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
Distribution EdgeCore
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?