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Madge Networks Token Ring Switch Introducing multiple uplinks - 1

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Smart DeskStream Technical Presentation 44

nResilient links

Backbone

Source Route Switching

Introducing multiple uplinks - 1

A

Ring Number 101

Dual uplinks to the same backbone switch

This is an illegal configuration - two ports on the

same switch cannot connect to the same ring

Note: SRT+ will not overcome this - SRT+

learns configuration from ring poll process,

which DeskStream only performs on each port

Spanning tree will close one of the ports

Duplicate links to the same Ringswitch will usually result in a bridging

error - bridging a ring to itself makes no sense - and spanning tree

will close one of the ports

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