Jails and IPv6 local loopback

[Roger Leigh]

On 27/08/16 17:22, Roger Leigh wrote:
> Hi list,
>
> I saw
> https://lists.freebsd.org/pipermail/freebsd-jail/2011-March/001500.html
> in the archives but didn't see anything more recent.
>
> This is with 10.3-RELEASE
[...]

And after upgrade to 11.0-RC2:

bfcpp% ifconfig
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
 
options=c019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
         ether 38:ea:a7:ab:61:53
         inet 192.168.1.12 netmask 0xffffffff broadcast 192.168.1.12
         inet6 2001:8b0:860:ddbd:3aea:a7ff:feab:7002 prefixlen 128 vhid 3
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
bfcpp% ping -c1 localhost
PING localhost (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.061 ms

--- localhost ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.061/0.061/0.061/0.000 ms
bfcpp% ping6 -c1 localhost
PING6(56=40+8+8 bytes) 2001:8b0:860:ddbd:3aea:a7ff:feab:7002 --> ::1
ping6: sendmsg: Can't assign requested address
ping6: wrote localhost 16 chars, ret=-1

--- localhost ping6 statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss

> As you can see, inside the jail I have a working IPv4 loopback, but not
> a working IPv6 loopback.  Both work correctly on the host system.  This
> is inconsistent, and it's breaking stuff which needs the v6 loopback to
> be functional.
>
> Is this a case of a bad default, a misconfiguration or a bug in the
> loopback support for jails?

Note that 11.0-RC2 shows exactly the same behaviour.


Regards,
Roger