This sounds like exactly the behaviour that I explained in 2013 here: https://askubuntu.com/a/332421/7808
ifconfig still exists but is deprecated and no longer shipped by default. Users should use its replacement "ip" instead. However it is true that ifconfig does not display the additional aliases set by ifupdown, so the bug remains valid. But since ifconfig is deprecated we don't expect this to ever be addressed, so I'm setting the bug status to Won't Fix. ** Changed in: net-tools (Ubuntu) Status: Expired => Won't Fix -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to net-tools in Ubuntu. https://bugs.launchpad.net/bugs/878333 Title: ifconfig not showing virtual ip addresses Status in net-tools package in Ubuntu: Won't Fix Bug description: After upgrading to 11.10 my virtual ip addresses do not show up in an ifconfig (-a). Furthermore the eth0:1 address seems to be used for eth0 itself, and the DHCP assigned address (10.8.100.81) is seen as secondary address for eth0? ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: net-tools 1.60-23ubuntu3 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 1.23-0ubuntu3 Architecture: amd64 Date: Wed Oct 19 18:30:37 2011 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) SourcePackage: net-tools UpgradeStatus: Upgraded to oneiric on 2011-10-14 (5 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/net-tools/+bug/878333/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp