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- DOCUMENT:Q103444 23-SEP-1993 [W_NTAS]
- TITLE :RAS Server 64 Port Limitation Information
- PRODUCT :Microsoft Windows NT Advanced Server
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- --------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT Advanced Server version 3.1
- --------------------------------------------------------------------
-
- Remote Access Service (RAS) for Windows NT Advanced Server does NOT
- prevent administrators from configuring more than 64 dial-in ports.
- However, the system will not support more than 64 simultaneous
- incoming connections. Attempting to do this results in unpredictable
- behavior. Microsoft does not support any attempt to exceed 64
- simultaneous configured ports.
-
- MORE INFORMATION
- ================
-
- RAS requires that a NetBIOS LANA number be assigned for each dial-in
- and each dial-out port. If a port is configured for both, it requires
- two LANAs. Port types are assigned in the Network Control Panel
- application RAS Configuration screen.
-
- Port type # of LANAs
- -----------------------------------
- Dial-in 1
- Dial-out 1
- Dial-in and Dial-out 2
-
- Windows NT has a fixed limit of 72 total NetBIOS LANAs. You should
- configure all your RAS ports to consume less than 64 LANAs (see the
- above chart). The remaining eight LANAs are generally set aside for
- use with other network protocol bindings.
-
- This explains why when you look at the NetBIOS configuration in the
- Network Control Panel application, you will sometimes see RAS taking
- up more LANAs than there are COM ports installed. For example, if you
- have a Windows NT Advanced Server with two internal COM ports and you
- have configured both ports for dial-in and one port for both dial-in
- and dial-out, when you look at the NetBIOS configuration, you will see
- three LANAs assigned to RAS bindings.
-
- For more information, query on the following word in the Microsoft
- Knowledge Base:
-
- lana
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: ntrmt
-
- =============================================================================
-
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- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
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- ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
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-
- Copyright Microsoft Corporation 1993.