HP UX SNAplus2 manual Ports, Link Stations, Connection Networks

	Introduction to SNAplus2
	SNAplus2 Resources
	In the Motif administration program, DLCs are not shown directly. The
NOTE
	information required for configuring a DLC is displayed as part of the
	configuration of a port owned by the DLC.
	Ports
	A port represents the local end of a communications link as a unique
	access point in the network. In general, this corresponds to a single
	physical access point such as an adapter card. However, some link
	protocols (such as token ring) enable you to define multiple ports for a
	single adapter; in this case, the different ports are distinguished by
	addresses (such as the SAP address).
	Each port is associated with a specific DLC. One or more ports can use
	the same DLC.
	Link Stations
	A link station represents the logical path through the SNA network
	between the SNAplus2 local node and a remote computer. The remote
	computer can be any of the following:
	• A host computer on which SNAplus2 accesses a host program using
	3270, RJE, or LUA communications (or uses APPC or CPI-C for
	program-to-program communications)
	• A peer computer with SNAplus2 and the remote computer
	communicating as equal partners (the typical arrangement in an
	APPN network)
	• A downstream computer that uses the SNAplus2 PU concentration
	feature or DLUR feature as a gateway to access a host.
	A link station is associated with a specific port. One or more link stations
	can be defined on the same port.
	Connection Networks
	Connection networks cannot be used by LEN nodes.
	Nodes that are connected to the same token ring, Ethernet, or FDDI
	network have a direct communications path between all nodes, so that in
	theory any two nodes can communicate directly. Such a network is
	referred to as a shared-access transport facility (SATF).

92 Chapter 2