IBM 8285 Nways, Installation And User Manual

Page: 61 / 265

Connecting ATM Devices to Form a Network
The following sections provides guidelines for building an ATM Campus Network:
Ÿ Linking user devices to a switch (via UNI interface)
Ÿ Linking switches together (via SSI interface) to form clusters
Ÿ Linking clusters together (via NNI interface) to form subnetworks
Ÿ Linking subnetworks together (via NNI) to form a Campus Network
Linking User Devices (UNI Interface)
ATM devices that can be connected to a Switch using the UNI interface include terminals and
workstations, routers, bridges, concentrators and servers.
Figure 14. Connections to User Devices (UNI)
Guidelines for Configuring UNI Ports on the ATM Workgroup Switch:
Ÿ Both PVCs and SVCs can be defined on the same physical port
Ÿ For SVCs, the connection identifiers (VPI:VCI) have VPI equal to 0.
Ÿ For PVCs, both Virtual Path (VP) connections and Virtual Channel (VC) connections are supported:
– VP Identifiers (VPI) are in the range:
- 0-7 over 25.6Mbps ports
- 0-15 over all other ports
– VC Identifiers (VCI) are in the range 32-1023.
Ÿ The Well-Known PVC 0.17 (ATM Forum LAN Emulation) is supported. This PVC can be defined
using the
SET PVC command, or using Nways Campus Manager ATM version 1.1.2.
Ÿ ILMI is not required for ATM connection through PVC.
Ÿ The maximum number of ILMI registered addresses per switch is 1024.
Chapter 3. Building an ATM Campus Network
33