HP-UX SNAplus2 R7 Administration Guide

Deﬁning Connectivity Components

Deﬁning DLCs, Ports, and Connection Networks

For information about conﬁguring PU concentration, see Section 9.2, Conﬁguring PU Concentration.

5.1 Deﬁning DLCs, Ports, and Connection Networks

A port represents the local end of a communications link as a unique access point in the network. Each port is

associated with a speciﬁc link protocol, which can be any of the following:

• SDLC

• Token ring

• Ethernet

• FDDI

• X.25 or QLLC (qualiﬁed logical link control)

• Enterprise Extender (HPR/IP)

You can conﬁgure more than one port that uses a particular link protocol. In general, a port corresponds to a single

physical access point such as an adapter card, but some link protocols (such as token ring) enable you to deﬁne

multiple ports for a single adapter. The different ports are distinguished by addresses (such as the SAP number).

When you use the Motif administration program to deﬁne a port for a particular link protocol, SNAplus2

automatically deﬁnes a DLC for the port if a DLC of that type has not already been deﬁned. For command-

line conﬁguration, you must deﬁne the port and DLC using different commands.

In an APPN network using token ring, Ethernet, FDDI, or IP link protocols, you can also use the SAP Conﬁguration

dialog to indicate that the port is part of a connection network.

If you are using PU concentration, you can deﬁne a template that is used to generate deﬁnitions for implicit link

stations (link stations that are not explicitly conﬁgured). Implicit link stations can support downstream LUs. If im-

plicit PU ﬁelds are modiﬁed while the port is active, the changes affect any implicit link station instances generated

after the change.

To conﬁgure a port, connection network, and DLC, use one of the following methods:

Motif administration program

Select

Connectivity and

New port from the

Services menu on the Node window.

Command-line administration program

To conﬁgure a DLC:

define_type_dlc

To conﬁgure a port:

define_type_port

In these commands, type indicates the link protocol type (sdlc, tr, ethernet, fddi, qllc, ip).

To conﬁgure a connection network:

define_cn

Advanced port conﬁguration parameters provide control over BTU size, the number of active links permitted,

generation of implicit downstream LUs, and settings for dynamic link stations.

5.1.1 DLC, Connection Network, and Port Conﬁguration Parameters

The following parameters are required for port conﬁguration. (When you use the Motif administration program, port

conﬁguration also supplies information about the DLC and enables you to assign a port to a connection network.)