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subnets and domain

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11 replies

by geno

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I have the following:
lan1-> router <-T1-> router -> lan2
subnet for lan1 is XXX.XXX.XX1 subnet for lan2 is XXX.XXX.XX2 mask for lan1 255.255.255.0 for lan2 255.255.255.128 PDC & WINS is on LAN1. both are part of same domain. workstations on LAN1 can access shares on LAN1 and LAN2 but workstations on LAN2 can only access shares on LAN1 and not LAN2. Any ideas how I can fix this?

11 replies

by nschulz

You are saying that workstations on LAN2 cannot access shares on the local subnet.

The only network traffic that would go accross the router to connect to a local share is the PDC authentication.

Make sure the PCs on LAN2 have a WINS entry. I think you also need to add the PDC into the LMHOSTS file on the systems on LAN2.

Thanks Norm

by geno

I have entries in the LMHOSTS files for the domain controller and I've checked the database to make sure that the PCs on LAN2 are showing up. All the workstations are WIN2k and the server is NT if that makes helps.

by dao251

From your description one can conclude address masks in your subnets are wrong. However, this case nothing would work.

would you please post here output of "ipconfig /all" from workstations of your both subnets.

Dima

by geno

LAN1 Workstation
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : COMP_IT
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . .. : No
DNS Suffix Search List. . . . . . : RXL.XTVZ.com

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com 3C920 Integrated Fast Ethernet Controller (3C905C-TX Compatible)
Physical Address. . . . . . . . . : 00-06-5B-5F-0E-4E
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 166.31.131.61
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 166.31.131.1
DNS Servers . . . . . . . . . . . : 141.240.192.10
141.240.10.10
Primary WINS Server . . . . . . . : 166.31.131.2
LAN2 Workstation
Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : FL1
Primary DNS Suffix . . . . . . . : RXL.XTVZ.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : RXL.XTVZ.com
Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : RXL.XTVZ.com
Description . . . . . . . . . . . : 3Com 3C918 Integrated Fast Ethernet Controller (3C905B-TX Compatible)
Physical Address. . . . . . . . . : 00-B0-D0-26-62-B0
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 166.31.132.140
Subnet Mask . . . . . . . . . . . : 255.255.255.128
Default Gateway . . . . . . . . . : 166.31.132.129
DNS Servers . . . . . . . . . . . : 141.240.192.10 141.240.10.10
Primary WINS Server . . . . . . . : 166.31.131.2
Also the shares on LAN2 don't show up on either LAN1 or 2 but can be mapped statically from LAN1

by jdbooe

can you manually map to a share on lan2 ie: right click on Network Neighborhood, then "Map Network drive"? if so the problem might just be a computer browser service issue.. stopped, disabled, or?..

by geno

Yes, I can manually enter the IP and share name and get it to logon. I added the address of LAN1s router as an alternate gateway on LAN2 and I can now manually address the shares there. The LAN2 Computers show up on the NT PDC as part of the domain but they don't show up on any of the workstations when I look at the domain computers there. I also checked and the Computer Browser service is running on the PDC and I can't find any error messages in the event log related to it.

by sean wyatt

Delete your LMHosts files. When WINS is installed LMHosts override WINS settings. It seems that WINS is doing its doing its job as you can see LAN2 PCs at the PDC. Getting rid of LMHosts Files on the workstations will force them to get their browse list from the WINS server/PDC instead of looking for them on their own. Since the Workstations are looking on their own the Netbios broadcasts are not traversing the WAN.

by geno

Tried deleting the LMhosts on several workstations on both LAN1 and LAN2 but it didn't make any difference.

by dao251

the config looks fine... though, MS does recommend using a BDC/WINS at each site...

it seems there is a problem with name resolution traffic through WAN (maybe through one of the routers)

Are you sure the routers are not blocking UDP 137 & 138and TCP 139 in all directions?
May that happen latency in your T1 is high?

Dima

by geno

Even though I'm responsible for the LANs and the workstations and servers the MAN and routers are handled by another section of the corporation. After talking to them they said it was probable that 139 was blocked and they will send someone out to look at it. Thanks.

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