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Configuring APPN Services

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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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Avaya Configuring APPN Services Manual do Utilizador Página 28