<div dir="ltr"><div dir="ltr"><div><br></div><div>On Tue, 27 Feb 2024 17:58:02, Kenneth Seefried wrote:<br></div><div><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">[...]<br>
ATM is one of the very few network technologies I *never* say "I should<br>
pull together the parts to build a network to play with".<br>
<br></blockquote><div><br></div><div>This made me laugh, because I wholeheartedly agree... having kinda done exactly that "back in the day." Not really on purpose, though. :-)</div><div><br> </div><div>A couple of decades ago (ouch) a friend gave me a pile of old ATM gear that was being decommissioned from a lab at the grad school where we worked. They'd done a bunch of research on streaming video (late '90s/early '00s) and QoS atop IPv4 and ATM (probably LANE, can't recall the details now). I picked up a couple of Fore Systems switches and several Fore Sbus and EISA cards. (They'd been using HP9000/700 series with ATM and cool Parallax XV700 video overlay cards for their testing -- naturally I snagged a 735 and the 755 as well!)<br></div><div><br></div><div>I was surprised to learn that the ForeRunner ASX200 is actually a small rack-mountable 3-ish slot VME cage with a SPARCengine as the management card! The internal disk drive (!!) in one of the ForeRunners was bad, so I rebuilt it (sanely -- Fore's default installation was bonkers) and still have some transcripts:</div><div><br></div></div><div>[...]<br></div><div style="margin-left:40px">ok banner<br>SPARC CPU-3CE, No Keyboard<br>ROM Rev. 2.10.1, 16 MB memory installed, Serial #764843.<br>Ethernet address 8:0:20:b:ab:ab, Host ID: 800babab.<br><br>ok boot disk<br>Boot device: /iommu/sbus/espdma@4,8400000/esp@4,8800000/sd@3,0 File and args: <br>root on /iommu@0,10000000/sbus@0,10001000/espdma@4,8400000/esp@4,8800000/sd@3,0:<br>a fstype 4.2<br>Boot: vmunix<br>Size: 1933312+470824+761352 bytes<br>PAC ENABLED<br>SunOS Release 4.1.3F (ASX_200) #740: Tue Jul 7 17:16:14 GMT-0400 1998<br>Copyright (c) 1983-1992, Sun Microsystems, Inc.<br>cpu = SPARC,CPU-3CE<br>mod0 = TI,TMS390S10 (mid = 0)<br>mem = 16004K (0xfa1000)<br>avail mem = 11436032<br>entering uniprocessor mode<br>Ethernet address = 8:0:20:b:ab:ab<br>espdma0 at SBus slot 4 0x8400000<br>esp0 at SBus slot 4 0x8800000 pri 4 (onboard)<br>sd0 at esp0 target 3 lun 0<br>sd0: <Quantum GoDrive GLS127S cyl 675 alt 2 hd 9 sec 41><br>audio0 at obio 0x300000 pri 13 (sbus level 7)<br>SUNW,bpp0 at SBus slot 4 0xc800000 pri 3 (sbus level 2)<br>ledma0 at SBus slot 4 0x8400010<br>le0 at SBus slot 4 0x8c00000 pri 6 (onboard)<br>VME0 at SBus slot 0 0xfe00000 and obio 0x380000<br> FORCE SPARC CPU-3CE (Rev. 0.3)<br> FORCE Solaris 1.1F CPU-3CE VME Driver (nexus & memplus) Version 1.0<br> Master Window: 0x10000000-0x1fffffff (a32map=0x1)<br> Slave Window: 0x0-0xfffff (slavemap=0x80)<br> A16 Mail Box: 0x0 (mbox=0x0)<br></div><div style="margin-left:40px"> VME Interrupt Level Enable: 1, 2, 3, 4, 5, 6, 7, (intenable=0xfe)</div><div>[...]<br><div style="margin-left:40px">asx200 login: root<br>Last login: Fri Sep 10 01:22:10 on ttya<br>SunOS Release 4.1.3F (ASX_200) #740: Tue Jul 7 17:16:14 GMT-0400 1998<br>asx200# df<br>Filesystem kbytes used avail capacity Mounted on<br>/dev/sd0a 43958 15241 24322 39% /<br>/dev/sd0g 43958 36291 3272 92% /usr<br>/dev/sd0f 13783 104 12301 1% /var<br>asx200# ifconfig -a<br>le0: flags=63<UP,BROADCAST,NOTRAILERS,RUNNING><br> inet 192.168.1.199 netmask ffffff00 broadcast 192.168.1.255<br> ether 8:0:20:b:ab:ab <br>asx0: flags=862<BROADCAST,NOTRAILERS,RUNNING><br> inet 1.1.1.1 netmask ff000000 broadcast 1.255.255.255<br> ether 0:0:0:0:0:0 <br>qaa0: flags=60<NOTRAILERS,RUNNING><br> ether 0:0:0:0:0:0 <br></div>[...]<br></div></div><div><br></div><div>IIRC, it was basically a stock SunOS 4 install, plus the usual custom kernel config to add Fore's drivers, startup scripts, and patches; the utilities were in /atm/bin but there was a menu/shell thing for management atop the Unix CLI. I learned enough about it to be dangerous, with an SS20 and the two HPs eventually talking to the switch and making the lights blink furiously as I pushed some big files around to see how it stacked up against FDDI or FastEthernet. Good times.<br></div><div><br></div><div>So for a while in the early Noughties my home network comprised a small FDDI ring for NFS traffic into my old Netapp F330s and Sun4 servers, the three aforementioned ATM clients hanging off the ForeRunner, thick-, thin- and twisted pair 10Mbit Ethernet hubs and switches connecting my older 32-bit NeXT, Sun, Tek, SGI, DEC and PERQ workstations, FastEthernet backbone tying all that to my Cisco switch cluster for the higher-end Sparcs and desktop daily drivers, Gigabit Ethernet (fiber and TP) to my F700 and F800 Netapps and the Ultras, 7Mbit ADSL line to the outside, a 1Mbit Farallon "homeline" Ethernet to my upstairs tenant, and even a UUCP feed over an old
33.6Kbaud fax modem for a small NNTP feed and to connect my mom's NeXT to her Postscript service bureau. I'm sure at one point or another I employed smoke signals, avian carriers, sneaker net with floppies, a station wagon full of magtapes, two cans with a string... and of course, throw in an obligatory ISDN jab here too.<br></div><div><br></div><div>It was the "standing up in a canoe" of home
networking setups, to be sure.</div><div class="gmail_quote"><br></div><div class="gmail_quote">But if that ATM kit hadn't been free, I definitely would never have gone out lookin' for it! :-)</div><br></div>