DHCPv6 Behaviour in Windows Vista

DHCPv6 Stateless and Stateful Server in Longhorn Server

Microsoft Windows DHCP Team Blog — Sat, 27 Jan 2007 02:40:35 GMT

In Windows Server codenamed "Longhorn", Microsoft has introduced DHCPv6 functionality to the DHCP server.

Nova funcionalidade DHCPv6 Stateful no Longhorn Server BETA 3.

Blog do Anderson Thiago — Sun, 28 Jan 2007 19:17:17 GMT

Beta Tester's do LH Server BETA 2 já estão fazendo uso do DHCPv6 Stateless que foi projetado para se

DHCPv6 Prefix Delegation in Windows Vista

Microsoft Windows DHCP Team Blog — Sat, 10 Feb 2007 04:18:44 GMT

In one of my previous posts, I had discussed details about the DHCPv6 client behaviour in Windows Vista

re: DHCPv6 Behaviour in Windows Vista

Steve Decker — Wed, 13 Jun 2007 23:28:35 GMT

All,

We are currently testing with Longhorn Beta 3 and Vista Business. We are attempting to setup DCHPv6 only with Longhorn. I have set the following M & O Flags on the Vista Client using the netsh commands, but still have yet to get my Vista client to get a IPv6 address.

Is there something I am missing either on the Server or client side that I have not setup. What would be the basic steps for this configuration to work?

re: DHCPv6 Behaviour in Windows Vista

Filipino Ako — Mon, 02 Jul 2007 11:01:30 GMT

I hope this is the right site to post this question.

Is it a normal behavior of Windows Vista not to release the IPv6 address when it is Restarted or during Shutdown?

re: DHCPv6 Behaviour in Windows Vista

Chetan — Thu, 30 Aug 2007 16:42:15 GMT

Hi Steve

We are also facing the same issues as your, like to know if you have over come the same. if yes can you please let us know the steps to resolve.

re: DHCPv6 Behaviour in Windows Vista

Jim Thompson — Wed, 17 Oct 2007 05:16:16 GMT

In what context of netsh do you set the M and O flags for the DHCPv6 Client (Vista)? Also how does one calculate the IPv6 DGW address of the subnet? Are there any How-to's on setting up DHCPv6 on Longhorn? I just got my test lab DC back up on the new RC0 drop this week and would like to see my Vista WS grab an IPv6 address off the DC.

re: DHCPv6 Behaviour in Windows Vista

Jim Thompson — Wed, 17 Oct 2007 05:26:23 GMT

re: DHCPv6 Behaviour in Windows Vista

Radha Yerramilli — Wed, 13 Feb 2008 02:44:41 GMT

How do I configure my Windows Vista machine to acquire a ipv6 address from a DHCPv6 server? Ay special configuration needed ?

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Wed, 13 Feb 2008 08:19:40 GMT

Hey radha,

Try the following on your vista machine.

In NetShell go to the interface ipv6 prompt,

netsh interface ipv6 > set interface <interface number> advertise=enabled manageAddress=enabled .

Here <interface number> is the name or id of the interface where you want to acquire IP address.

Please let me know if you still fave any problem.

re: DHCPv6 Behaviour in Windows Vista

Radha Yerramilli — Thu, 14 Feb 2008 21:43:19 GMT

Appreciate your response. Not sure what is happenening but I am unable to configure that command. I have a interface named 'ipv6'. So at the prompt I tried giving

set interface "ipv6" advertise=enabled managedAddress=enabled

I get a error 'element not found'

I tried all the combinations I could think of (with double quotes, no quotes, =) Nothing seems to help.

Is there some place I can look up the configs and the steps needed to setup a Vista dhcpv6 client

Just for some background. I am trying to do some interoperability testing between a Vista dhcpv6 client and a Cisco dhcpv6 server. Connected the 2 machines directly. The connection works fine as I was able to get a v4 address for the vista from the router. But v6 vista client doesn't seem to send a SOLICIT

re: DHCPv6 Behaviour in Windows Vista

Geof Cooper — Tue, 26 Feb 2008 05:29:17 GMT

I have managed to get Vista to do DHCP requests (Set M/O bits on in the RADV). I have a Windows Server 2008 eval, build 6001.

I see DHCPv6 solicit messages from the vista machine to ff02::1:2, but I don't see any responses. The ws2k8 DHCP server shows that it is running.

Any debugging tips?

- g

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 26 Feb 2008 07:55:09 GMT

What scopes have you configured at the server side?

Do you see the Solicit packet on the server side?

re: DHCPv6 Behaviour in Windows Vista

Geof Cooper — Tue, 26 Feb 2008 22:08:58 GMT

I see DHCPv6 solicit messages from vista.linklocal(8e16) to ff02::1:2, AND from server2k8.ll(8ced) to ff02::1:2.

I don't see any unicast traffic, and only solicit messages.

I have one scope in IPv4 (which works) and one scope in IPv6. The IPv6 scope covers the full 64 bits, based on the subnet prefix.

-g

re: DHCPv6 Behaviour in Windows Vista

Geof Cooper — Tue, 26 Feb 2008 22:53:55 GMT

I got it working. Turns out that I had a dynamically assigned IPv6 address.

I had tried to make it static. I'm guessing that if you take the dynamically assigned address and set it as a static address, that somehow the system doesn't register this as a static address. At least this is what seemed to happen to me. Perhaps you can't configure a globally significant host number as a static IPv6 address?

When I set the static address to be prefix::200, it took and DHCPv6 started to work.

It would be nice if DHCPv6 had some kind of signal in the UI or logs that indicated this.

Thanks for your help.

-g

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Wed, 27 Feb 2008 07:38:59 GMT

Hey Geof,

You can check in the UI whether the server is bound to any static IPv6 address or not by right clicking on the server node and Add/Remove Bindings.

re: DHCPv6 Behaviour in Windows Vista

Rasika — Thu, 22 May 2008 08:28:52 GMT

I configured my Windows Vista machine to acquire a ipv6 address from a DHCPv6 server.

Tried the following on my vista machine.

In NetShell went to the interface ipv6 prompt,

netsh interface ipv6 > set interface "Local area connection" advertise=enabled manageAddress=enabled .

but i got an message as bellow.

"the requested operation requires elevation"

Please reply me sooner possible.

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 27 May 2008 22:05:02 GMT

Hey Rasika,

You need to run command prompt as an administrator. First he logged on user must have administrator priviledges. Then right click on the command prompt icon and select run as administrator.

Thanks

Raunak Pandya

DHCP Server Team

re: DHCPv6 Behaviour in Windows Vista

aarontan — Mon, 02 Jun 2008 22:46:05 GMT

I am running server 2008 DHCP and have been able to issue IPV6 addresses to Vista Clients. When I run IPconfig on the Vista Client the issued IPV6 appears and the address also appears in server 2008 in the DHCPV6 address leases. However I am unable to connect from the Vista client with the DHCPV6 ip address. What is strange is when I configure a static IPV6 address on that same Vista Client I can now use the DHCPV6 IP address. Any ideas?

Aaron

How can ipv6 address using dhcpv6 can be released in Vista?

Chander — Thu, 05 Jun 2008 23:24:25 GMT

Hi,

My vista dhcpv6 client is able to get ipv6 address. Is there a command with which I can release or renew ipv6 address?

Thanks,

Chander

re: DHCPv6 Behaviour in Windows Vista

mayurn — Fri, 06 Jun 2008 11:25:13 GMT

ipconfig /release6 [<interface>]

ipconfig /renew6 [<interface>]

re: DHCPv6 Behaviour in Windows 2008 Server

Raghug — Tue, 24 Jun 2008 14:32:28 GMT

Iam working for Cisco Banglore as a Tester.Presently working on DHCPv6 Relay.As part of that Iam trying Windows 2008 server build 6001 with SP1.

Iam using DHCPv6 client as Vista PC & also tried with IXIA.

Iam able to see the SOLICIT messages received on the Windows 2008 Server but i do not see any response from the DHCPv6 Server.

I tried with other DHCPv6 Server like dibbler.Everything is working fine.& vista is able to get the ipv6 address.

iam using only one scope with 1000::/64 prefix in Stateful mode.

Can anybody help.

G.Raghu

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 24 Jun 2008 16:52:48 GMT

On the server, check

1. you have set the bindings for the interface on which you want to serve v6 addresses and whether this matches the configured scope.

2. If the packet is coming via Relay then check if the link-address field and the scope address match.

You can check scope and bindings using netsh/mmc.

netsh dhcp server v6 show scope

netsh dhcp server v6 show bindings

re: DHCPv6 Behaviour in Windows Vista

Raghug — Wed, 25 Jun 2008 13:37:07 GMT

Thanks for your comments.

This time i configured the IPV6 Scope and address in the same range.

Server address 1000:1000::99/64

Scope:1000:1000::/64

Now i see that Server is replying with an ADVERTISE message for the SOLICIT message from VISTA,but there is no REQUEST message coming from VISTA client.

If i replace VISTA with IXIA as DHCPv6 Clients,there is no response from DHCPv6(Windows 2008 Server) server.

Is there any other thing that i need to enable on SERVER.

Also is there any interoperability issue with IXIA.

Please help.Thanks

G.Raghu

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Fri, 25 Jul 2008 07:51:08 GMT

Hi Raghu,

After replacing with Vista client with IXIA, Could you collect the packet capture at client end as well as at the server end.

This will help us to nail down the issue.

Thanks,

Manu

re: DHCPv6 Behaviour in Windows Vista

hamajun2.0 — Thu, 23 Oct 2008 21:33:17 GMT

Hello Team,

Could you confirm the issue reported as MS Connect ID 45620 violates RFC 3646, thus this is a bug of Windows Server 2008?

http://connect.microsoft.com/WindowsServerFeedback/feedback/ViewFeedback.aspx?FeedbackID=345620

Regards,

Junichiro Hamaguchi

re: DHCPv6 Behaviour in Windows Vista

Ravi Kumar [MSFT] — Sun, 02 Nov 2008 15:12:27 GMT

This is a bug in Windows 2008 Dhcpv6 Server. The QFE for this issue is in progress and would be released soon.

Ravi

DHCPv6 Behaviour in Windows XP

mukeshkb — Fri, 19 Dec 2008 13:06:47 GMT

I have a Router (a Linux PC say R-1) which has radvd configured with bit M and O set. (AdvManagedFlag on and AdvOtherConfigFlag on)

and dhcp6s is also running here.

I have installed ipv6 on my PC (say PC-2) (Windows XP professional 5.1.2600). I see successful stateless configuration of IPv6 on PC-2(by router adv.) But I don't see successful it sending any DHCPv6 messages on wireshark. even after excuting any of following command

- ipv6 renew ifIndex

- netsh interface ipv6 set interface ifIndex managedaddress=enabled advertise=enabled

re: DHCPv6 Behaviour in Windows Vista

mukeshkb — Fri, 19 Dec 2008 13:09:45 GMT

I have a Router (a Linux PC say R-1) which has radvd configured with bit M and O set. (AdvManagedFlag on and AdvOtherConfigFlag on)

and dhcp6s is also running here.

I have installed ipv6 on my PC (say PC-2) (Windows XP professional 5.1.2600). I see successful stateless configuration of IPv6 on PC-2(by router adv.) But I don't see successful stateful configuration (by dhcpv6)also it is not sending any DHCPv6 messages (no dhcpv6 appears on wireshark). even after excuting any of following command

- ipv6 renew ifIndex

- netsh interface ipv6 set interface ifIndex managedaddress=enabled advertise=enabled

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Sat, 20 Dec 2008 22:45:01 GMT

Hi Mukeshkb

The issue seems to be Linux router configuration rather than with Windows Dhcp clients, as the same problem is seen with Windows XP and Vista clients.

Are the firewall exceptions added for Dhcpv6 in Linux Server ? If not please add them.

Also, Is the packet sniff taken on Client or Server? Please check if Dhcpv6 packets are being sent by client, when packets are being captured on client machine.

Ravi

DHCPv6 DUID scheme for Windows 2008 server

Yong Ni — Fri, 13 Mar 2009 04:20:43 GMT

Hi,

I am trying to do stateful DHCPv6 with Windows 2008 server being a DHCP client. I need to pre-configure the Windows Server's fixed IP address on the DHCP server before bringing up windows. In case of v4, I can assign IP address based on MAC address. For DHCPv6, I would use DUID. However, it seems that windows 2008 use DUID-LLT which cannot be predetermined. Any suggestion how to make IPv6 address assignment work in such case? Is it possible to do DUID-LL instead?

The use case is that I do one windows 2008 installation and create a disk image. The image will then be replicated to other server all running the same software but using different IP.

Thanks,

Yong

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Fri, 13 Mar 2009 11:09:39 GMT

hi Yong,

The DUID generated will be unique anyways. Why do you want to predetrmine it and then assign IP address?

It is not possible to do DUID-LL in Windows DHCPv6 client.

re: DHCPv6 Behaviour in Windows Vista

Yong Ni — Fri, 13 Mar 2009 20:49:48 GMT

Thanks for replying.

We need to predetermine the DUID for IP address assignment because we need to create multiple clones of windows 2008 server, all from the same disk image, ship them to customers, let network admin configure IP address on DHCPv6 server, and plug-in the 2008 server.

At customer's site, with DUID on hand, admin will configure the IPv6 address for windows 2008 on their DHCPv6 server, and then plug-in the cloned windows 2008 server. They may not have technical people on-site to bring up the server and do "ipconfig /all" to find DUID. In some case, there may not even have a console attached to the server. Hence, we need to make the depolyment plug-and-play and maintain a "black box" approach for IP address assignment.

Do this make sense? BTW, when DUID determined? First boot up, first enablment of an IPv6 interface (if disabled by default), or upon receiving of the first IPv6 Router Advertisement with M bit set?

thanks,

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 17 Mar 2009 12:44:38 GMT

DUID is determined the first time any interface is connected or enabled on the machine. This DUID is persistent throughtout then.

There is no way to to predetermin ethe DUID. One will either have to read registry key for that purpose or know it through "ipconfig /all".

re: DHCPv6 Behaviour in Windows Vista

linus — Tue, 17 Mar 2009 14:04:18 GMT

Hello Team,

Does Vista DHCPv6 client support the "Reconfigure" option?

And how about Windows server 2008?

Thanks.

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 17 Mar 2009 15:17:49 GMT

Vista DHCPv6 client as well as Windows server 2008 does not support Reconfigure option.

Thanks

teamdhcp

re: DHCPv6 Behaviour in Windows Vista

Tamás — Tue, 31 Mar 2009 13:10:38 GMT

Hello Team,

is there any way to know the actual DUID of Vista? (I can't find with ipconfig /all command...)

I see it in the router debug, but I can't see in the wireshark capture.

Thanks

Tamás

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 31 Mar 2009 13:29:02 GMT

The Duid is present in following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\Dhcpv6DUID.

By the way in which captures are you seeing for "DUID". All Dhcpv6 packets transmitted by client would have Duid in "ClientID" option.

Thanks

teamdhcp

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Thu, 02 Apr 2009 17:13:40 GMT

DUID is generated only once for a machine. It is global across all adapters. In Vista, Duid is generated on the first adapter connect. It is persistent after that.

Windows DHCPv6 server does not respond to relayed messages

mii — Tue, 12 May 2009 12:34:40 GMT

Hello team,

Is there any specific configuration for Windows 2008 DHCPv6 server to respond to relayed requests ?

I have 2 networks connected with cisco sw. There are Windows 2008 DHCPv6 server and Vista PC on the each side. Cisco relays DHCPv6 messages to/from the server.

Windows 2008 server is configured as stateless dhcpv6 server to provide dns servers and domain information. It does not have any ipv6 scopes.

When the vista is connected to the network, the server receives relayed "information-request" message (at least captures on the server). However, the server does not respond.

If the vista and server is on the same segment, vista can be configured perfectly.

Thank you,

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 12 May 2009 12:54:34 GMT

There is no configuration required on the DHCP Server in environments where we have DHCP relays.

What are the DHCP options being added by the Cisco Relays ?

re: DHCPv6 Behaviour in Windows Vista

mii — Tue, 12 May 2009 13:26:47 GMT

Thanks for replying,

The original message from vista pc, contains Elapsed-Time(8)/Client-Identifier(1)/Vendor-Class(16)/Option-Request(6) options, are encapsulated in Relay-Message(9) option.

Plus, Interface-Identifier(18) and Remote-Identifier(37) options are added by cisco relay.

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 12 May 2009 13:30:42 GMT

The Windows DHCP server does NOT listen to the Link Local address of the link.

The DHCP server only listens to the bound global unicast address and the DHCP Server related multicast addresses in the links.

Can you verify if the DHCP server IP address configured in the relay agent is the Global address which the DHCP server is bound to?

If yes, Can you send the packet(s) capture from the relay agent to the server?

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Tue, 12 May 2009 13:35:51 GMT

So the DHCPv6 Server in WS08 does not identify Remote-Identifier(37) option, and hence it is dropping the packet. The issue is resolved in WS08 R2. Please try to disable the Cisco Relay from sending the remote-id option.

re: DHCPv6 Behaviour in Windows Vista

JohnG — Fri, 31 Jul 2009 13:41:30 GMT

We have discovered a number of Vista machines with Identical DUIDs. Presumably they are the result of some sort of cloning/imaging.

How can we change the DUID on these machines? Can we simply delete the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\Dhcpv6DUID value?

re: DHCPv6 Behaviour in Windows Vista

teamdhcp — Fri, 31 Jul 2009 14:05:04 GMT

Since DHCP client uses Windows LLT-DUID, In order to change the DUID, deleting it will help. New DUID will be generated when any media is connected or enabled after that on the machine.