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Distributed Network Monitoring of
Wireless Metropolitan Networks
Stefano Gridelli Cofounder/CEO
NetBeez
Agenda• Centralized vs. Distributed Monitoring
• Wireless Metropolitan Networks
• Distributed Network Monitoring of wireless metropolitan networks
Centralized Network Monitoring• SNMP based
• Centralized SNMP poller
• MIB information
SNMP poller
Hub Site(Data Center)
Spoke Site(Branch Office)
Internet Service Provider
Spoke Site(Branch Office)
Spoke Site(Branch Office)
Hub-and-Spoke
Split Tunnel
Hub Site(Data Center)
Internet Service Provider
Spoke Site(Branch Office)
Spoke Site(Branch Office)
Spoke Site(Branch Office)
Limits of Centralized Monitoring
Remote Office NYC
?
?
?Remote Office
LAX
Remote Office ATL
✓ Network Operation Center
(IT headquarters)
Distributed Network Monitoring
Remote Office NYC
Network Operation Center (IT headquarters)
✓
Remote Office LAX
Remote Office ATL
✓
✓
✓
Wireless Metropolitan Networks• WiFi hot spots
• Mesh networks
• MANET (Mobile Ad-Hoc Networks)
Past and Present Experiments• Meraki wireless in San Francisco
• Burning Man (NANOG 62 - M. Peterson)
• Wireless Community Networks
• Oakland Mesh Network
• NYC Mesh
• Pittsburgh Meta Mesh
Challenges of Wireless Mesh Networks
• Connectivity and reachability
• Performance
• Service continuity
Distributed Network Monitoring of Wireless Metropolitan Networks• Verify connectivity and reachability
• Track end-to-end latency and packet loss
• Do periodic site surveys
• Identify dark spots
Distributed Wireless Monitoring• Ping and Traceroute
• Mesh nodes
• Internet gateways
• Internet targets
• DNS queries
• HTTP GET
• Bandwidth and Jitter tests
Benefits• Quick detection
• Reachability and latency information
• Full coverage
(n * (n - 1)) / 2
Open Discussion Session• Mesh network deployments
• MANET
• Distributed network monitoring first, network automation next?