I have two older notebook computers (486's) I've been trying to network together, and can't seem to get it to work for some reason, and I was wondering if anyone could tell me what I'm doing wrong. Here's what I'm doing. I recently picked up two used IBM ethernet cards (pcmcia - cardmgr reports them as "IBM Credit Card Ethernet" in /var/log/messages). These have BNC connectors on them. I also picked up two BNC tee connectors, two terminators, two BNC to RJ11 adapters, and a 2' cord with an RJ11 plug on each end. I hook everything up in the obvious way, and then proceed as follows (I should mention that the hostnames for the two computers are gamma and delta; gamma is running Slackware 7.1 and delta is running Slackware 4.0). First, I put the addresses of gamma (192.168.0.3) and delta (192.168.0.4) in the /etc/hosts file of each computer. Then, on gamma, I do this: |root@gamma:~# ifconfig eth0 gamma |root@gamma:~# route add -host delta eth0 |root@gamma:~# ifconfig |eth0 Link encap:Ethernet HWaddr 00:06:29:14:42:1A | inet addr:192.168.0.3 Bcast:192.168.0.255 Mask:255.255.255.0 | UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 | RX packets:0 errors:0 dropped:0 overruns:0 frame:0 | TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 | collisions:0 txqueuelen:100 | Interrupt:3 Base address:0x300 Memory:c00d1000-c00d5000 | |lo Link encap:Local Loopback | inet addr:127.0.0.1 Mask:255.0.0.0 | UP LOOPBACK RUNNING MTU:3924 Metric:1 | RX packets:18 errors:0 dropped:0 overruns:0 frame:0 | TX packets:18 errors:0 dropped:0 overruns:0 carrier:0 | collisions:0 txqueuelen:0 | |root@gamma:~# route -n |Kernel IP routing table |Destination Gateway Genmask Flags Metric Ref Use Iface |192.168.0.4 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 |192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 |127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo Then, on delta, I do this: |root@delta:~# ifconfig eth0 delta |root@delta:~# route add -host gamma eth0 |root@delta:~# ifconfig |eth0 Link encap:Ethernet HWaddr 00:04:AC:90:52:E9 | UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 | RX packets:0 errors:0 dropped:0 overruns:0 frame:0 | TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 | collisions:0 txqueuelen:100 | Interrupt:3 Base address:0x300 Memory:c00d1000-c00d5000 | |lo Link encap:Local Loopback | inet addr:127.0.0.1 Mask:255.0.0.0 | UP LOOPBACK RUNNING MTU:3924 Metric:1 | RX packets:11121 errors:0 dropped:0 overruns:0 frame:0 | TX packets:11121 errors:0 dropped:0 overruns:0 carrier:0 | collisions:0 txqueuelen:0 | |root@delta:~# route -n |Kernel IP routing table |Destination Gateway Genmask Flags Metric Ref Use Iface |192.168.0.3 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 |127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo So far, everything looks good, as far as I can tell, but if I try to ping either machine from the other, I get nothing back. I also can't telnet or ftp from one machine to the other. I might add that I've successfully done all of these things with pppd and a null modem through the serial ports, but I'd like a faster connection. I've tried a few variations of the above, setting a default route and gateway, for example, but it seems that the above ought to work as is. I have tcpdump on gamma, but not on delta, and when I run it, I can see outgoing packets, but not incoming packets. The LEDs on both interfaces flash rhythmically when I run ping from either machine, so the 2' cord between them must be good, but I don't know what's coming across because I can't see anything with tcpdump. Am I missing something? Any help would be appreciated. Chuck - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu
