IBM SC30-3865-04 - Manual (Page 54)

in conjunction with the APPN DLUS/DLUR function. The APPN DLUS/DLUR
solution allows the node to appear to VTAM as multiple PU devices, each
supporting up to 253 dependent LUs. A node wishing to provide TN3270E Server
services over a subarea connection for more than 253 clients simultaneously must
also appear as multiple PUs to an attached host.
Subarea connections are supported over the following DLC types:
v Ethernet
v Token Ring
v FDDI LANE
v LSA
v Frame Relay
Note: Support for Subarea SNA connections for TN3270E Server services
eliminates the need for APPN in the host. However, APPN must still be
configured in the router.
A subarea-attached SNA node configuration with a device performing the TN3270E
Server function and appearing to VTAM as multiple downstream PUs is shown in
Figure 2.
See “Configuring TN3270E Using a Subarea Connection” on page 77 for a
configuration example.
Figure 2. Multiple PUs for Subarea Connected SNA Nodes
APPN
24 MRS V3.2 Protocol Config Ref Vol 2
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