Comment 44 for bug 123773

Alex Wiechert (wiechert) wrote :

>This bug deals with virtual interfaces triggering a "SIOCSIFFLAGS: Cannot assign requested address" warning, while still succeeding, >and can be remedied by removing or patching the /etc/network/if-pre-up.d/wireless-tools file.

I can say that it is still not fixed with any of the above workarounds. On my servers there is no one of the virtual interfaces working.
I have no DHCP activated or wireless tool. I defenitly can not work with virtual IPAdresses.