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Hyper V - Guest Help !

Hi,

I have setup hyper V in Windows 2008 r2 and installed Hyper V

I have then installed 2008 r2 as a Guest etc.

I have disabled both firewalls but i cant acess the guest from the host and vice versa.

The Host has full internet access etc and is working fine.

The Machine has 2 Nics.

192.168.1.200 - Main Nic

Second Nic is set for External VM Nic

I have setup a static IP on Host Windows install of 192.168.1.201

Is this something simple i am missing ? I need both machines to be able to see each other and also my main router which is 192.168.1.254 as both access outside world and also inbound etc.

Any help would be greatly appreciated
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JonathanJns
Asked:
JonathanJns
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1 Solution
 
Gerald26Commented:
Please check NIC2 --> Used for the hyperv switch "Extrenal VM"

In the HYPERV network configuration of External VM, uncheck "allow Management operating system to share this network". This will remove TCPIP Protocol bound on this interface.

tell me if your hosted machine can ping your host machine
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JonathanJnsAuthor Commented:
No it still the same seems very strange

In virtual network manager It has

Virtual switch in notes

External and mapped to second LAN port
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Gerald26Commented:
Then the configuration is correct.
Of course both nics and are connected on a real switch and there is no VLAN configuration on these ports ?

Can the Hosted machine reach the firewall as well ? Can it ping other network ressources ?
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JonathanJnsAuthor Commented:
That's correct it's a dell server with dual nic.
Both ports are Into the switch.

I can ping the firewall no prob but it will def not go back to host etc

There is no v LAN etc

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Gerald26Commented:
Ok,
Can you type ARP -A in a dos prompt on the Hosted Machin and check if it has a line for 192.168.1.200 with the valid mac address ?

If so, it will still be a firewall problem. In this case I'd like to come back on this comment :
I have disabled both firewalls
Have you disabled the service itself or is the service running but all traffic is allowed ?

If service is disabled, enable it again and start it. On HOST machine type in a Dos prompt :

netsh advfirewall set domainprofile state off
netsh advfirewall set privateprofile state off

(new version of netsh firewall set opmode mode=disable profile=all)

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JonathanJnsAuthor Commented:
Just a quick one, I can ping the guest from host via ip and name but not other way round
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Gerald26Commented:
Did this suddently happen after you used the netsh commands or is it just working now for no specific reason ?
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JonathanJnsAuthor Commented:
Just working,

In my network settings on host it lists

Connection 1 - local 192.168.1.200
Connection 2 - virtual
Connection 3 - showing disconnected

Is this right ?
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Gerald26Commented:
Yes, I have this kind of configuration with several dedicated & teamed NICs on most installations and got no problem reaching host and vm.
If you have a  1 way PING working, I'm pretty 95% sure it's a firewall issue.

5% left include bad netmask on a machine, other security software and maybe something we missed...

Just a quick one, I can ping the guest from host via ip and name but not other way round

What is the ping error message output ?
Can the hosted VM  browse files on the host even tho ping isnt working ?
Can you do same test with remote desktop from VM to host (must be activated on Host remote access configuration) ?
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JonathanJnsAuthor Commented:
i really appreciate the help, would you be able to do a teamviewer session and have a quick look, it may be something so simple im missing
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Gerald26Commented:
If this is a new installation not in production it's ok, give me a session number /password and I'll join and try to have a quick look
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JonathanJnsAuthor Commented:
Ive just managed to get it pinging both way by putting a static ip on the other net adapter but its now shows that as the virtual ip not the proper one, the internet doesnt come up on host either.

The team viewer id is : 968 308 239  pin 3378

Thanks
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Gerald26Commented:
ok 1st connection successful, after network modifications & reset  I need a new ID to connect again
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Gerald26Commented:
This is really strange.
Nic 1 is configured for Host access on 192.168.1.0/24 network
Nic 2 is bound to an external hyperv switch with no OS sharing
VM and Host can reach gateway on the network

VM can not request HOST mac address, so it can not ping it
Host can not request VM mac address so it can not ping it either.

I can add that the server is using broadcom drivers and utility on a Dell server.
If anyone has some ideas to share...
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JonathanJnsAuthor Commented:
removed the broadcom software and it still does the same thing, back to the drawing board !

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Gerald26Commented:
Got 30 minutes left, give me another ID, i dont want to leave on a failure :p
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JonathanJnsAuthor Commented:
Sorry only now reloaded EE,

if not too late

ID :  968 496 742

Pin : 4805
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Gerald26Commented:
Sorry I wasn't more helpful.
note: remember to uncheck mac spoofing in VM network settings
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JonathanJnsAuthor Commented:
Hi,

Logged with MS they confused aswell, i then logged with Dell today and its a hardware fault !

the second nic is not giving a mac address app off the mboard so that is casing the issue !

New MB on thursday so will see then :)

J
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Gerald26Commented:
Yeepee ! That was turning me crazy all the week end :)
Tell us when you receive the new main board
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RadweldCommented:
This is a well known issue with broadcom nics you have to disable offloading (tcpchinmey) to get this to work, I'm on a phone so can't send you the link but will post the netsh command later
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Gerald26Commented:
We tried that, when i got remote access on the server i've disabled teaming tool, uninstalled it, and disabled large send offload and checksum offload on interfaces.
Same problem
I used broadcom drivers to do it on the hardware, didnt use netsh command (netsh int ip set chimney disable). That might be worth trying in case new mainboard doesnt solve the problem

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JonathanJnsAuthor Commented:
Hi,

All sorted it was the DELL Motherboard, it only had one mac address !

Thanks for the help
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JonathanJnsAuthor Commented:
Bloody motherboard
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