Public bug reported:
Binary package hint: ifupdown
This is very similar to Bug #123773, but is specific to IPv6 and should
probably be tracked separately.
I don't have an instance ready to retest on, but this apparently worked
on Jaunty (9.04) and broke on Karmic (9.10). I'm actually re-using the
"/etc/network/interfaces" file that I used successfully under Jaunty
before upgrading to Karmic.
Per the IFCONFIG(8) man page, I'm attempting to define an IP alias in
/etc/network/interfaces:
auto eth0
iface eth0 inet static
address 192.168.1.1
netmask 255.255.255.0
auto eth0:0
iface eth0:0 inet6 static
address 2001:db8::1
netmask 64
(2001:db8::1 is only an example address.)
Attempting to perform an "ifup eth0:0" results in:
SIOCSIFFLAGS: Cannot assign requested address
Failed to bring up eth0:0.
Unlike Bug #123773, this is not coming from the wireless-tools or other
event scripts, as disabling them does not change the result.
The following command is a work-around, and works as a post-up command in
/etc/network/interfaces:
ip addr add 2001:db8::1/64 dev eth0
Defining an IPv4 alias also works correctly using either the alias
stanza or the "ip addr add" command.
uname: Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009
x86_64 GNU/Linux
ifupdown package version is 0.6.8ubuntu21
** Affects: ifupdown (Ubuntu)
Importance: Undecided
Status: New
** Tags: ipv6 network
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'SIOCSIFFLAGS: Cannot assign requested address' when setting up IPv6 alias
https://bugs.launchpad.net/bugs/508996
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