Redundant Network Design By: Brett C. Lewis

Why ?

• Every organization, no matter what the industry, faces significant risks when voice and data communications are interrupted ▫  Productivity comes to a halt ▫  Transactions cannot be processed ▫  Critical applications go offline ▫  Employees can’t serve customers ▫  Liability and fraud exposure increases

What is redundancy ?

•  “2” connections utilizing “2” diverse routes and “2” separate carriers combining at the same destination supplying a single service.

Facts about Carriers

•  85% of all municipal carriers share the same middle mile ingress and egress conduits and connections.

•  95% of all municipal carriers share the same last mile switching and terminations.

•  98% of all Tier 3 Internet Carriers use the local municipal carriers for last mile access.

2 Internet Carriers

•  Two carriers that have diverse egress routes out of the local area

•  Two carriers that have diverse ingress routes to your location.

Diverse Internet Technologies

Load Balancing BGP

2 WAN Carriers

•  Two carriers that can scale their capacity to become the primary carrier at any moment.

•  Two carriers that are not subject to the same environmental impacts. ▫  Line cuts ▫  Rain ▫  Weather ▫  Construction

Diverse WAN Technologies Spanning Tree OSPF Ether Channel

My Perfect Scenario

Single Office

Multiple Office

Summary

•  True redundancy requires 2 of all core services with a single destination

•  85% of all carriers share conduit and leased line • Utilizing different connectivity and networking

technologies can assist in creating a truly redundant network.

Questions