustrate the problems with only a few HD streams.
>>
>>
>>
>>