gboice@csm9a.UUCP (R CC) (07/28/90)
Recently I installed a RS/6000 model 320. The ethernet board has both a thick wire and a thin wire port. The thinwire port is located at the bottom of the board. The board is located between a scsi adapter and a Display adapter. The problem is that it is close to impossible to place a T connector on the thinwire port. There is a bottom plate that prohibits the T. Right now I have the T crammed into the back of the machine. This is not a desirable situation. I am afraid that eventually the thin wire will short. I tried to utilize the thickwire port and got no response. When I changed over to thinwire the network worked fine. I also tried using a thick wire port on a 530, same problem. Is there a change to the board (like a jumper setting) needed to utilize the thickwire port? Short of using thickwire I could rearrange the board placement on the bus so that the thinwire port would not be inhibited. Is the board placement on the bus specific? The ethernet board is fine for the larger units, but on the 320 it is badly designed. If the thick and thin wire ports were changed there would be no problem. Gina Boice Colorado School of Mines gboice@Mines.Colorado.EDU
drake@drake.almaden.ibm.com (07/30/90)
In article <2219@csm9a.UUCP> gboice@csm9a.UUCP (R CC) writes: >I tried >to utilize the thickwire port and got no response. When I changed over to >thinwire the network worked fine. I also tried using a thick wire port >on a 530, same problem. Is there a change to the board (like a jumper setting) >needed to utilize the thickwire port? No change to the board, but a change to the software. Log on as root, run smit, select "devices", then "communication devices", then "ethernet adapter", then "adapter", then "change/show characteristics of an ethernet adapter". It will show you a list of the ones it knows about; select the one you want (probably en0). Then you'll get a list of all the adapter's attributes; one will be "adapter connector". This will read either bnc (thin) or dix (thick). Use the tab key to toggle between them. When it's how you want it, press enter to change it, then f10 to exit smit. Then examine smit.script to see what command it executed in case you want to do it again without using the menus. >Short of using thickwire I could rearrange the board placement on the bus >so that the thinwire port would not be inhibited. Is the board placement >on the bus specific? Sort of. If you had the Ethernet port configured as "en0" and placed in slot 2, then took it out and put it in slot 3, the system would decide that en0 was down and that a new device, en1, had been plugged in. Since no configuration had been done for en1, it wouldn't be used for anything. If you move it, you'll have to redo the bnc/dix selection for en1, and will have to reconfigure TCP/IP to use en1 instead of en0. Run smit, select Communications; select TCP/IP; select Minimum configuration; select en1; then enter the IP addresses and domain names to be used for this adapter. Opinions are my own. Sam Drake / IBM Almaden Research Center Internet: drake@ibm.com BITNET: DRAKE at ALMADEN Usenet: ...!uunet!ibmarc!drake Phone: (408) 927-1861