Avaya Configuring APPN Services Bedienungsanleitung Seite 32

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Configuring APPN Services
1-10 114049 Rev. A
Connection Networks
APPN end nodes on a shared access transport facility (SATF), such as a Token
Ring network, are directly connected to each other; they can communicate with
each other without having to route traffic through an intermediate network node.
However, these end nodes still require definitions to other nodes and the nodes
must be accessible over CP-CP sessions. A connection network (CN) simplifies
APPN configurations by reducing the number of connections that you must
configure between nodes on an SATF.
When two nodes on the same SATF exist on the same connection network, these
nodes are unaware that they have a direct connection to each other; the NNS,
acting as an APPN virtual routing node (VRN), calculates a route between the two
end nodes so that they can communicate directly. For the end nodes to
communicate with each other over a connection network, the end nodes require a
connection to the VRN and a connection to the NNS.
Figure
1-5 illustrates a sample connection network. This connection network,
such as that between EN2 and EN3, may use resources at the network node (NN1)
to establish sessions with each other.
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