Bug#736336: Adding an IPv6 address to a bridge from /etc/network/interfaces removes the link-local address

[Matthew King]

Package: bridge-utils
Version: 1.5-7

ifupdown version 0.7.47.2
iproute2 version 3.12.0-1
arch is amd64

Creating the bridge manually is fine:

root:~# brctl addbr bar
root:~# ifconfig bar up
root:~# ip ad add XXX:abcd::1/64 dev bar
root:~# ifconfig bar
bar       Link encap:Ethernet  HWaddr 2e:81:78:aa:c7:a9
          inet6 addr: XXX:abcd::1/64 Scope:Global
          inet6 addr: fe80::2c81:78ff:feaa:c7a9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:946 (946.0 B)

But from the interfaces file is not:

root:~# cat /etc/network/interfaces
...
iface bar inet6 static
  address XXX:abcd::1
  netmask 64
  dad-attempts 0
  bridge_ports none
root:~# ifup bar

Waiting for bar to get ready (MAXWAIT is 32 seconds).
root:~# ifconfig bar
bar       Link encap:Ethernet  HWaddr b6:79:72:af:26:fc
          inet6 addr: XXX:abcd::1/64 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 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Matthew