Hi Chuck, from the ifconfig output on delta I can see that you have no IP address defined for delta's eth0. bye Peter ----- Original Message ----- From: "Chuck Martin" <cmartin@bigfoot.com> To: <linux-net@vger.rutgers.edu> Sent: Friday, July 21, 2000 1:55 AM Subject: Notebook ethernet problems > 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 - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu
