# ifconfig eth1 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17291 errors:0 dropped:0 overruns:0 frame:0 TX packets:706 errors:0 dropped:0 overruns:0 carrier:0 collisions:11 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 EtherTalk Phase 2 addr:0/0 UP LOOPBACK RUNNING MTU:3924 Metric:1 RX packets:3259 errors:0 dropped:0 overruns:0 frame:0 TX packets:3259 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 # ifconfig eth0 10.1.2.3 up # ifconfig eth0:1 10.1.2.4 up # ifconfig eth0:2 10.1.2.5 up # ifconfig eth0 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.3 Bcast:10.255.255.255 Mask:255.0.0.0 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 eth0:1 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.4 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth0:2 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.5 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth1 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17310 errors:0 dropped:0 overruns:0 frame:0 TX packets:707 errors:0 dropped:0 overruns:0 carrier:0 collisions:11 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 EtherTalk Phase 2 addr:0/0 UP LOOPBACK RUNNING MTU:3924 Metric:1 RX packets:3259 errors:0 dropped:0 overruns:0 frame:0 TX packets:3259 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 # ifconfig eth0:2 0.0.0.0 -> bring down #2, works as expected: # ifconfig eth0 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.3 Bcast:10.255.255.255 Mask:255.0.0.0 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 eth0:1 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.4 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth1 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17314 errors:0 dropped:0 overruns:0 frame:0 TX packets:707 errors:0 dropped:0 overruns:0 carrier:0 collisions:11 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 EtherTalk Phase 2 addr:0/0 UP LOOPBACK RUNNING MTU:3924 Metric:1 RX packets:3259 errors:0 dropped:0 overruns:0 frame:0 TX packets:3259 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 # ifconfig eth0:2 10.1.2.5 up --> bring #2 back up # ifconfig eth0 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.3 Bcast:10.255.255.255 Mask:255.0.0.0 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 eth0:1 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.4 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth0:2 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.5 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth1 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17310 errors:0 dropped:0 overruns:0 frame:0 TX packets:707 errors:0 dropped:0 overruns:0 carrier:0 collisions:11 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 EtherTalk Phase 2 addr:0/0 UP LOOPBACK RUNNING MTU:3924 Metric:1 RX packets:3259 errors:0 dropped:0 overruns:0 frame:0 TX packets:3259 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 # ifconfig eth0:1 0.0.0.0 -> now take out 1st virtual interface # ifconfig eth0 Link encap:Ethernet HWaddr 00:10:57:00:09:18 inet addr:10.1.2.3 Bcast:10.255.255.255 Mask:255.0.0.0 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 eth1 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17314 errors:0 dropped:0 overruns:0 frame:0 TX packets:707 errors:0 dropped:0 overruns:0 carrier:0 collisions:11 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 EtherTalk Phase 2 addr:0/0 UP LOOPBACK RUNNING MTU:3924 Metric:1 RX packets:3259 errors:0 dropped:0 overruns:0 frame:0 TX packets:3259 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 --> what happend to eth0:2 ???