 |
» |
|
|
|
In order for the SNAplus2 node to communicate with other nodes,
you must configure connectivity with at least one adjacent node.
A connecting link can be configured to carry dependent traffic,
independent traffic, or both.You can have adapter cards for one
or more link protocols installed in your computer. Much of the information
you need to enter to configure connectivity depends on the link
protocol you are using. The remote node must also have an adapter
card of the same type you choose. For a list of the link protocols
supported by SNAplus2, see “Defining Ports, DLCs, and Connection
Networks”. To configure a link, you need to define a port as described
in “Defining Ports, DLCs, and Connection
Networks”. In addition (in
most cases), you must configure a link station as described in “Defining Link Stations”.If LUs on the local
node are to communicate with a host using DLUR, you must also define
a DLUR PU on the local node as described in “Defining DLUR PUs”. When using the Motif administration program, a data link control
(DLC) is automatically configured as part of the configuration for
the port. In addition, you have the option of defining the port
as part of a connection network. When using command-line configuration,
this configuration is separate from port configuration.The information
required for link configuration depends on the link protocol, whether
your network is an APPN network, and on whether the link is for
dependent traffic, independent traffic, or both. In addition, the
links that you need to configure depend on what kind of communication
you need to support: - Using
3270, RJE, or LUA
If you are going to use 3270, RJE, or LUA you need
to configure a link to the host computer. The link must be configured
for dependent traffic, and it must be configured on the host computer
as well as on the SNAplus2 node, so consult your SNA network planner. - Using CPI-C, 5250, or APPC
If you are going to use CPI-C, 5250, or APPC and
your network is not an APPN network, you need to configure links
to all the adjacent nodes that you want to access. These links must
be configured for independent traffic, and they must be configured
on the adjacent nodes as well as on the SNAplus2 node, so you may
need to consult your SNA network planner. - Operating as an APPN Node
If the SNAplus2 node is an end node in an APPN network,
the number of links that you need to configure can be greatly reduced.
You can configure links to one or more adjacent network nodes and
access all nodes in the APPN network using these links. If you want
to access other adjacent nodes directly, you can configure links
to them too—this is not usually necessary, but it can give
better performance. If the adjacent nodes are connected by token
ring, Ethernet, or FDDI, direct links can be set up dynamically
so you don't need to configure them—just make sure that
you configure the network as a connection network when you define
the port. The benefits of APPN networking are always available for 5250
and independent APPC, but they do not apply to 3270, RJE,or LUAunless
you use DLUR. (DLUR supports communications between a host and dependent
LUs on the local node or on downstream nodes in an APPN network.)
You can use DLUR only if your host supports DLUS, so you should
consult your SNA network planner if you are interested in using
DLUR. - Using 3270, RJE, or LUA on Multiple Nodes
If you are going to use 3270, RJE, or LUA on multiple
nodes, you can reduce the number of host links required by using
PU concentration. You can use PU concentration to connect non-SNAplus2
nodes, or SNAplus2 nodes in a different domain. If you want to use
PU concentration, you need to configure a host link, enable PU concentration,
and configure links between the SNAplus2 node and the downstream
systems. Traffic between the host and downstream LUs can then use
links to the PU concentrator instead of requiring direct links to
the host. Unless you already have links between each downstream
node and the host, you can avoid additional investments in cabling
and link configuration by using PU concentration. For information about configuring PU concentration, see “Configuring PU Concentration”.
|
Printable version
