Date: Fri, 18 Nov 2005 19:46:16 -0500 From: James Wilkinson <jimmy@cs.cofc.edu> To: freebsd-questions@freebsd.org Subject: What have they done to my SLIP? Message-ID: <a06230907bfa41f72c464@[153.9.17.129]>
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When I taught our networking course two and a half years ago we connected some of the machines in the lab using null modem cables on the serial ports and SLIP. The setup was dead trivial, and it worked the first time and every time. Most of the connections use Ethernet, but I thought that they should at least see an example of a point-to-point link. I tried it again this fall using the same cables similar machines (Dell GX110) and had no success at all. We tried several of the cables connecting different pairs of machines and always got the same result: ifconfig would report that the IP addresses were in place; netstat would report that the routes were there; ping would claim to be sending packets, but had 100% packet loss. We installed the version of FreeBSD that was current at the time in both instances: 4.something back then and 5.4 this time. That's the only difference I can think of between then and now. Setup was slattach -lchs 9600 /dev/ttyd0 ifconfig sl0 inet 10.0.0.1 10.0.0.2 netmask 255.255.255.255 That's all. Back then I think we did the ifconfig first. Now we have to do the slattach first to get the sl0 device to appear. I've looked at ppp, but it seems much more complicated. I've found instructions for setting it up, but they all assume that it will be used with a modem to connect to an ISP. I've never found any any place that will tell me how to set it up using the null modem cables. Can anybody tell me how to get something to work? I'd settle for either SLIP or PPP. Thanks -- ------------------------------------------------------------- Jimmy Wilkinson | Professor of Computer Science jimmy@cs.CofC.edu | The College of Charleston (843) 953-8160 | Charleston SC 29424 http://www.cs.cofc.edu/~jimmy If there is one word to describe me, that word would have to be "profectionist". Any form of incompitence is an athema to me. Metathesis??? Don't ax me. Just between you and I, the grammar used by Americans are getting worse. I can only help but wonder what the cause of this might be. It just ceases to amaze me how it could be the case, but mostly I could care less.
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