reverse path visibility with agent-to-agent tests
Post on 21-Jan-2017
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About ThousandEyesThousandEyes delivers visibility into every network your organization relies on.
Founded by network experts; strong
investor backing
Relied on for critical operations by leading enterprises
Recognized as an innovative
new approach
27 Fortune 5005 top 5 SaaS Companies
4 top 6 US Banks
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View Across Internal and External NetworksHosting / SaaS
Provider
1 Internal network – Monitor WAN, Datacenter
Internet
3 Monitor any service, application from global vantage points
2 Monitor IaaS, SaaS service hosted in the cloud
Cloud AgentEnterpriseAgents
Branch
Data Center
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• Agent-to-Server– Test Target is an application or service endpoint
• Agent-to-Agent– Monitoring location and test target are both agents– Cloud–Enterprise or Enterprise–Enterprise
Network Tests
• Visibility and insight into the network used to connect between each testing location and target
• Usually bundled with other types of tests - HTTP, Page Load
What
Types
When • Hop-by-hop network path and node level data• Packet loss, Jitter, Latency, Bandwidth
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Reverse Path
• A to B B to A • Packet’s do not flow symmetrically over a network
• Peering relations between ISP’s • Load-balancing algorithms • Multiple ECMP paths
• Traceroute based monitoring techniques focus ONLY on forward path
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Accurate real-time representation of forward & reverse paths providing visibility into internal and external networks
More precise diagnostic data to help isolate faults with directional and hop by hop granularity significantly reducing MTTT
Unified visualization to simplify deployment workflows and management
Agent-to-Agent Tests
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Bidirectional View Across Internal and External Networks
Hosting / SaaS Provider
1 Internal network – Monitor WAN, Datacenter
Internet
3 Monitor any service, application from global vantage points
2 Monitor IaaS, SaaS service hosted in the cloud
Cloud AgentEnterpriseAgents
Branch
Data Center
4 Discover Forward & Reverse paths. Outbound ISP performance
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• Internal WAN Monitoring– Discover ECMP paths – Precise metrics in both directions
• Performance of outbound/egress path from branch office or datacenter– Compare ISP performance across forward and reverse path
• Forward and Reverse Path MTU
Agent-to-Agent Use Cases
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NAT Basics
Enterprise Agent
Web ServerNAT
10.0.0.2:1025 <-> 49.1.4.23:3827
10.0.0.2:1025 -> 1.2.3.4:80 49.1.4.23:3827 -> 1.2.3.4:80
NAT Table
1.2.3.4:80 -> 49.1.4.23:38271.2.3.4:80 -> 10.0.0.2:1025
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• NAT configurations allow communication originating from the internal network
• Externally originating communication normally require forwarding rules on the NAT
NAT Basics
Enterprise Agent
NAT
1.2.3.4:80 -> 49.1.4.23.3:827
Cloud Agent
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• Agent-to-Agent tests require NAT device to allow externally generated communication – Requires security department to open a port – Increases configuration rules
• NAT Traversal facilitates communication between endpoints across NAT devices w/o the need for inbound rules
NAT Traversal
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Step1: Add an Agent-to-Agent TestAgent-to-Agent tests is a part of
Network tests
Select a target agentSelect from available agents as the test source
Select the direction for the test
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Step 2: Configure Alerts
Add End-to-End alerts for Agent-to-Agent tests
Specify the direction of the tests for the alerts
Map the alerts to the test
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Step 4: Explore Path Visualization showing forward and reverse paths
Loss only see in the reverse path
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How to enable NAT Traversal Flag Enable NAT Traversal Flag for Enterprise agents under “Advanced Settings”
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