CSLA Network Topology: Today and Tomorrow

1
CSLA Network Topology Today and Tomorrow

• Edmund Gean
• Dec 7, 2000

2
Introduction

• Network terminology
• CSLAs current network topology
• Troubleshoot network problems
• Limitations of CSLAs current network
• Tomorrows network topology

3
Network Terminology

• Hubs
• layer 1 device
• limited intelligence
• shared bandwidth
• bridge (switch)
• layer 2 device
• forward packets based on hardware address (eg.
  Ethernet)
• larger aggregate bandwidth
• routers
• layer 3 device
• forward packets based on IP address
• blocks broadcast packets
• examples

4
Local Area Network

• Shared bandwidth
• Ethernet and Token Ring

hub
hub
hub
Server
PC
PC
Server
PC
PC
5
Bridged (Switched) Network

• Traffic Isolation
• dedicated bandwidth
• less collision prone
• higher aggregate bandwidth
• broadcast storm

bridge
hub
hub
Server
PC
PC
Server
PC
PC
6
Layer 2 Networks at CSLA

• Ethernet (10Base2, 10Base5, 10BaseT, 100BaseT,
  100BaseF, 1000BaseF )
• Token Ring (4Mbps, 16Mbps)
• FDDI (100Mbps)
• ATM (55Mbps)

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Routed Network

• Broadcast traffic isolation

Router
Bridge (switch)
Bridge (switch)
hub
hub
hub
hub
Server
PC
PC
Server
PC
PC
Server
PC
PC
Server
PC
PC
8
Layer 3 Protocols at CSLA

• IP
• Appletalk

9
Intra-Building Copper Wiring

• Horizontal copper cable runs between offices and
  telecom closet
• Vertical copper cable runs between IDF telecom
  closets and buidings main telecom closet (BDF)
• patching of cable runs
• intra-building wiring diagrams (http//www.calstat
  ela.edu/ats/network)

10
Inter-Building Fiber Run
11
FDDI Backbone
12
Campus Backbone Topology
13
Troubleshooting Network Problems

• Ping hostname
• tracert hostname
• traceroute hostname
• neotrace
• sniffer
• big brother
• network management software

14
Limitations of Current Network

• Speed
• Bandwidth Contention
• Limited support for bandwidth-hungry applications
• mobility

15
Migrating To a Faster Network

• Gigabit Ethernet Backbone
• replacing shared network with switched network
• switched server farms
• wireless hubs

16
Final Remarks

• Future Client/Server Application Needs
• Cost/Performance Issues