[Pkg-libvirt-maintainers] Bug#616314: libvirt: Libvirt disables IPv6 on virtual network bridges

[Ralf Spenneberg]

Package: libvirt-bin
Version: 0.8.3-5
Severity: important
File: libvirt
Tags: ipv6

Libvirt supports the creation of virtual networks via virsh or virt-manager.
These virtual networks are implemented as a bridge using the bridge-utilities.
IPv6 is disabled by default on these bridges and the usage of IPv6 addresses
 on the virbrX devices is impossible:

# cat /proc/sys/net/ipv6/conf/virbr1/disable_ipv6 
1
# ip addr add 2001:dead:beef::1/64 dev virbr1
RTNETLINK answers: Permission denied

IPv6 should not be disabled. Then IPv6 addresses may be used:
# echo 0 > /proc/sys/net/ipv6/conf/virbr1/disable_ipv6
# ip addr add 2001:dead:beef::1/64 dev virbr1

Currently IPv6 cannot be used with virtual networks and KVM, QEMU or XEN on 
Debian systems. There is no switch to enable IPv6 by default.


-- System Information:
Debian Release: 6.0
  APT prefers squeeze-updates
  APT policy: (500, 'squeeze-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libvirt-bin depends on:
ii  adduser                3.112+nmu2        add and remove users and groups
ii  libavahi-client3       0.6.27-2+squeeze1 Avahi client library
ii  libavahi-common3       0.6.27-2+squeeze1 Avahi common library
ii  libblkid1              2.17.2-9          block device id library
ii  libc6                  2.11.2-10         Embedded GNU C Library: Shared lib
ii  libcap-ng0             0.6.4-1           An alternate posix capabilities li
ii  libdevmapper1.02.1     2:1.02.48-5       The Linux Kernel Device Mapper use
ii  libgcrypt11            1.4.5-2           LGPL Crypto library - runtime libr
ii  libgnutls26            2.8.6-1           the GNU TLS library - runtime libr
ii  libnl1                 1.1-6             library for dealing with netlink s
ii  libparted0debian1      2.3-5             The GNU Parted disk partitioning s
ii  libpciaccess0          0.12.0-1          Generic PCI access library for X
ii  libreadline6           6.1-3             GNU readline and history libraries
ii  libsasl2-2             2.1.23.dfsg1-7    Cyrus SASL - authentication abstra
ii  libudev0               164-3             libudev shared library
ii  libuuid1               2.17.2-9          Universally Unique ID library
ii  libvirt0               0.8.3-5           library for interfacing with diffe
ii  libxenstore3.0         4.0.1-2           Xenstore communications library fo
ii  libxml2                2.7.8.dfsg-2      GNOME XML library
ii  logrotate              3.7.8-6           Log rotation utility

Versions of packages libvirt-bin recommends:
ii  bridge-utils              1.4-5          Utilities for configuring the Linu
ii  dnsmasq-base              2.55-2         A small caching DNS proxy and DHCP
ii  ebtables                  2.0.9.2-2      Ethernet bridge frame table admini
ii  gawk                      1:3.1.7.dfsg-5 GNU awk, a pattern scanning and pr
ii  iptables                  1.4.8-3        administration tools for packet fi
ii  libxml2-utils             2.7.8.dfsg-2   XML utilities
ii  netcat-openbsd            1.89-4         TCP/IP swiss army knife
ii  qemu                      0.12.5+dfsg-3  fast processor emulator
ii  qemu-kvm                  0.12.5+dfsg-5  Full virtualization on x86 hardwar

Versions of packages libvirt-bin suggests:
ii  policykit-1                   0.96-4     framework for managing administrat

-- no debconf information