Microsoft KB Archive/246685

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Maximum number of supported objects that are allowed in SNA Server and in Host Integration Server

Article ID: 246685

Article Last Modified on 12/4/2007


  • Microsoft SNA Server 4.0 Service Pack 4
  • Microsoft Host Integration Server 2000 Standard Edition
  • Microsoft Host Integration Server 2000 Service Pack 1
  • Microsoft Host Integration Server 2000 Standard Edition
  • Microsoft Host Integration Server 2004 Standard Edition
  • Microsoft Host Integration Server 2006

This article was previously published under Q246685


This article lists the maximum number of supported objects for Microsoft SNA Server and for Microsoft Host Integration Server.


You must consider the following:

  • Com.cfg, the configuration file for SNA Server 4.0 and earlier versions, has a limit of 65,536 objects, or records. You can view the type and number of objects by using the Snacfg.exe file. For example, you can use the following command: '

    snacfg #com.cfg /count

  • The configuration file for Host Integration Server and later versions does not have an object limit.
  • A "node" is one instance of the SNA Server service. SNA Server and Host Integration Server support up to four nodes per server.
  • SNA Server 4.0 and Host Integration Server 2000 support a maximum of 30,000 LUs per server. Host Integration Server 2004 supports 60,000 dependent LUs. However, we have only tested as many as 30,000 dependent LUs in a Host Integration Server 2004 installation.

    Note SNA Server 4.0 and Host Integration Server 2000 and later versions do not prevent you from specifying more than the supported limit of LUs.

If you exceed an object in SNA Server, you may receive the following error message:

Limit Reached on Number of Objects of This Type

For example, if an administrator assigns more than 4,000 LUs to a particular user or group, this error occurs. By design, SNA Server has set limits on the number of objects that can be added to SNA Manager. These limits depend on the type of object. Host Integration Server 2000 and later versions do not have these limits.

Area Object Maximum
Server Servers per SNA subdomain 15
Server Nodes per server 4
Server Nodes per SNA subdomain 60
Server Connections per node 250
Server Active client sponsor connections per server 8000
Link Service Link services per server 64
Link Service Links (adapters) per server 1,024
Link Service Connections per adapter 250
LUs LUs per node 15,000
LUs LUs per user/group 4,000
LUs Dependent LUs per connection 255
LUs LUs per passthrough connection 255
Pools LUs assigned per pool 30,000
Pools 3270 pools 10,000
Pools LUA pools 10,000
Pools Downstream LU pools 10,000
Users Users per pool 10,000
Users Users per LU 10,000
APPC Modes per LU 64
APPC Partners per LU 250
APPC LUs per mode 10,000
APPC APPC LUs per node 3,000
APPC APPC Remote LUs per connection 10,000
APPC Maximum negotiated sessions per Local APPC LU 15,000
CPIC CPIC symbolic destination names 454


For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

228924 "SNA OLE the number of objects has reached their limit" error message

225261 Error line number returned by Snacfg.exe may be incorrect, other enhancements

107192 Multiple connections to the same host over 802.2

317805 Sponsor connection changes in Host Integration Server

Keywords: kbtshoot kbprb KB246685