Madge Networks Token Ring Switch Stacking Module

Smart DeskStream Technical Presentation 20

nStacking Module and Cable

nInstalled into stacking slot on rear of each

DeskStream in a stack

lmodule has two mini SCSI connectors

nSupplied with short, mini-SCSI cable

nTop port connects to DeskStream above

nBottom port connects to DeskStream

below

nUnused ports do not need to be terminated

n8 DeskStreams can be stacked

nStacking bus has 640Mbps data

throughput

Connectivity

Stacking Module

The stacking bus is not configurable in any way

It uses a cell-based communications technology (similar to ATM)

The cells are 53 bytes long including an 8-byte header and 45 bytes

of payload

The bus has 640Mbps of bandwidth available and each DeskStream

can access up to 350Mbps.

Contents

Main Objectives nAt the end of this session you will be able to: What is Desktop Switching ? Conventional Shared Token Ring Fully Switched Token Ring Page Page into existing networks Hub Replacement Powerful, Flexible Connectivity Resilience 2 x 100Mbps Powerful, Flexible Connectivity Resilience and Performance Smart DeskStream Family Summary Page Page Page concentrator (on Ringswitches) ports Ports Ports - 2 Ports - 3 Ports - LEDs Status LEDs Page Stacking Module nBottom DeskStream nSingle IP address per stack nSingle download image, Stacking Module - 2 swapped Stacking Module - 3 Stack 1 Stack 2 Stacking Module - 4 Stacking Module - 5 Single Stack Page Uplink Connectivity TR Fiber Module - 1 TR Fiber Module - 2 TR Fiber Module - 3 High Speed Token Ring HSTR Copper and Fiber Modules - 1 HSTR Connectivity HSTR Copper and Fiber Modules - 2 HSTR Connectivity HSTR Fiber Module Page Smart DeskStream Manager Command Line Interface (CLI) Network Management Software Downloads files Management Features Easy to configure options Simplified support Smart DeskStream Manager Advanced Functionality Telnet and serial interface menu is easy: Smart DeskStream Manager Command Line Interface Diagnostic Downloads Diagnostic Features Page Objectives Page Annex K Frame Forwarding using CRF Backbone Introducing multiple uplinks - 1 Ring Number 101 A Introducing multiple uplinks - 2 Bridging using BRF 109107 108 BRF Port Interface (SRB) Virtual port Bridging using BRF CRF Port Interface (Local) Page Setting up the BRF interfaces Page Page Combining CRF and BRF functions CRF Summary CRF will attempt to learn the ring number from the RIF in passing frames as will the BRF. Introducing multiple uplinks - 3 Active 101 Active Ring Number 102 Page IEEE Spanning Tree Support Ring Number 101 IEEE SPT Ring Number 102 CRF