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Subnet/Node addressing in a Vista Classic network

Issue

If "Use server assigned subnet/node address" is unchecked and manual addressing is used what addressing guidelines should be followed.

Environment

Vista Server/Workstation

Vista Classic Network

Cause

The node addressing of a network can be performed in different ways. All nodes need an individual Subnet/Node address, in other words, a logical address.

The Subnet address can be any number between 1 and 255. Server assigned subnet/node addressing typically uses Subnet 255. To facilitate future router connections it is recommended that you start with Subnet no. 10. Normally the I/O modules or STR 350/351s have the same Subnet address as their TAC Xenta 280/300/401.

Resolution

The addressing of a TAC Xenta Node should follow some simple rules.

  1. Each TAC Xenta device requires three consecutive node addresses; the first for the device itself, the other two are always reserved for the handling of one or two operator panels.
    Example: Device 1 - Node address 10(and 11 and 12 for any OP)
  2. For each TAC Xenta 301/302 device a maximum of two I/O modules or STR 350/351s may be added (for TAC Xenta 401 ten I/O modules/STRs; for TAC Xenta 280 two STRs), each requiring its own address. The address will typically follow the two OP addresses.
    Example: I/O Module 1 - Node address 13.
    I/O Module 2 - Node address 14 and so on.
  3. The maximum number of Node addresses on one subnet is 127 (125 for the TAC Xenta 280/300/401).
    If the number of nodes exceeds 125 on a Subnet, or if logical grouping is required for other reasons, a new subnet number is used.
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