z/OS Communications Server: SNA Network Implementation Guide
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Nodes with APPN function only

z/OS Communications Server: SNA Network Implementation Guide
SC27-3672-01

A VTAM® APPN node is an SNA type 2.1 node that functions in a peer-to-peer environment. APPN nodes use APPN or low entry network (LEN) connections to communicate with other nodes in an APPN network.

A VTAM APPN node:
  • Does not require subarea network routing definitions
  • Uses control point-control point (CP-CP) sessions for network control data and logical unit-logical unit (LU-LU) sessions for user data
  • Does not support system services control program-system services control program (SSCP-SSCP) sessions
  • Has the NODETYPE start option defined
  • Does not have a subarea number defined on the HOSTSA start option
    Note: If the start option, SACONNS, is set to NO, VTAM HOSTA is a pure APPN node even if HOSTA is coded.
  • Cannot activate a network control point (NCP)
  • Requires static definitions only for those resources located within the node
  • Also provides dynamic definitions of some local connections
Parent topic: VTAM nodes

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