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Q96685: TCP Extensions for LAN Manager Require TCP/IP

Article: Q96685
Product(s): Microsoft LAN Manager
Version(s): 
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 19-FEB-2002

SUMMARY
=======

In addition to LAN Manager system requirements, NetBIOS applications such as the
TCP/IP extensions for LAN Manager require resources such as sessions, names, and
NCBs from the protocol stack (TCP/IP in this case).

The PROTOCOL.INI file is used to configure the protocol stacks and determine the
number of resources the stacks provide to applications. The LANMAN.INI file is
used to determine how many of the protocol stack resources LAN Manager is
allowed to appropriate.

ALLOCATION
----------

At startup, LAN Manager by default takes all of the sessions, NCBs, and names
that are offered by the stack, leaving none for other NetBIOS applications.
However, the [networks] section of LANMAN.INI can be modified in order to limit
this usage. The Setup program should take care of this for you, but if you
choose to edit the files, you must be careful not to create other problems.

  [networks]

  netn=devicename$,ln,type,sessions,ncbs,names
  by defaultdevicename = NetBIOS device driver name from PROTOCOL.INI
  ln = The lana number, default is 0
  type = The driver type. LM10 and LM30 are valid entries
  sessions = The number of NetBIOS sessions for LANMAN to use
  ncbs = The number of network control blocks for LANMAN to use
  names = The number of NetBIOS names for LANMAN to use

In order for the TCP/IP extensions to start, LAN Manager must leave at least one
session, NCB, and name available. This means that there must be a line in the
[networks] section of LANMAN.INI specifying these numbers, and that the numbers
must be at least one less than what the TCP/IP stack provides as determined by
PROTOCOL.INI.

EXAMPLES
--------

PROTOCOL.INI
------------

[TCPIP_XIF]

 DRIVERNAME = TCPIP$
 IPADDRESS0 = 11 1 9 220
 SUBNETMASK0 = 255 255 0 0
 DEFAULTGATEWAY0 =
 TCPSEGMENTSIZE  = 1450
 TCPWINDOWSIZE   = 4350
 NBSESSIONS = 100
 NUMNCBS         = 200
 BINDINGS = "UBNEITP_NIF"
; numnames = 18   (by default)

This stack is providing 100 sessions, 200 ncbs, and 18 names for
NetBIOS applications to use.

LANMAN.INI
----------

  [networks]

  net1 = tcpnb$,0,LM10,98,198,10
  net2 = netbeui$,0

LANMAN.INI specifies that LAN Manager should only use 98 sessions, 198 ncbs, and
10 names of those available for the TCP/IP stack. This leaves 2 sessions, 2
ncbs, and 8 names available for other applications, such as the TCP/IP
extensions. Because the NetBEUI line doesn't specify any limits, LAN Manager
will acquire all sessions, names, and NCBs available from NetBEUI.

ADJUSTMENTS BEFORE STARTUP
--------------------------

The TCP/IP extensions for LAN Manager will not start correctly unless an entry
limiting resources consumed by LAN Manager is in LANMAN.INI. If sessions, NCBs,
or names are re-configured in PROTOCOL.INI, then the corresponding parameter in
LANMAN.INI must also be modified in order for the change to work properly. This
is explained on page 381 of the LAN Manager 2.2 "Installation and Configuration
Guide," but the last line on that page is incorrect. TCPIP$, not NETBEUI$,
applies here.

If no resources are available for the TCP/IP extensions, the following error will
result when attempting to start the related services:

  NET3057: An internal consistency error has occurred.

REFERENCES
==========

LAN Manager version 2.1a "Update for Administrators" manual

LAN Manager version 2.2 "Installation & Configuration Guide"

Additional query words: node hub 2.10a 2.1a 2.20 2.2

======================================================================
Keywords          : kbnetwork 

=============================================================================

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