Where are computers using 'net view' ?

Discussion in 'Server Networking' started by Grant, Jun 16, 2005.

  1. Grant

    Grant Guest

    We have 2 subnets:

    192.168.1.*
    192.168.200.*

    When I do a net view I can only see computers from the 192.168.1.* subnet.

    I am on the 200 subnet and can ping any machine on the network and connect
    to there file shares and stuff but when I browse the network I dont see the
    200 subnet....

    Can anyone tell me why half my machines are hidden?

    Thanks,
    Grant
     
    Grant, Jun 16, 2005
    #1
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  2. Grant

    Daniel Guest

    doesn't net view use a broadcast? A broadcast does not normally
    traverse a router.
     
    Daniel, Jun 16, 2005
    #2
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  3. Grant

    Grant Guest

    Wierd thing is I am on the .200 subnet which means I shouldnt see the .1
    subnet ....

    The server has two network cards configured for the same subnet (.200)-
    would that cause a problem?
     
    Grant, Jun 16, 2005
    #3
  4. Grant

    Gary D Guest

    Are you using WINS ?


     
    Gary D, Jun 16, 2005
    #4
  5. Half aren't using a WINS Server and half are.
     
    Phillip Windell, Jun 16, 2005
    #5
  6. Grant

    Grant Guest

    Yes I am using Wins. When I search all records in the WINS database all
    machines are found. Sould I get rid of WINS?

    Looking through the event logs shows that theres also a browser war going on
    between machines. Im getting 2 types of errors in the event log repeatedly:

    -----------------
    Event ID: 8021
    The browser service was unable to retrieve a list of servers from the
    browser master \\machinename on the network
    \Device\NetBT_Tcpip_{17C84128-D36D-4981-9974-2616A07EE8AE}.
     
    Grant, Jun 16, 2005
    #6
  7. Grant

    Jetro Guest

    Lost .200 view may be caused by initial "Duplicate name exist" error and its
    resolution.
     
    Jetro, Jun 16, 2005
    #7
  8. Grant

    Grant Guest

    I moved DHCP to a new server and one of the client machines got a duplicate
    IP address error message yesterday. Is that what you mean? Is there a way
    to clear this error database and start again?
     
    Grant, Jun 16, 2005
    #8
  9. Just do a "release/renew" on the machine. It will not be a lasting problem.
    Don't mess with anything.
     
    Phillip Windell, Jun 16, 2005
    #9
  10. Grant

    Mark P Guest

    DHCP servers are supposed to check to see if an ip address is on the
    network. if it doesn't find it then it will pass out that il address.

    One thing that i did before moving DHCP was to set the exporation for a DHPC
    ip was down to about 15 min. That way the computer would request a new ip
    address sooner rather than later. Standard time out is 1 day i think not
    sure. I have mine set to 8 because of the amount of guest that come in and
    out of the office. It allows for IPs not to be taken up all day long if we
    run out.

    As far as your Browser war is conserned -- i have that problem also because
    of subnetting. I'm running about 50 different subnet through Cisco routers.
    and 4 states. If i use ip helper address through the routers to pass out
    DHPC to those locations on there subnet (my DHCP scope is huge BTW) and
    don't cut off other ports on the router .. everything would be at war
    because a computer on each subnet will want a master browers for there
    subnet. Windows 98 computers will also cause Browser issues. They don't
    understand windows 2000 and above.

    If you are not running a router between your subnets then you should make
    your DHCP and Master DC servers 255.0.0.0 class A or even a class B
    255.255.0.0 sub net. The server will see both subnets.. and just give the
    server 2 different ip address.. i.e. 192.168.1.1 and 192.168.200.1 DHCP
    server can be 192.168.1.2 and 192.168.200.2. i only have 1 ip and a class A
    subnet on my corp lan the servers have no issues seeing all comuters across
    the WAN.

    One other thing to note is that if you wish to no tmake your servers have 2
    IPs / class AorB subnet / 2 subnets. Then you need a router on your network
    behind the firewall that will route that traffic to different computers.

    if you want all computers to see all computers then subnet for all should be
    255.255.0.0 for a 192.168.xxx.xxx network... all computers from 192.168.1.1
    to 192.168.254.254 (192.168.255.255 is a broad cast) that should also fix
    the problem because they are all part of the same subnet.


     
    Mark P, Jun 16, 2005
    #10
  11. A computer on each subnet must have a master browser in order
    for browsing to occur. It's called a segment master browser.
    Ip helper forwards broadcast packets meant for the local LAN
    to remote segments causing browse errors just like the ones
    the OP is seeing. A multihomed master browser will cause the
    same errors.

    Putting them all on the same tcp/ip subnet is not a viable solution IMHO.
     
    Michael Giorgio - MS MVP, Jun 16, 2005
    #11
  12. Grant

    Grant Guest

    Thanks for that info. I should explain in further detail what the
    configuration is here.

    Machine1: win2k3, DC, 2 network cards on the same subnet, was cofigured for
    routing and remote access, now disabled.
    Machine2: win2k3, DC, 2 network cards on the same subnet, cofigured for
    routing and remote access. This machine will be replacing Machine1.

    Machine2 has been trying to get the browser list from machine1 for a couple
    of days now and now when I try and browse the domain from machine2 I get
    this new error message:

    ----------------------
    System error 6118 has occurred.
    The list of servers for this workgroup is not currently available
    ----------------------

    However I can browse ALL machines on my domain from Machine1. I can see both
    subnets fine. Any other computers on this subnet can only see the .1 subnet
    though.

    This problem has something to do with this pesky browser service. All I have
    changed on Machine2 is to remove the Wins server from each network card and
    enable NETBIOS over TCP/IP. The machine is now impotent at browsing the
    domain.

    Why cant machine2 get this list from machine1? They can both see each other
    fine - theyre both DC's ffs!

    grrrrr

     
    Grant, Jun 17, 2005
    #12
  13. You've got multihomed master browser issue:
    http://support.microsoft.com/search/default.aspx?qu=multihomed master browser

    BTW WINS aids in browsing.

     
    Michael Giorgio - MS MVP, Jun 17, 2005
    #13
  14. Grant

    Jetro Guest

    Machine2: ... 2 network cards on the same subnet...
    In what mode are your NICs now, i.e. B-, P-, M-, or H-node?
     
    Jetro, Jun 18, 2005
    #14
  15. Grant

    Bill Grant Guest

    To add to what Michael has said, using a DC as a remote access server is
    not a great idea. Browsing will certainly be a problem and you may get
    problems with DNS as well. There are a couple of KB articles on this. They
    were issued for W2k but still apply for W2k3 DCs. The issue is similar to
    the old NT problem of multihomed browsers.

    292822 Name Resolution and Connectivity Issues on Windows 2000 Domain
    Controller with Routing and Remote Access and DNS Installed.

    830063 Name resolution and connectivity issues on Windows 2000 domain
    controllers that have the Routing and Remote Access service and DNS
    installed.
     
    Bill Grant, Jun 18, 2005
    #15
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