HP -UX SNAplus2 Bedienungsanleitung PDF herunterladen (Seite 233)

Chapter 9 233

Conﬁguring Passthrough Services

Conﬁguring DLUR

Normally, a dependent LU session requires a direct communications link

to the host computer. If many nodes (including a host node) are

connected together in an APPN network, some of them may have an

indirect connection through another node instead of a direct connection

to the host. Without a direct connection, it is not possible to establish

dependent LU sessions to the host from LUs in these indirectly

connected nodes.

Dependent LU requester (DLUR) is an APPN feature designed to

overcome this limitation. DLUR can be conﬁgured on an APPN node

(such as a node running SNAplus2). It works in conjunction with

dependent LU server (DLUS) at the host, to route sessions from

dependent LUs on the DLUR node across the APPN network to the

DLUS host.

The route to the host can span multiple nodes and can take advantage of

APPN's network management, dynamic resource location, and route

calculation facilities. DLUR must be available on the node where the

LUs are deﬁned, and DLUS must be available on the host node, but you

do not have to enable DLUR on any intermediate nodes in the session

route.

NOTE You cannot conﬁgure DLUR on a LEN node.

To conﬁgure DLUR support on the local node, you must perform the

following conﬁguration tasks:

Step 1. Deﬁne the local node as described in “Conﬁguring the Node”.

Step 2. Conﬁgure connectivity to the APPN network. APPN connectivity

requires at least a port and link station for independent trafﬁc between

the local node and the adjacent APPN network node, as described in

Chapter 5, “Deﬁning Connectivity Components.”

Step 3. Deﬁne a DLUR PU on the local node as described in “Deﬁning DLUR

PUs”. (The DLUR PU supports connectivity to the host.)

Step 4. To conﬁgure DLUR to support LUs on the local node, you must add the

LUs on the local node, as described in Chapter 8, “Conﬁguring User

Applications.”. The LUs can be conﬁgured to support 3270 display, 3270

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HP -UX SNAplus2 Bedienungsanleitung Seite 233