Enterprise Networking Brandon Wagner BYU OIT Network Engineer

Who Am I?  IT Major – Graduate in August 2010  Worked for BYU OIT for 4 ½ years (2 part-time, 2 ½ full-time)  Primary Responsibilities  Cisco NAC  Packetshaping  Packet Analysis  Data Center Design  New Construction Design  Secondary Responsibilities  Firewalls  Routing/Switching  QoS  Network Security

Lecture Outline  How do you build a scalable, efficient, and service oriented campus/enterprise network?  What specific technologies are implemented at each layer of the campus/enterprise network (specifically BYU)?

Network Design  Things to Consider:  Security  Bandwidth  Cost  Resilience  Services  What do you need?  How much of it do you need?  Does your planning meet the need?

The Setup  Switch (Layer 2)  MAC Address to Port Number (MAC/CAM Table)  Router/Switch (Layer 2.5)  Maps MAC Address to IP Address (ARP Table)  Router function (Layer 3)  IP Routes (Routing Table)

Enterprise Network Architecture

Edge/Access  Main Function  Connect end user devices to the network.  Only place in network that is NOT redundant.  Services  IP Phones  Access Points  End User Connections  DHCP Snooping  VLANs  Port Security (MAC Address limiting)  Equipment  Layer 2 switches with managed service that run in “hardware”

Edge/Access Layer Cont’d Cost: $26,000 DHCP Snooping JKB Access Closet

Distribution  Main Function  Bridge Core and Edge devices (Layer 2.5)  Provide redundancy to minimize failure recovery time  Services  Firewalls  QoS Policing  Route between edge VLANs  ACL’s  Anti-spoof  Route Summarization  Equipment:  Layer 2/3 Switches

Distribution Cont’d Cost: $76,000 TNRB Distribution Closet EIGRP Routing

Core – High Speed Switching  Main Function  Connect distribution points  All Layer 3  High availability, adapts quickly to change, no packet manipulation.  Services:  IGP (EIGRP, IGRP)  IS-IS  OSPF  Equipment  Very Fast Layer 3 Switching (360Gb/sec to 15Tbps/sec) in “hardware”  BYU: 496,000 packets/sec average, 960,000 packets/sec peak in Core

Core – Cont’d Cost: $150,000

BYU Campus Architecture

Other Implementations  Data Center Design  Router Core  Row End  Top of Rack  Service Provider  Router Core  Metro Area  Customer Edge  Enterprise Edge  Provider Edge  Campus  Campus Core

Case Study: XO Communications

Enterprise Edge DistributionEdgeCore

Pro’s and Con’s to the Enterprise Model  Pro’s  Resilient to problems, change  Easier to Manage  Con’s  Expensive  More time in the planning phase  Others?

Layer 1 - Cabling  Fiber  Single Mode  Multi Mode  SC connector  LC connector  Copper  Cat5E  Cat6

Questions?