I think I hit the bug #360155 with my /etc/network/interfaces configuration such as:
iface eth0 inet static address 192.168.1.2 netmask 255.255.255.0 iface eth0:1 inet static address 10.0.0.5 netmask 255.255.255.0 broadcast 10.0.0.255 network 10.0.0.0 gateway 10.0.0.254 iface eth0:1 inet6 static address 2001:7a8:b057::5 gateway 2001:7a8:b057::ffff netmask 64 and many other aliases with IPv6 addresses that I can switch on or off according my physical location. All the IPv6 addresses are associated to the main interfaces by ifup but unfortunately never removed by the respective ifdown. [EMAIL PROTECTED]:/tmp$ sudo ifup eth0 [EMAIL PROTECTED]:/tmp$ ifconfig -a eth0 Lien encap:Ethernet HWaddr 00:0F:1F:1E:4C:96 inet adr:192.168.1.2 Bcast:192.168.1.255 Masque:255.255.255.0 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 lg file transmission:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interruption:11 [EMAIL PROTECTED]:/tmp$ sudo ifup eth0:1 [EMAIL PROTECTED]:/tmp$ ifconfig -a eth0 Lien encap:Ethernet HWaddr 00:0F:1F:1E:4C:96 inet adr:192.168.1.2 Bcast:192.168.1.255 Masque:255.255.255.0 adr inet6: 2001:7a8:b057::5/64 Scope:Global 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 lg file transmission:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interruption:11 [EMAIL PROTECTED]:/tmp$ sudo ifdown eth0:1 SIOCSIFFLAGS: Cannot assign requested address [EMAIL PROTECTED]:/tmp$ ifconfig -a eth0 Lien encap:Ethernet HWaddr 00:0F:1F:1E:4C:96 inet adr:192.168.1.2 Bcast:192.168.1.255 Masque:255.255.255.0 adr inet6: 2001:7a8:b057::5/64 Scope:Global 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 lg file transmission:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interruption:11 In bug #360155, a patch has been proposed more than a year ago. If it works (I've not tested it), should it be possible to include it in the mainstream? It looks like it is related also to bugs bug #360155, #168776 and #395826. Thank you, -- Ronan KERYELL |\/ Tel: (+33|0) 2.29.00.14.15 Département Informatique |/) Fax: (+33|0) 2.29.00.12.82 ENST Bretagne, CS 83818 K GSM: (+33|0) 6.13.14.37.66 F-29238 PLOUZANÉ CEDEX 3 |\ E-mail: [EMAIL PROTECTED] FRANCE | \ http://enstb.org/~keryell sip:[EMAIL PROTECTED]