Resilient Network Design Concepts
“The Janitor Pulled the Plug…”
Network Design and Architecture…
What is a Well-Designed Network?
The Three-legged Stool
New World vs. Old World
How Do We Get There?
Redundant Network Design
Basic ISP Scaling Concepts
Modular/Structured Design
Functional Design
Tiered/Hierarchical Design
Multiple Levels of Redundancy
The Basics: Platform
The Basics: Environment
Bad Architecture (1)
Bad Architecture (2)
Even Worse!!
Typical (Better) Backbone
The best architecture
Benefits of Layer 3 backbone
Multi-homed Servers
HSRP – Hot Standby Router Protocol
HSRP – RFC 2281
HSRP
Circuit Diversity
Circuit Bundling – MUX
Circuit Bundling – MLPPP
Load Sharing
Policy-based Routing
Convergence
Factors Determining Protocol Convergence
OSPF – Hierarchical Structure
Factors Assisting Protocol Convergence
PoP Design
PoP Design – Wrong
PoP Design – Correct
Hubs vs. Switches
Beware Static IP Dial
Network Operations Centre
Operations
In Summary
Home Page: http://www.ws.afnog.org/
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