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TUNDRA The Ultimate Netflow Data Realtime Analysis. Jeffrey Papen Yahoo! Inc. Source and Destination AS bandwidth analysis Transit AS bandwidth analysis Custom AS macros: Bandwidth forecasting, peering merit analysis Billing Formulas for cost/ benefit budget analysis.

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Presentation Transcript
tundra features
Source and Destination AS bandwidth analysis

Transit AS bandwidth analysis

Custom AS macros: Bandwidth forecasting, peering merit analysis

Billing Formulas for cost/ benefit budget analysis

Analyze usage for local servers or services - Charge Back Billing

Symmetric Network Performance Analysis: latency and packet loss

AS path hop count stats

DOS attack detection

All in Real Time

TUNDRA Features
why should you care about tundra
Empirical Data

Prove that network performance increases

Prove that network reliability increases as AS hops decrease

Cost/Savings analysis for new peer or transit

Know how much bandwidth a peer will use before (or after) you turn link up – determine private vs. public peering need

Focus and Order peer hit list – who should you go after?

Business case to document support for peers that say No.

Why should you care about TUNDRA?
slide5

49,000 subnets

processed in

2 – 3 minutes

Continuously exporting flows

500Mb/sec in + out in 15 minutes generates approx

5,244,216 flows (288 MB). Processed in 21 seconds @ 248,724 flows/sec

Polls

Interfaces.

Stores to

local DB

Flow % * SNMP stored in central DB

MySQL Database

Zebra Server

Router

SNMP Poller

Collector/

Processor

slide10

Transit Data

All outbound flows have destination IP

Each Destination Subnet learns AS path from Zebra BGP table - AS padding removed

Zebra BGP table is identical to actual routes used on local router(s)

Local BGP data reflects immediate policy changes with no performance impact or security threat to production routers

slide13

Performance Analysis

  • ICMP Ping vs. TCP packet with bogus SYN/ACK
  • Testing is done from your network’s perspective
  • Route-Maps on collector interface
    • Simultaneous testing of multiple paths to same target AS
    • No continuous IBGP flapping from /32 updates
    • No adding and removing /32 static routes
    • No 3rd party remote applications logging onto routers
    • Looking Glass server (www) for troubleshooting
slide14

TUNDRA Next Steps

  • White Paper – No, I really mean it!
  • I’m looking for help – this is a hobby, not my job
  • Maintainers to finish baking code and configuration
  • Release to Internet community
  • Licensing is GPL + please peer with Yahoo! 
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