SNA Server Interoperability with Windows Load Balancing

• Microsoft SNA Server, versions 2.11, 2.11 SP1, 2.11 SP2, 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0, 4.0 SP1, 4.0 SP2

SUMMARY

Windows Load Balancing Server (WLBS) is a TCP/IP-based load-balancing solution that load balances incoming TCP/IP packets to all nodes in a cluster or a single node in a cluster. WLBS distributes the load across identical servers. All nodes in the cluster must be configured identically to provide the same system services.

You can configure WLBS to load balance on multiple servers filtered to use single affinity, no affinity, or Class C. SNA Servers can function in a WLBS environment configured for single affinity, however, it is not recommended. When configured for single affinity, all incoming packets using the WLBS virtual IP address are locked to a specific node in the WLBS cluster. Every packet that is sent from the client using the cluster IP address connects to that node. WLBS does not make any application routing decisions; all load-balancing rules are based on TCP/IP routing decisions.

MORE INFORMATION

SNA Server exhibits the following limitations:

• SNA client's request for 3270 or APPC Logical Units (LUs) may not exist on the targeted SNA Server. SNA Server rejects the requested LU and cannot service the client's request.



• SNA Server may not have any 3270 or APPC LUs available to service the SNA client-requested LU Pool.



• SNA clients are not able to request a LU from another SNA Server when an SNA connection fails.

Q128244 SNA Server Load Balancing and Hot Backup

Additional query words:

Keywords : sna211 sna211sp1 sna211sp2 sna3 sna3sp1 sna3sp2 sna3sp3 sna3sp4 sna4 sna4sp1 sna4sp2
Version : WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,3.0 SP1,3.0 SP2,3.0 SP3,4.0,4.0 SP1,4.0 SP2
Platform : WINDOWS
Issue type : kbinfo