Sun Microsystems SunLink SNA 9.1 PU2.1, Руководство по настройке

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Overview 1-9
1
To have an XID-3 exchange and independent LU support, you must set DLC
Role to Negotiable. Otherwise, SDLC support is PU 2.0 only.
1.4.3 QLLC Connections
You can use the Qualified Logical Link Control (QLLC) protocol to connect the
Sun PU2.1 SNA Server to an IBM communications controller over X.25 Packet
Switched Data Networks (PSDNs) by using X.25 virtual circuits (VCs). Both
Permanent Virtual Circuits (PVCs) and dial-in and dial-out Switched Virtual
Circuits (SVCs) are supported.
The communications controller runs the IBM NCP Packet Switched Interface
(NPSI) program (Version 2/Release 1 or higher) and uses the QLLC protocol to
control the transmission of data across the VC.
QLLC connections support packet and window size negotiation and point-to-
point lines.
Although multi-point lines are not supported, multiple QLLC connections can
be supported over a single link over the X.25 PSDN.
Note –
The QLLC protocol only supports PU 2.0.
1.5 PU2.1 Emulation
When operating in traditional hierarchical SNA networks, the Sun PU2.1 SNA
Server emulates a PU2/PU2.1 device, such as a 3274 cluster controller or a 3174
establishment controller.
When operating in peer-to-peer SNA networks, the Sun PU2.1 SNA Server
uses Advanced Peer-to-Peer Networking (APPN) or Low Entry Networking
(LEN) to connect to a PU2.1 peer system, such as AS/400 and System/36. The
server supports traditional display emulation and hierarchical connectivity and
peer-to-peer connectivity using the SNA LUType 6.2 protocols.
The number of physical units you can configure depends on the connection
type, as follows:
•
IBM Token Ring, Ethernet, and FDDI LAN connections
- You can
configure multiple PUs for each Service Access Point (SAP) and multiple
SAPs for each network interface controller.