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- Newsgroups: comp.dcom.cell-relay
- Path: sparky!uunet!stanford.edu!kronos.arc.nasa.gov!iscnvx!news
- From: myoung@force.ssd.lmsc.lockheed.com
- Subject: 100 Base T
- Message-ID: <1992Nov18.140541.25934@iscnvx.lmsc.lockheed.com>
- Sender: news@iscnvx.lmsc.lockheed.com (News)
- Reply-To: myoung@force.ssd.lmsc.lockheed.com
- Organization: LMSC, Sunnyvale, California
- Date: Wed, 18 Nov 92 14:05:41 GMT
- Lines: 48
-
- The 100 Base-T Challenge:
-
- A couple of America companies have challenged the cell relay industry
- with a 100 Mbps ethernet LAN technology. Here is my opinion on how to
- beat back the challenge:
-
- 1) Strong switched ethernet product
-
- The 10 Base-T customers need a lower speed (320 Mbps) cell relay
- hub outfitted with 10 Base-T line cards for the switched ethernet
- market. Give this group an dual upgrade path, allowing them to defer
- their high bandwidth decision, and then choose between a full cell
- relay, FDDI, or 100 Base-T at a later date.
-
- 2) 10,20,40,80,100 Mbps line standards
-
- Settle on an asynchronous framing format for shielded and unshielded
- twisted pair at all of the above speeds. If possible utilize the
- existing data transmission schemes, and the existing industry for
- physical connectivity.
-
- Also settle on an asynchronous T1,T2 and T3 framing standard.
-
- 3) Continued Simplification of Adaptation Layer
-
- The adaptation layer is a market negative, and the 100 Base T folks
- will beat us over the head with it. Make sure only the bare essentials
- are defined at this layer, defer the rest to the upper layers. Then
- drop the term adaptation layer, replace it with intelligent DMA. If
- this technology is boiled down to a single chip, as suggested by Dan,
- then the entire cell size issue goes away.
-
- 4) Simple Path Control
-
- Give the upper layers access to the path tables. Do not get involved
- in an addressing battle, let the network operating system folks fight
- that one.
-
-
- Cell relay will win the battle provided the industry does not turn off
- the enormous army of software developers ready to develop path based
- applications.
-
-
- By the way:
-
- Great job Telematics on the super frame relay switch you've developed.
-
-