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  • Network is so slow - please help us to find the reason

    We have 5 workstations and 1 server, brand new from dell with dual processor, 15k Raid 1 disks , SAS. 4 GIGA of ram, the server is a DC and is only serving 5 workstations, the only thing we have hosted on the server is quickbooks and 1 GB of art files.


    Issues :

    1. its take ages for users to log in to the domain, there is no profiles set up or login scripts or anything.

    2. browsing the files on the server takes a lot of time too.

    3. working on quickbooks on the server is slow as well.

    everything should be so much faster in our environment, the server is brand new and the latest in technology, but still something in the pysical network in my opinion is causing slowness or some of the components maybe is fauly or not set up correctly, the server can support to up to 1 GB ethernet connection, so we are thinking of changing the switch to 1 GB switch, we really hope this will resolve our issues, but is there any other way to determine what is casuing the problem? software? or tools? please help us out, we spent so much money recently and still have not had the performance we hoped for.

    Thanks
    liran

  • #2
    Re: Network is so slow - please help us to find the reason

    1. Possible DNS issue
    2. Possible anti virus scanning network transfers (eg Symantec enables network scan by default)
    3. As above
    1 1 was a racehorse.
    2 2 was 1 2.
    1 1 1 1 race 1 day,
    2 2 1 1 2

    Comment


    • #3
      Re: Network is so slow - please help us to find the reason

      Hi lirank.

      Well with the information given it would be like searching for a needle in a haystack... I don't even know what OS you're running (but maybe 2003 R2 since it's new?)

      Others probably have better advice for you but here's some tools to help you find that needle.

      You could use tools like Perfromance Monitor and Network Monitor or Process Explorer to see if you notice anything...
      You could also see what MBSA has to say about your configuration... also sometime products have utilities to tell you if they've been configured properly... (like Exchange)
      Regards,
      Jeremy

      Network Consultant/Engineer
      Baltimore - Washington area and beyond
      www.gma-cpa.com

      Comment


      • #4
        Re: Network is so slow - please help us to find the reason

        Some general information is required about your setup.

        What Server OS??
        What Client OS??

        What are your IP details of both the server and clients??
        Are your systems in a workgroup or a domain??

        My guess.....

        You have DNS issues.

        Does your server point to itself for DNS resolution?? Does your DNS server have forwarders setup??

        Do your clients point to the internal DNS server for DNS resolution??

        Comment


        • #5
          Re: Network is so slow - please help us to find the reason

          OK here are some answers - I am on the actual site at the moment so if anyone could reply as soon as possible i will appreciate very much.


          1. Server 2003 R2 - Service pack1

          2. OS - all windows professional service pack 2

          3. the network is on a domain.

          4. Server ipconfig/all :

          Windows IP Configuration

          Host Name . . . . . . . . . . . . : SERVER
          Primary Dns Suffix . . . . . . . : hq.cottonfruit.com
          Node Type . . . . . . . . . . . . : Unknown
          IP Routing Enabled. . . . . . . . : No
          WINS Proxy Enabled. . . . . . . . : No
          DNS Suffix Search List. . . . . . : hq.cottonfruit.com
          cottonfruit.com

          Ethernet adapter Local Area Connection 2:

          Connection-specific DNS Suffix . :
          Description . . . . . . . . . . . : Broadcom BCM5708C NetXtreme II GigE (NDIS
          VBD Client) #2
          Physical Address. . . . . . . . . : 00-18-8B-31-8C-18
          DHCP Enabled. . . . . . . . . . . : No
          IP Address. . . . . . . . . . . . : 192.168.0.1
          Subnet Mask . . . . . . . . . . . : 255.255.255.0
          Default Gateway . . . . . . . . . : 192.168.0.254
          DNS Servers . . . . . . . . . . . : 192.168.0.1
          192.168.0.254


          client IP config/all

          Windows IP Configuration

          Host Name . . . . . . . . . . . . : AvivitMain
          Primary Dns Suffix . . . . . . . : hq.cottonfruit.com
          Node Type . . . . . . . . . . . . : Hybrid
          IP Routing Enabled. . . . . . . . : No
          WINS Proxy Enabled. . . . . . . . : No
          DNS Suffix Search List. . . . . . : hq.cottonfruit.com
          cottonfruit.com

          Ethernet adapter Local Area Connection:

          Connection-specific DNS Suffix . :
          Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
          on
          Physical Address. . . . . . . . . : 00-0C-F1-E5-38-DF
          Dhcp Enabled. . . . . . . . . . . : No
          IP Address. . . . . . . . . . . . : 192.168.0.2
          Subnet Mask . . . . . . . . . . . : 255.255.255.0
          Default Gateway . . . . . . . . . : 192.168.0.254
          DNS Servers . . . . . . . . . . . : 192.168.0.254


          5. nslookup from the server:

          C:\Documents and Settings\Administrator>nslooku
          Default Server: server.hq.cottonfruit.com
          Address: 192.168.0.1

          any reponse will be appreciated very very much,
          Liran

          Comment


          • #6
            Re: Network is so slow - please help us to find the reason

            Well I'll make a few assumptions like "the DC is running DNS" and "192.168.0.254" is some sort of router that's probably performing NAT and maybe DNS proxy...

            I don't know whether the router or the server is doing DHCP but I think you'll need to change the DNS server in the DHCP options to point to the DC (192.168.0.1)
            Regards,
            Jeremy

            Network Consultant/Engineer
            Baltimore - Washington area and beyond
            www.gma-cpa.com

            Comment


            • #7
              Re: Network is so slow - please help us to find the reason

              Originally posted by lirank
              OK here are some answers - I am on the actual site at the moment so if anyone could reply as soon as possible i will appreciate very much.


              1. Server 2003 R2 - Service pack1

              2. OS - all windows professional service pack 2

              3. the network is on a domain.

              4. Server ipconfig/all :

              Windows IP Configuration

              Host Name . . . . . . . . . . . . : SERVER
              Primary Dns Suffix . . . . . . . : hq.cottonfruit.com
              Node Type . . . . . . . . . . . . : Unknown
              IP Routing Enabled. . . . . . . . : No
              WINS Proxy Enabled. . . . . . . . : No
              DNS Suffix Search List. . . . . . : hq.cottonfruit.com
              cottonfruit.com

              Ethernet adapter Local Area Connection 2:

              Connection-specific DNS Suffix . :
              Description . . . . . . . . . . . : Broadcom BCM5708C NetXtreme II GigE (NDIS
              VBD Client) #2
              Physical Address. . . . . . . . . : 00-18-8B-31-8C-18
              DHCP Enabled. . . . . . . . . . . : No
              IP Address. . . . . . . . . . . . : 192.168.0.1
              Subnet Mask . . . . . . . . . . . : 255.255.255.0
              Default Gateway . . . . . . . . . : 192.168.0.254
              DNS Servers . . . . . . . . . . . : 192.168.0.1
              192.168.0.254
              Remove the 192.168.0.254 address from the servers DNS server.
              Add your ISP to the forwarders tab from within DNS.


              Originally posted by lirank
              client IP config/all

              Windows IP Configuration

              Host Name . . . . . . . . . . . . : AvivitMain
              Primary Dns Suffix . . . . . . . : hq.cottonfruit.com
              Node Type . . . . . . . . . . . . : Hybrid
              IP Routing Enabled. . . . . . . . : No
              WINS Proxy Enabled. . . . . . . . : No
              DNS Suffix Search List. . . . . . : hq.cottonfruit.com
              cottonfruit.com

              Ethernet adapter Local Area Connection:

              Connection-specific DNS Suffix . :
              Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
              on
              Physical Address. . . . . . . . . : 00-0C-F1-E5-38-DF
              Dhcp Enabled. . . . . . . . . . . : No
              IP Address. . . . . . . . . . . . : 192.168.0.2
              Subnet Mask . . . . . . . . . . . : 255.255.255.0
              Default Gateway . . . . . . . . . : 192.168.0.254
              DNS Servers . . . . . . . . . . . : 192.168.0.254


              5. nslookup from the server:

              C:\Documents and Settings\Administrator>nslooku
              Default Server: server.hq.cottonfruit.com
              Address: 192.168.0.1

              any reponse will be appreciated very very much,
              Liran
              Your clients are pointing to the default gateway for DNS resolution. These MUST point to your server, 192.168.0.1

              How many clients do you have as this is aot easier using DHCP than static IP's.

              Comment


              • #8
                Re: Network is so slow - please help us to find the reason

                I just changed and login is much much faster, and now I can even see the clients are registering the DNS correctly. I prefer to use static IP for only 5 workstations we have because I am going to set up a few port forwarding on the firewall.

                the network is still slow in terms of quickbooks and file browsing, maybe because we have large image files and we view them as thumbnails, any help of speeding up that will be appreciated.

                Comment


                • #9
                  Re: Network is so slow - please help us to find the reason

                  Just a comment on your preference for Static IPs. Why not use Dynamic and increase the the lease time? The standard set in our schools is a 90 day lease. That sort of makes then static so you could set your port forwarding and still have the luxury of not having to visit each PC when a change has to be made. Gotta love DHCP. If you want to have to have your eyes opened to what DHCP can really do, seriously consider Train Signal's DHCP Lab. Let the software do the work for you. Read the review of the DHCP Lab and see what you think.

                  You might only have 5 IPs to manage now but what happens when you move on and you try an apply your same methods to 20, 50, 1000 machines?
                  1 1 was a racehorse.
                  2 2 was 1 2.
                  1 1 1 1 race 1 day,
                  2 2 1 1 2

                  Comment


                  • #10
                    Re: Network is so slow - please help us to find the reason

                    2. browsing the files on the server takes a lot of time too.
                    3. working on quickbooks on the server is slow as well.


                    These 2 Problems will not be solved if you Correct Your DNS settings.These problem will happen if
                    windows kernel is locked and can't be accessible through programs like windows explorer.

                    Comment


                    • #11
                      Re: Network is so slow - please help us to find the reason

                      Originally posted by S2002
                      2. browsing the files on the server takes a lot of time too.
                      3. working on quickbooks on the server is slow as well.


                      These 2 Problems will not be solved if you Correct Your DNS settings.These problem will happen if
                      windows kernel is locked and can't be accessible through programs like windows explorer.
                      Browsing anywhere will be slow because as we all know windows xp relies very very heavily on DNS. With the clients pointing to the DNS server on the router this will forward all request that it cannot handle to the ISP'd DNS server as this is the only DNS servers it knows about.

                      Now the ISP will not know about the internal domain namespace of the users domain. Thus the extremely slow nature of the network.

                      Comment

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