HECnet May 2013

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38 participants
680 discussions

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by bqt＠softjar.se

On 2013-05-24 18:20, Paul_Koning at Dell.com wrote: On May 24, 2013, at 12:15 PM, Brian Schenkenberger, VAXman- wrote: ... So, here are a few photographs of some original Ethernet (10base5) bits I have here -- Etherpipe, AUI cables, and h4000s and h4005s. I put the camera away before I'd realized that I'd not photographed the tap tool. I hope you won't be too disappointed in that. http://tmesis.net/10base5/ Nice. Interesting to see the yellow stuff, I remember that in prototype installations but from what I was told, DEC switched to the brownish/orange teflon jacketed cable for customer shipments. Something to do with flame rating for air handling spaces (i.e., dropped ceiling office areas). I think we still have some yellow coax under the floor, still with transcievers attached, in the hall where Magica and Mim are located. However, the coax is cut somewhere, so it is no longer usable, and I don't think we have DEC transcievers, but I can't remember what we have. Maybe someone could check and take a photo. All of that was installed along with our two DEC-2060s back in the 80s... And it's definitely bright yellow. Johnny

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by mcguire＠neurotica.com

12 years

OT: old Ciscos, was Re: [HECnet] Ethernet Marks 40 Years Linking People, Computers in a Wired World

by mcguire＠neurotica.com

On 05/24/2013 08:58 AM, Clem Cole wrote: I fear a sad part of this slide show is that many of us remember and were part of it all. Some of us programmed these machines (I admit that I still have some of these pieces in my basement). I was disappointed they did not show a "stinger tap." The picture of the Alto shows the first mouse the Hawley Labs mechanical mouse (which I miss for its feel). Check out the picture of the first Cisco router using Intel Multibus (with a Motorola 68k in it) looking so awkward. That's a Cisco AGS or AGS+. I've deployed a bunch of those, and ran one for my home T1 for a long time (back when that was a lot of bandwidth!), and I still have one here, but it's about to get shipped out to Josh Dersch in Washington as part of a swap deal. But I still have an MGS and a CGS, which are the same thing but smaller chassis with fewer slots. Multibus, yes...but that's not the worst of it! Some here are no doubt familiar with NuBus, which is generally known as the expansion slot bus of the Apple Macintosh II. It's not an Apple bus, however! I don't recall where it hails from, but it's a general purpose bus, and a pretty nice one at that. Anyway, the difference between the AGS and the AGS+ is that the AGS+ card cage has a second backplane, with DIN-style triple-row connectors, where the Multibus P2 card-edge connectors would normally go. That's the Cbus, a 32-bit-wide bus operating at something like 16MHz, quite a bit faster than the Multibus interconnect. A Cbus Controller card was plugged in, which acted as a bridge between Multibus and Cbus. The Cbus Controller had a bit of very fast packet memory, and a purpose-built microcoded processor to handle communications. Packet memory was slotted dynamically at configuration time, divided up by the MTU settings on the attached interfaces. It was a very nice system; highly capable and very flexible. Peter will correct me if I'm wrong here, but the word on the street was that when the new "flagship" Cisco 7000 was introduced, its routing performance was lackluster compared to a well-configured AGS+, which caused some issues with 7000 adoption. Later 7000-family hardware enhancements corrected those performance issues. To drag this kicking and screaming to on-topicness...I'm sure someone here can tell the story of where ciscoSystems came from, more or less as a cash cow that eventually resulted in the founding of XKL. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by Paul_Koning＠Dell.com

On May 24, 2013, at 12:15 PM, Brian Schenkenberger, VAXman- wrote: ... So, here are a few photographs of some original Ethernet (10base5) bits I have here -- Etherpipe, AUI cables, and h4000s and h4005s. I put the camera away before I'd realized that I'd not photographed the tap tool. I hope you won't be too disappointed in that. http://tmesis.net/10base5/ Nice. Interesting to see the yellow stuff, I remember that in prototype installations but from what I was told, DEC switched to the brownish/orange teflon jacketed cable for customer shipments. Something to do with flame rating for air handling spaces (i.e., dropped ceiling office areas). paul

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by system＠TMESIS.COM

Gregg Levine <gregg.drwho8 at gmail.com> writes: On Fri, May 24, 2013 at 10:25 AM, Brian Schenkenberger, VAXman- <system at tmesis.com> wrote: h vlems <hvlems at zonnet.nl> writes: Yes, an H4005 was shown but no H4000 I've got some here if you want to see pictures of them. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity. Hello! (I did not see the fact that the original thread was cross-posted to the TUHS list as well as this one, until after the fact.) Now that I'd be interested in seeing. It happens that a shop in Manhattan was collecting and attempting to sell large quantities of Ethernet hardware. And I was the only buyer. It annoyed them that I was both the only buyer and the only one in the space who knew what they were. I wasn't feeling ambitious enough to trudge out the whole lighting "kit and kaboodle" <http://tmesis.net/Photography/Ummagumma.JPG>, so I took a few photos on the kitchen table with the 50mm f/1.2 using the available light from the kitchen window (not much since it's raining). That 50mm f/1.2 is very good in low lighting but it also has a depth of field that is thinner than rice paper, so the bokeh is quite evident in the photos I took. I would have needed the lighting kit to use any of the macros. I hope to someday build a light box so that I can do proper photographs of kit like this. So, here are a few photographs of some original Ethernet (10base5) bits I have here -- Etherpipe, AUI cables, and h4000s and h4005s. I put the camera away before I'd realized that I'd not photographed the tap tool. I hope you won't be too disappointed in that. http://tmesis.net/10base5/ -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity.

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by hvlems＠zonnet.nl

I'be installed plenty so no thanks Brian... Van: Brian Schenkenberger, VAXman- Verzonden: vrijdag 24 mei 2013 16:26 PM Aan: hecnet at Update.UU.SE Beantwoorden: hecnet at Update.UU.SE Onderwerp: Re: [HECnet] Ethernet Marks 40 Years Linking People, Computers in a Wired World h vlems <hvlems at zonnet.nl> writes: >Yes, an H4005 was shown but no H4000 I've got some here if you want to see pictures of them. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity.

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by gregg.drwho8＠gmail.com

On Fri, May 24, 2013 at 10:25 AM, Brian Schenkenberger, VAXman- <system at tmesis.com> wrote: h vlems <hvlems at zonnet.nl> writes: Yes, an H4005 was shown but no H4000 I've got some here if you want to see pictures of them. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity. Hello! (I did not see the fact that the original thread was cross-posted to the TUHS list as well as this one, until after the fact.) Now that I'd be interested in seeing. It happens that a shop in Manhattan was collecting and attempting to sell large quantities of Ethernet hardware. And I was the only buyer. It annoyed them that I was both the only buyer and the only one in the space who knew what they were. ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again."

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by system＠TMESIS.COM

h vlems <hvlems at zonnet.nl> writes: Yes, an H4005 was shown but no H4000 I've got some here if you want to see pictures of them. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity.

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by hvlems＠zonnet.nl

Yes, an H4005 was shown but no H4000 Van: Gregg Levine Verzonden: vrijdag 24 mei 2013 15:58 PM Aan: hecnet at update.uu.se Beantwoorden: hecnet at Update.UU.SE Cc: tuhs at minnie.tuhs.org; dectec-request at dectec.info Onderwerp: Re: [HECnet] Ethernet Marks 40 Years Linking People, Computers in a Wired World On Fri, May 24, 2013 at 8:58 AM, Clem Cole <clemc at ccc.com> wrote: > I fear a sad part of this slide show is that many of us remember and were > part of it all. Some of us programmed these machines (I admit that I > still have some of these pieces in my basement). I was disappointed they > did not show a "stinger tap." The picture of the Alto shows the first mouse > the Hawley Labs mechanical mouse (which I miss for its feel). Check out > the picture of the first Cisco router using Intel Multibus (with a Motorola > 68k in it) looking so awkward. > > http://www.eweek.com/networking/slideshows/ethernet-marks-40-years-linking-… Hello! Then you did not notice the one which attempts to describe the widget attached to the yellow cable. It was a tap who used the stinger design. It was an interesting slide show, but it did not go into complete detail. Charles Spurgeon wrote an excellent book on Ethernet which as it happens to explain practically everything about the entire ideas behind it. ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again."

12 years

Ethernet Marks 40 Years Linking People, Computers in a Wired World

by gregg.drwho8＠gmail.com

On Fri, May 24, 2013 at 8:58 AM, Clem Cole <clemc at ccc.com> wrote: I fear a sad part of this slide show is that many of us remember and were part of it all. Some of us programmed these machines (I admit that I still have some of these pieces in my basement). I was disappointed they did not show a "stinger tap." The picture of the Alto shows the first mouse the Hawley Labs mechanical mouse (which I miss for its feel). Check out the picture of the first Cisco router using Intel Multibus (with a Motorola 68k in it) looking so awkward. http://www.eweek.com/networking/slideshows/ethernet-marks-40-years-linking-… Hello! Then you did not notice the one which attempts to describe the widget attached to the yellow cable. It was a tap who used the stinger design. It was an interesting slide show, but it did not go into complete detail. Charles Spurgeon wrote an excellent book on Ethernet which as it happens to explain practically everything about the entire ideas behind it. ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again."

12 years

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HECnet May 2013