I've a system w/ 5 NICs, 4 of which are to be configured up, with no addresses.
/etc/network/interfaces auto lo eth0 eth1 eth2 eth3 eth4 iface lo inet loopback address 127.0.0.1 netmask 255.0.0.0 iface eth0 inet static address 10.9.8.228 netmask 255.255.255.192 gateway 10.9.8.254 iface eth1 inet manual up echo iface eth2 inet manual up echo iface eth3 inet manual up echo iface eth4 inet manual up echo At boot, when NetworkManager gets a hold of things, no interfaces are properly configured, and eth2 is the "better connection" (syslog attached). Here's ifconfig eth0 Link encap:Ethernet HWaddr 00:18:8B:7D:3A:97 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:87 errors:0 dropped:0 overruns:0 frame:0 TX packets:12 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:10244 (10.0 KiB) TX bytes:998 (998.0 b) Interrupt:17 eth1 Link encap:Ethernet HWaddr 00:15:17:15:AD:00 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 b) TX bytes:492 (492.0 b) Base address:0xdcc0 Memory:e7e80000-e7ea0000 eth2 Link encap:Ethernet HWaddr 00:15:17:15:AD:01 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:155 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9920 (9.6 KiB) TX bytes:316 (316.0 b) Base address:0xdce0 Memory:e7ec0000-e7ee0000 eth3 Link encap:Ethernet HWaddr 00:15:17:15:AD:02 UP BROADCAST 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:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Base address:0xccc0 Memory:e7c80000-e7ca0000 eth4 Link encap:Ethernet HWaddr 00:15:17:15:AD:03 UP BROADCAST 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:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Base address:0xcce0 Memory:e7cc0000-e7ce0000 Getting even more curious, after doing 'sudo /etc/init.d/networking restart' , the network configuration is as I would expect. This is BROKEN. Running kubuntu feisty, fully updated as of 20070328. ** Attachment added: "Relevant syslog stuff" http://librarian.launchpad.net/7036902/syslog_NetworkManager -- network-manager should not set offline mode when it manages no device https://launchpad.net/bugs/82335 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs