b10-dhcp6 doesn't not bind on Scope:Global inet6 address.

[Angelo Failla]

Hi,

I’m writing to report a problem with bind10-dhcp6 component.

It seems like b10-dhcp6 only binds to ff02::1:2 (the local dhcp multicast address) and the Link IPv6 address but *NOT* the Global one.

See output of `ifconfig eth0` on my machine:

$ ifconfig  eth0
eth0      Link encap:Ethernet  HWaddr 00:02:C9:DD:0D:5E
          inet addr:10.35.139.79  Bcast:10.35.139.255  Mask:255.255.255.0
          inet6 addr: fe80::202:c9ff:fedd:d5e/64 Scope:Link
          inet6 addr: 2401:db00:3011:b:face:0:3b:0/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:21598559 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18807156 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:27172706152 (25.3 GiB)  TX bytes:18380499794 (17.1 GiB)

Here you can see it’s not binding on 2401:db00:3011:b:face:0:3b:0/64 (Scope:Global) as it should:

$ sudo netstat -tunap | grep dhcp6
udp        0      0 ff02::1:2:547               :::*                                    31292/b10-dhcp6
udp        0      0 fe80::202:c9ff:fedd:d5e:547 :::*                                    31292/b10-dhcp6

The rack switches in our network are configured to relay dhcpv6 traffic to the DHCP servers in our network via their global IPv6 addresses.
Is this a known problem?
PS: I’m running a version of bind10 pulled from your git repo HEAD on the 11th of February 2014.

--
Angelo Failla
Site Reliability Operations Dublin
Pallotron at fb.com
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