Monday, July 2, 2012

Design Layers

Access Layer


  • Same Logical Network
  • Passes Traffic to Distribution Layer if destination is not on local network
  • Connection point for user devices to connect to the network
  • Lets local hosts share network resources like printers and other network devices / resources.
  • Switches / Hubs

 Distribution Layer

  • Location that local networks converge.
  • Routes traffic to other networks
  • Switches / Routers
  • Passes information to the Core Layer
  • Keeps local traffic local
  • Controls the flow of data between networks
  • Filters traffic for security and management

Core Layer

  •  High Speed Backbone 
  • Large amounts of data passed between end networks
  • High speed Routers and Switches

Tuesday, June 19, 2012

EIGRP

What is EIGRP?

Enhanced IGRP - Routing protocol that combines features of link state routing and distance vector routing.

Drawbacks

  • Cisco Proprietary - Compatibility with other Vendors may not be supported.

Benefits

  • Low overhead for Network Resources
  • Supports Manual Route Summarization
  • Fast Convergence
  • Supports Multiple Protocols

Basic Cisco IOS Setup Commands

  • router eigrp 100
  • network 172.16.2  0.0.0.0   (The second ip octet designation is the wildcard mask and is optional - but it will default to Classful network boundries if not specified (class A,B,or, C))
  • network 172.16.3  0.0.0.255

 Manage / Monitor EIGRP