Employment Security Department

1
Employment Security Department

• Point-to-Point Wireless Networking

2
Wirelesss Bridge design

• Connectivity for new building
• Strict timeline
• Expense
• Performance
• Reliability
• Lessons learned

3
Connectivity

• LAN access for new building
• 50 people plus printers
• Internet
• E-mail
• Mainframe
• File/print servers

4
Timeline

• Immediate need for connectivity (45-60 days)
• WAN connection might be done in time
• Lengthy permit process to run fiber-optic cable

5
Expense

• Limited budget
• Construction costs for fiber
• WAN circuits perpetual cost
• Wireless one-time initial outlay no perpetual
  expense

6
Performance

• T-1 1.544 Mbps
• Wireless 11 Mbps (dual-circuits)
• No brainer

7
Reliability

• Maintained backup WAN for 6 months
• Zero downtime for approx. 18 months
• Slow response during construction
• Tree limbs BAD!
• Creative logging

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Lessons Learned

• Increase security
• WEP
• MAC filter
• No broadcast SSID
• Keep large distance from trees
• Etherchannel works
• WEP not secure