I thought all the new ethernet stuff does jumbo frames for those that like that kind of thing anyways....
Not true, not unless the implementation is crummy. Any halfway decent fast Ethernet host will run at wire speed, and the difference between 1500 and 4460 MTU isn't enough to amount to very much.
paul
On Jul 12, 2011, at 5:29 PM, <hvlems at zonnet.nl> <hvlems at zonnet.nl> wrote:
It took HP until 2006 to replace the FDDI lan with ethernet technolgy. The fault tolerance of FDDI and the build quality of DEC's gigaswitch products.
The bandwidth of FDDI is a lot better than fast ethernet.
Not true, not unless the implementation is crummy. Any halfway decent fast Ethernet host will run at wire speed, and the difference between 1500 and 4460 MTU isn't enough to amount to very much.
paul
While we are on the topic, does anyone have any experience with TOPS-20 / DECNET? I've haven't had time to mess with it of late, but I was unsuccessful in a previous evening's attempt or two.
I've had mixed luck with it. I did manage to get it up and running on my Panda distribution, but then I changed DECnet addresses, and my attempt to get it working again didn't go well. I believe that NCP continued to complain that my DECnet address was invalid (perhaps saying that the number was greater than 63, but it wasn't).
I don't have the system up right now and I'm remote at the moment, but if there are any specifics I can try to recall for you, I'll do what I can.
I will say that I modified the hardware address of the Unix (Solaris, in my case) network interface and also in the Panda configuration for the NI device to reflect the appropriate AA-00-04-00-xx-xx value. The place where I got stuck was in the NCP configuration in whichever <SYSTEM> .CMD file it was that the system uses at boot time.
--Marc
FEC (fast ether channel) killed any hopes of FDDI, but it was more so people in certain places that bought into the hopes and dreams of FDDI....
It was also my understanding you needed licenses to make FDDI gear while Ethernet was/is free.
On Tue, Jul 12, 2011 at 5:29 PM, <hvlems at zonnet.nl> wrote:
It took HP until 2006 to replace the FDDI lan with ethernet technolgy. The fault tolerance of FDDI and the build quality of DEC's gigaswitch products.
The bandwidth of FDDI is a lot better than fast ethernet.
Hans
Verzonden vanaf mijn draadloze BlackBerry -toestel
From: Joe Ferraro <jferraro at gmail.com>
Sender: owner-hecnet at Update.UU.SE
Date: Tue, 12 Jul 2011 17:12:02 -0400
To: <hecnet at update.uu.se>
ReplyTo: hecnet at Update.UU.SE
Subject: Re: [HECnet] Towards the Mouth of Madness....
Off topic... I received a page, a few weeks prior, on a machine that was not pinging. Turns out, it was one of a few old NOVA class boxes we still have at my work, using FDDI for connectivity. Fortunately, a disconnect / reconnect brought the ring back online; I was scared (and a bit excited in a strange way) for a few moments that I was going to have to do some extensive troubleshooting... FDDI still lives.
On Tue, Jul 12, 2011 at 4:27 PM, H Vlems <hvlems at zonnet.nl> wrote:
Remember what I wrote: this happened nearly two decades ago.
IP is the protocol that survived and most people aren t even aware what happened on local area networks before, say,1998.
I worked for Fuji, photosensitive films, paper and offset printing products.
Most of the IT equipment was made by DEC: PDP-11 s (/44, /84, /93, /24, /73 and /23), VAXes, an IBM mainframe (4081) and PC s.
And lots of other gear, most of it in the research lab. A Motorola box that ran Motorola Unix, and an RS/6000 under AIX 2.4 (?).
The lingua franca was DECnet and LAT. No IP, though some PC s used Novell and SNA over tokenring to make terminal emulation to the mainframe possible.
No IP. Sounds weird in today s world but DECnet eventually connected everything. We got a *very* early Cisco router that did level 1
DECnet routing between the corporate ethernet and the finance dept token ring. Another (DEC) box that routed DECnet over Datanet/1 (that s X25 in Europe IIRC). The mainframe used an SNA/DECnet gateway (the big channel attached box).
The RS/6000 and the Motorola systems also ran DECnet, endnode only.
To make this a little interesting we ran the first FDDI network in the Netherlands.
Trouble shooting wasn t always easy, especially if the SNA/DECnet gateway was involved!
Hans
Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens Jason Stevens Verzonden: dinsdag, juli 2011 21:10 Aan: hecnet at update.uu.se Onderwerp: Re: [HECnet] Towards the Mouth of Madness....
AIX and decnet? now that'd be ... non conformist & fun!
Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 10.0.1388 / Virusdatabase: 1516/3760 - datum van uitgifte: 07/12/11
It took HP until 2006 to replace the FDDI lan with ethernet technolgy. The fault tolerance of FDDI and the build quality of DEC's gigaswitch products.
The bandwidth of FDDI is a lot better than fast ethernet.
Hans
Verzonden vanaf mijn draadloze BlackBerry -toestel
From: Joe Ferraro <jferraro at gmail.com>
Sender: owner-hecnet at Update.UU.SE
Date: Tue, 12 Jul 2011 17:12:02 -0400
To: <hecnet at update.uu.se>
ReplyTo: hecnet at Update.UU.SE
Subject: Re: [HECnet] Towards the Mouth of Madness....
Off topic... I received a page, a few weeks prior, on a machine that was not pinging. Turns out, it was one of a few old NOVA class boxes we still have at my work, using FDDI for connectivity. Fortunately, a disconnect / reconnect brought the ring back online; I was scared (and a bit excited in a strange way) for a few moments that I was going to have to do some extensive troubleshooting... FDDI still lives.
On Tue, Jul 12, 2011 at 4:27 PM, H Vlems <hvlems at zonnet.nl> wrote:
Remember what I wrote: this happened nearly two decades ago.
IP is the protocol that survived and most people aren t even aware what happened on local area networks before, say,1998.
I worked for Fuji, photosensitive films, paper and offset printing products.
Most of the IT equipment was made by DEC: PDP-11 s (/44, /84, /93, /24, /73 and /23), VAXes, an IBM mainframe (4081) and PC s.
And lots of other gear, most of it in the research lab. A Motorola box that ran Motorola Unix, and an RS/6000 under AIX 2.4 (?).
The lingua franca was DECnet and LAT. No IP, though some PC s used Novell and SNA over tokenring to make terminal emulation to the mainframe possible.
No IP. Sounds weird in today s world but DECnet eventually connected everything. We got a *very* early Cisco router that did level 1
DECnet routing between the corporate ethernet and the finance dept token ring. Another (DEC) box that routed DECnet over Datanet/1 (that s X25 in Europe IIRC). The mainframe used an SNA/DECnet gateway (the big channel attached box).
The RS/6000 and the Motorola systems also ran DECnet, endnode only.
To make this a little interesting we ran the first FDDI network in the Netherlands.
Trouble shooting wasn t always easy, especially if the SNA/DECnet gateway was involved!
Hans
Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens Jason Stevens Verzonden: dinsdag, juli 2011 21:10 Aan: hecnet at update.uu.se Onderwerp: Re: [HECnet] Towards the Mouth of Madness....
AIX and decnet? now that'd be ... non conformist & fun!
Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 10.0.1388 / Virusdatabase: 1516/3760 - datum van uitgifte: 07/12/11
Wow I haven't touched FDDI since ... 2001? There was some AT&T X11 NCR monster (something like a 32way pentium running SYSVr4) serving out all these tn3270 sessions to Windows NT 4.0 & Hummingbird eXceede.... Because AT&T was just plain weird with their mainframe... You couldn't get a SNA LU6.2 or 3270 session from them, but instead tn3270 that was even more so quirky regarding it's timing (for those who have used cisco routers for local ack to fake out the constant chatter in SNA)... Anyways the giant glorified PC was connected via FDDI to a cisco 7000. The one day it went down, I just broke the ring, and made it a single connection and it came up.
Ugh it was such a disaster, it was almost a happy day when they rolled in with 8 way PIII's ... to run the same tn3270 thing.
While on these grueling 3+ hour phone calls with AT&T they actually hired someone that would run ping....
On Tue, Jul 12, 2011 at 5:12 PM, Joe Ferraro <jferraro at gmail.com> wrote:
Off topic... I received a page, a few weeks prior, on a machine that was not pinging. Turns out, it was one of a few old NOVA class boxes we still have at my work, using FDDI for connectivity. Fortunately, a disconnect / reconnect brought the ring back online; I was scared (and a bit excited in a strange way) for a few moments that I was going to have to do some extensive troubleshooting... FDDI still lives.
On Tue, Jul 12, 2011 at 4:27 PM, H Vlems <hvlems at zonnet.nl> wrote:
Remember what I wrote: this happened nearly two decades ago.
IP is the protocol that survived and most people aren t even aware what happened on local area networks before, say,1998.
I worked for Fuji, photosensitive films, paper and offset printing products.
Most of the IT equipment was made by DEC: PDP-11 s (/44, /84, /93, /24, /73 and /23), VAXes, an IBM mainframe (4081) and PC s.
And lots of other gear, most of it in the research lab. A Motorola box that ran Motorola Unix, and an RS/6000 under AIX 2.4 (?).
The lingua franca was DECnet and LAT. No IP, though some PC s used Novell and SNA over tokenring to make terminal emulation to the mainframe possible.
No IP. Sounds weird in today s world but DECnet eventually connected everything. We got a *very* early Cisco router that did level 1
DECnet routing between the corporate ethernet and the finance dept token ring. Another (DEC) box that routed DECnet over Datanet/1 (that s X25 in Europe IIRC). The mainframe used an SNA/DECnet gateway (the big channel attached box).
The RS/6000 and the Motorola systems also ran DECnet, endnode only.
To make this a little interesting we ran the first FDDI network in the Netherlands.
Trouble shooting wasn t always easy, especially if the SNA/DECnet gateway was involved!
Hans
Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens Jason Stevens Verzonden: dinsdag, juli 2011 21:10 Aan: hecnet at update.uu.se Onderwerp: Re: [HECnet] Towards the Mouth of Madness....
AIX and decnet? now that'd be ... non conformist & fun!
Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 10.0.1388 / Virusdatabase: 1516/3760 - datum van uitgifte: 07/12/11
Joe, perhaps others know about that: my knowledge about TOPS is zero.
You night want to discuss it with the folks at alt,sys.pdp10
Hans
Verzonden vanaf mijn draadloze BlackBerry -toestel
From: Joe Ferraro <jferraro at gmail.com>
Sender: owner-hecnet at Update.UU.SE
Date: Tue, 12 Jul 2011 17:14:16 -0400
To: <hecnet at update.uu.se>
ReplyTo: hecnet at Update.UU.SE
Subject: Re: [HECnet] Towards the Mouth of Madness....
While we are on the topic, does anyone have any experience with TOPS-20 / DECNET? I've haven't had time to mess with it of late, but I was unsuccessful in a previous evening's attempt or two.
On Tue, Jul 12, 2011 at 5:11 PM, Mark Benson <md.benson at gmail.com> wrote:
On 12 Jul 2011, at 21:48, hvlems at zonnet.nl wrote:
> DECnet/AIX was a 3rd party effort IIRC
> I haven't searched the internet yet but who knows what is available.
> Perhaps the opensource decnet kit may be portable.
I know there's a DECNet kit for Linux out there somewhere. Not sure about anything else. Nothing crops up on a quick Google search that isn't dated early 90s.
> I wasn't aware that AIX was so hobbyist friendly. The hardware is vey unfamiliar for me though.
The hardware is generally pretty unique (save for it's similarity in patches to PPC Macs) - all IBM stuff generally is. The OS is proprietary but you can pick up media kits off eBay for not a lot. Also IBM documentation, certainly for RS/6000 / pSeries hardware and AIX, is readily available online without even needing a login.
--
Mark Benson
My Blog:
<http://markbenson.org/blog>
Follow me on Twitter:
http://twitter.com/mdbenson
"Never send a human to do a machine's job..."
While we are on the topic, does anyone have any experience with TOPS-20 / DECNET? I've haven't had time to mess with it of late, but I was unsuccessful in a previous evening's attempt or two.
On Tue, Jul 12, 2011 at 5:11 PM, Mark Benson <md.benson at gmail.com> wrote:
On 12 Jul 2011, at 21:48, hvlems at zonnet.nl wrote:
> DECnet/AIX was a 3rd party effort IIRC
> I haven't searched the internet yet but who knows what is available.
> Perhaps the opensource decnet kit may be portable.
I know there's a DECNet kit for Linux out there somewhere. Not sure about anything else. Nothing crops up on a quick Google search that isn't dated early 90s.
> I wasn't aware that AIX was so hobbyist friendly. The hardware is vey unfamiliar for me though.
The hardware is generally pretty unique (save for it's similarity in patches to PPC Macs) - all IBM stuff generally is. The OS is proprietary but you can pick up media kits off eBay for not a lot. Also IBM documentation, certainly for RS/6000 / pSeries hardware and AIX, is readily available online without even needing a login.
--
Mark Benson
My Blog:
<http://markbenson.org/blog>
Follow me on Twitter:
http://twitter.com/mdbenson
"Never send a human to do a machine's job..."
Off topic... I received a page, a few weeks prior, on a machine that was not pinging. Turns out, it was one of a few old NOVA class boxes we still have at my work, using FDDI for connectivity. Fortunately, a disconnect / reconnect brought the ring back online; I was scared (and a bit excited in a strange way) for a few moments that I was going to have to do some extensive troubleshooting... FDDI still lives.
On Tue, Jul 12, 2011 at 4:27 PM, H Vlems <hvlems at zonnet.nl> wrote:
Remember what I wrote: this happened nearly two decades ago.
IP is the protocol that survived and most people aren t even aware what happened on local area networks before, say,1998.
I worked for Fuji, photosensitive films, paper and offset printing products.
Most of the IT equipment was made by DEC: PDP-11 s (/44, /84, /93, /24, /73 and /23), VAXes, an IBM mainframe (4081) and PC s.
And lots of other gear, most of it in the research lab. A Motorola box that ran Motorola Unix, and an RS/6000 under AIX 2.4 (?).
The lingua franca was DECnet and LAT. No IP, though some PC s used Novell and SNA over tokenring to make terminal emulation to the mainframe possible.
No IP. Sounds weird in today s world but DECnet eventually connected everything. We got a *very* early Cisco router that did level 1
DECnet routing between the corporate ethernet and the finance dept token ring. Another (DEC) box that routed DECnet over Datanet/1 (that s X25 in Europe IIRC). The mainframe used an SNA/DECnet gateway (the big channel attached box).
The RS/6000 and the Motorola systems also ran DECnet, endnode only.
To make this a little interesting we ran the first FDDI network in the Netherlands.
Trouble shooting wasn t always easy, especially if the SNA/DECnet gateway was involved!
Hans
Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens Jason Stevens Verzonden: dinsdag, juli 2011 21:10 Aan: hecnet at update.uu.se Onderwerp: Re: [HECnet] Towards the Mouth of Madness....
AIX and decnet? now that'd be ... non conformist & fun!
Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 10.0.1388 / Virusdatabase: 1516/3760 - datum van uitgifte: 07/12/11
On 12 Jul 2011, at 21:48, hvlems at zonnet.nl wrote:
DECnet/AIX was a 3rd party effort IIRC
I haven't searched the internet yet but who knows what is available.
Perhaps the opensource decnet kit may be portable.
I know there's a DECNet kit for Linux out there somewhere. Not sure about anything else. Nothing crops up on a quick Google search that isn't dated early 90s.
I wasn't aware that AIX was so hobbyist friendly. The hardware is vey unfamiliar for me though.
The hardware is generally pretty unique (save for it's similarity in patches to PPC Macs) - all IBM stuff generally is. The OS is proprietary but you can pick up media kits off eBay for not a lot. Also IBM documentation, certainly for RS/6000 / pSeries hardware and AIX, is readily available online without even needing a login.
--
Mark Benson
My Blog:
<http://markbenson.org/blog>
Follow me on Twitter:
http://twitter.com/mdbenson
"Never send a human to do a machine's job..."
