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Windows 7: Alternate IP Address causing Domain connections to drop

12 Jan 2010   #11
Jeffs

Win 7 x64 Professional
 
 

Thanks.

I should also indicate that at the moment I have the alternate IP in place, was communicating with the control equipment on 0.x, and my connection to the "domain oriented" network resources on 10.x are currently up and working fine. So they DO co-exist, for a while anyway. I'm looking for what causes them to drop out, and why they stay disconnected until the instant I remove the alternate IP. The instant I click OK after deleting the alternate IP address all the resources reappear.

I need to figure this out, because I need to add more class C subnets on 25.x and 26.x to connect with other equipment.


My System SpecsSystem Spec
.
12 Jan 2010   #12
zzz2496

Windows7 Ultimate 64bit
 
 

Jeffs,

FQDN = Fully Qualified Domain Name, target them manually in your application(s), it will try to connect whatever the status of the resource reported by the "Browser" service. Example: Let's say the Domain uses "domain.local", and the Domain Controller is "controller.domain.local", if you want to access the Domain Controller, you should use "controller.domain.local"(\\controller.domain.local) or it's IP address (\\192.168.10.253 <-- just an example). If you are logged in, the resource will always authenticate you to the DC, even if you are temporarily "disconnected".

So let's say you want to access a file server in the domain with FQDN of "files.domain.local", you can either directly access it by "\\files.domain.local" or target it's IP address directly, example "\\192.168.1.200". The FQDN will work as long as your local DNS Server can "tell" you the IP address behind the FQDN.

zzz2496

Ps. the "\\" is the sign for Explorer, it means that you are accessing a SMB server, it has the same meaning as "smb://" in *nix family. If you only need "access", not "SMB Access", just use the FQDN, no need to add "\\".
My System SpecsSystem Spec
12 Jan 2010   #13
RedBirdDad

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

When you added the alternate addresses, did you put in a default gateway address as well? I've used the alternate address stuff as well. Going back to W2K like you have.

While I haven't tried it on W7 yet, one thing that used to get me into trouble is having more than one default gateway. Adding more than one will get windows all confused. As long as you have *one* default gateway (in this case your domain) it should know which is which.

Just my 2 cents.
My System SpecsSystem Spec
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12 Jan 2010   #14
dmex

 

Quote   Quote: Originally Posted by Jeffs View Post
Thanks.

I should also indicate that at the moment I have the alternate IP in place, was communicating with the control equipment on 0.x, and my connection to the "domain oriented" network resources on 10.x are currently up and working fine. So they DO co-exist, for a while anyway. I'm looking for what causes them to drop out, and why they stay disconnected until the instant I remove the alternate IP. The instant I click OK after deleting the alternate IP address all the resources reappear.

I need to figure this out, because I need to add more class C subnets on 25.x and 26.x to connect with other equipment.
Ive had that situation quite a few times when I updated my LAN controller using Windows Update, The RTL8168C driver showing as an available driver update for my LAN controller is in fact the wrong driver and will cause exactly the symptoms you described, where it will work with one or both networks for a period of time before mysteriously disconnecting and then your having to remove the configuration for the adapter before it'll work correctly.

If the RollBack driver option is available on the driver properties in Device Manager for your LAN controller then roll it back and see if it continues to happen, I would also try another machine to see if it has the same difficulties and also look around for a different version of your Vista/Windows 7 Ethernet drivers.

You should know by now that hardware related things either work or they don't on Windows, so the fact your LAN controller works perfectly before suddenly failing indicates a driver or hardware problem (unless you have some network script or co-worker giving you grief :P)

Hope it helps.

Steven
My System SpecsSystem Spec
12 Jan 2010   #15
zzz2496

Windows7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by RedBirdDad View Post
When you added the alternate addresses, did you put in a default gateway address as well? I've used the alternate address stuff as well. Going back to W2K like you have.

While I haven't tried it on W7 yet, one thing that used to get me into trouble is having more than one default gateway. Adding more than one will get windows all confused. As long as you have *one* default gateway (in this case your domain) it should know which is which.

Just my 2 cents.
From what Jeffs said, I think he doesn't use 2 gateways, he just added a new alternate IP address. Having 2 gateways does indeed make Windows go weird at times, but it can be cured by putting a number in the "Interface metric" text box in the advanced properties. It simply saying that this gateway is farther than that gateway, so Windows will automatically use the shorter distance gateway. By the way, I'm currently using 3 different IP addresses for my current computer, one for IBM IMM interface, one for my VMM connecting to my IBM server, and the last one is for connecting to the virtual servers inside the IBM, nothing wrong so far (I only access FQDNs/IP addresses here).

zzz2496
My System SpecsSystem Spec
12 Jan 2010   #16
RedBirdDad

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

You could be right. I couldn't tell from his posts if he added a gateway or not.
My System SpecsSystem Spec
12 Jan 2010   #17
Jeffs

Win 7 x64 Professional
 
 

To answer some questions:

- only 1 gateway. The gateway is only used to route traffic out to the internet, not the internal network or anything having to do with the devices/resources that drop out. As I've said, when these resources drop out, internet connectivity still works.

- zzz2496: are you talking about putting FQDN entries in my hosts file? If not, ....?

- dmex: I'll check if the driver's been updated.

When I left work, the alternate IP address was in place. When I get to work in the morning, I'll see if I still have the resources showing.
My System SpecsSystem Spec
12 Jan 2010   #18
zzz2496

Windows7 Ultimate 64bit
 
 

Jeffs,

If the DHCP server is serving a DNS server, you don't need to put the FQDN in your HOSTS file, the DNS server will resolve hostname to IP address for you. What I mean was, you access the resource directly, ignore the network browser report (the page you refer to see network resources). That list will come and go, it relies to the network browser service's ability to discover "things". In an Active Directory situation, the network browser should connect to the DC to find out resources, but I can be wrong since the "network browser" I know is from XP days.

zzz2496
My System SpecsSystem Spec
12 Jan 2010   #19
Jeffs

Win 7 x64 Professional
 
 

We don't use DHCP. All addresses are static.

...more tomorrow
My System SpecsSystem Spec
13 Jan 2010   #20
Jeffs

Win 7 x64 Professional
 
 

For whatever reason, I still have connectivity to my network resources 10.x and to my equipment on 0.x. The alternate IP has been set for over 12 hours. I don't know why it's still working. Sooner or later however, it's gonna quit.
My System SpecsSystem Spec
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 Alternate IP Address causing Domain connections to drop




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