I've done the following test today on two physical machines, so no
virtualization is involved.
How to reproduce:
What I have tried today: Installed Ubuntu 14.04 64bit (kernel
4.4.0.-38-generic) on two physical machines (no virtualization
involved). Upgraded them and installed radvd and isc-dhcp-server on one
of them (server). Then connected the two machines directly with a
network cable, no other infrastructure involved.
Server:
- Install Ubuntu 14.04 64bit (kernel 4.4.0.-38-generic)
- Apply all upgrades
- Disconnect the machine from the network
- Enable IPv6 forwarding in /etc/sysctl.conf, this is required by radvd
- Reboot
- Add IPv6 address fc00:0:0:1::1/64 (gateway) to eth0
- Configure radvd (/etc/radvd.conf):
interface eth0
{
AdvSendAdvert on;
AdvManagedFlag on;
prefix fec0:0:0:1::/64
{
AdvOnLink on;
AdvRouterAddr on;
AdvAutonomous off;
AdvValidLifetime 7200;
AdvPreferredLifetime 3600;
};
};
- Configure isc-dhcp-server6:
- In /etc/isc-dhcp-server6 set the INTERFACE to eth0
- Contents of /etc/dhcp/dhcpd6.conf:
authoritative;
ddns-update-style none;
option domain-name "domain";
option dhcp6.name-servers fec0:0:0:0::1;
option dhcp6.domain-search "domain.com";
default-lease-time 3600;
max-lease-time 3600;
shared-network lan {
subnet6 fec0:0:0:1::/64 {
range6 fec0:0:0:1::2 fec0:0:0:1::2;
}
}
- Start both radvd and isc-dhcp-server6 services, there should be no
errors in syslog.
Client:
- Install Ubuntu 14.04 64bit (kernel 4.4.0.-38-generic)
- Apply all upgrades
- Disconnect the machine from the network
- Connect the machine with a direct network cable (or through a desk switch) to
the server machine.
Expected behavior: IPv6 address fc00:0:0:1::2 is assigned to the client
Actual behavior: dhclient is sending solicit requests to the server, it
arrives to the network interface, then eaten by the kernel.
Additional information:
DHCPv6 server does not log anything and does not seem to receive the
packet in user space at all. According to netstat -g the dhcpd process
is correctly registered to broadcast group ff02::1:2 and according to
netstat -nlp it is listening on UDP6 port 547. Running dhcpd in the
foreground with strace confirms that the packet does not arrive to the
process. Same behavior was observed with latest Ubuntu 16.04 64bit.
** Summary changed:
- DHCPv6 does not work in Hyper-V
+ DHCPv6 does not work
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1624722
Title:
DHCPv6 does not work
Status in linux package in Ubuntu:
Confirmed
Bug description:
When using Ubuntu (in this case the live 16.04.1 LTS ISO) as a
Generation 2 (Gen1 untested) Hyper-V VM, an IPv6 address can't be
gotten through DHCPv6. dhclient continues to send out solicitations
but they never result in a response. I've looked on the router end
(running AdvancedTomato and dnsmasq) and the router is getting the
requests and is sending out a advertisement, but the VM never gets it.
Using the exact same live ISO works in VirtualBox so I've convinced it
is an issue with the Hyper-V network driver or something along those
lines.
The only IPv6 address that is configured automatically is the fe80
link-local address.
Windows VMs and older Linux VMs (Debian jessie with 3.16 kernel) work
just fine and receive an IPv6 via DHCPv6.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-31-generic 4.4.0-31.50
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CasperVersion: 1.376
CurrentDesktop: Unity
Date: Sat Sep 17 19:56:42 2016
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi
file=/cdrom/preseed/username.seed boot=casper quiet splash ---
RelatedPackageVersions:
linux-restricted-modules-4.4.0-31-generic N/A
linux-backports-modules-4.4.0-31-generic N/A
linux-firmware 1.157.2
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2012
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v1.0
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v1.0
dmi.chassis.asset.tag: 5808-9631-9266-5991-2472-7695-55
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0:
dmi.product.name: Virtual Machine
dmi.product.version: Hyper-V UEFI Release v1.0
dmi.sys.vendor: Microsoft Corporation
---
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CasperVersion: 1.376
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi
file=/cdrom/preseed/username.seed boot=casper quiet splash ---
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
RelatedPackageVersions:
linux-restricted-modules-4.4.0-31-generic N/A
linux-backports-modules-4.4.0-31-generic N/A
linux-firmware 1.157.2
RfKill:
Tags: xenial
Uname: Linux 4.4.0-31-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/26/2012
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v1.0
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v1.0
dmi.chassis.asset.tag: 5808-9631-9266-5991-2472-7695-55
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0:
dmi.product.name: Virtual Machine
dmi.product.version: Hyper-V UEFI Release v1.0
dmi.sys.vendor: Microsoft Corporation
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