[Webinar] Learn how to a build a cloud-first strategyRegister Now


Pt 2 Pt T1 connectivity issues at secondary location with Active Directory/Network shares

Posted on 2005-05-13
Medium Priority
Last Modified: 2012-05-05
We have 2 locations.  A and B.  They are connected via a Pt 2 Pt T1 line.  Half of that is voice, the second half  data.  I have approx 25 users at location B.  We are using Adtran Netvanta 3205's on each end.

Location A is running Windows 2000 server and has approx 60 users.  Location A houses the exchange server/domain controller.  Location A is on a 111.111.120.x IP config (DHCP).  Location B is on a 111.111.121.x IP schema (DHCP).  A secondary company on location B's network is still static so they can reach their server.

We are unable to see computers from location A when browsing my network places at location B.  Also, network shares don't always function properly and it almost seems as though active directory or some global policies always carry over to B either.  I also have some issues with bandwith or so it seems.  some users when trying to open an email with an attachment takes excessivly longer than it should.  Or just trying to access a network share takes longer than i would think it should.  

I was wondering if I need to add some lookup zones on the DNS server or if there was anything someone may know which could be causing my issues.  Adtran has reviewed the config and i am confident that they are correct.

I am actually about to roll out another Pt 2 Pt T1 between the 2 sites and plan on seperating the 2 companies.  the new pt 2 pt will be only data for one company.  the other company will use the 1/2 T and share with the voice.  I plan on putting the PC's on the new T as DHCP so I am just hoping someone has an idea what may be causing my issues.

Question by:akafiti
  • 2

Expert Comment

ID: 13997649
First, browse lists like My Network Places are a NetBios function, and are broadcast dependant.  Unless you're intentionally forwarding broadcasts between your networks, that won't work.  

For general AD performance issues, if you've only got one domain controller, and it's at one end of the T1, that's most probably the cause of your issues.  Just about everything related to network shares, Group policies, and Exchange (2000 or later, at least, which I'm assuming in your case) depends on access to a domain controller to read the Active Directory.  If your T-1 is heavily loaded, that AD traffic will be a problem, both by contributing to the overall network load, which slows other things down, and by experiencing the delays, etc., which will cause all sorts of issues with about everything you mentioned. . . .

I'd probably recommend installing a second DC at your second site, so it can handle all of the directory access traffic for that site, which won't have to cross the T-1, then.  The server to server replication between the DC's ought to be less network intensive, and is definitely more delay resistant. . . .  And the cost of one additional server (at least one - I'd really recommend having two at your main site for redundancy) will be substantially less than the cost of an additional T-1.

Author Comment

ID: 14019753
I understand what this says and I will attempt this in the near future.  besides adding a domain controller to the other location, do you think there is anything else I can do to help?  again, most things we are able to do.  just sometimes things decide not to work.  do i need to do anything with reverse or forward lookup zones?

The pt 2 pt T line is actually very inexpensive as the locations are literally 1/2 mile apart from each other.  and anticiapting additional traffic with images going back and forth as we attempt to go paperless.

Accepted Solution

bkinsey earned 375 total points
ID: 14021256
I really don't think you've got a DNS issue, from the description.  With a single domain, you'll only have one lookup zone (forward and reverse, although reverse is not absolutely required).  And with a single DNS server, assuming your DNS is AD integrated, there's really nothing to configure.  If you add another DNS server as a secondary server for your zone, it will house the same zone info, but if you AD integrate that one as well, the zone info is populated automatically.

Having said that, it won't hurt to check the contents of you existing lookup zone(s).  If you've got machines missing, or incorrect addresses, you do have a problem, and will need to address that in addition to the network browsing issue. . .

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
Resolve DNS query failed errors for Exchange
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Are you ready to place your question in front of subject-matter experts for more timely responses? With the release of Priority Question, Premium Members, Team Accounts and Qualified Experts can now identify the emergent level of their issue, signal…
Suggested Courses

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question