Iygapyisi cause10-slideshare

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If you gotta problem, Yo I'll solve it: Using tools to solve network problems

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Iygapyisi cause10-slideshare

  1. 1. If You've Got a Problem, Yo – I'll Solve It: Using Tools to Solve Network Problems Derek Engi Network Management Engineer North Carolina State University
  2. 2. Agenda  Network Monitoring and Management Tools  Making the Most of Free / Open Source Software  Real World Problems, Real World Tools  Questions and Discussion
  3. 3. Network Monitoring's Greatest Hits  NetDisco – Discovery & Inventory  Cacti – Graphing & Alerting  Splunk – Reporting & Analysis
  4. 4. NetDisco  Network Discovery Engine  Mix of Perl and PostGreSQL  CDP / SNMP Mappings of Topology  VLAN and Port Up/Down Manipulation  Our Authoritative DB for Other Applications  API! - Woohoo!
  5. 5. Cacti  Generate Graphs for Network Devices  PHP with MySQL Backend  Round Robin Database (RRDs)  Device / Interface Statistics  Plugin Architecture  Pseudo-API! - Pseudo-Woohoo!
  6. 6. Splunk  Fancy Log Indexer / Analyzer  Free Version and Commercial License  Applications / Plugin Architecture  Scalable and Awesome  Awesome API!
  7. 7. It Goes to 11...err Making Things Proactive
  8. 8. Case Study #1 – Trending Traffic  Conserving While Leveraging Building Fiber  Targeting Upgrade / Problem Child Area  Open Source Solution! “My internet/backups/imaging software/$application doesn't run so hot.” Can we get some additional bandwidth?
  9. 9. Case Study #1 – Trending Traffic  Thresholds to the Rescue!  Easy to Configure and Template Cacti Plugin  Alerting Functions  Endless Possibilities  Allows Tracking, Trending, and Review  Port-Channels Cheaper Than Hardware
  10. 10. Case Study #2 – Wide Scale Anomalies  Is Something Weird Happening in the DC?  We've Been Adding Port-Channels....  Whoa, Check the WeatherMaps! “So why does it take our backups so long to complete?”
  11. 11. Case Study #2 – PHP Weathermaps  Open Source Cacti/Other Data Source App  Generate Large or Small Scale Snapshots  Integration w/ NetDisco  Getting back to our problem...Dude, something seems wrong.
  12. 12. Case Study #2 – Solution  HSRP Between DC Cores, equal cost paths advertised through OSPF  Arp Cache, set to 2 hours  “I think I will forward this frame out all switch ports..yeah.....”.  Lather, Rinse, Repeat.  Changing the Arp and CAM timers to match fixes the problem.
  13. 13. Where Are We Going?  Utilizing NetDisco for Inventory, Idle Port Reports, VLAN Management, etc.  Extending Cacti Graphs down to the LAN Admins, thresholding more stuff, (IPTV,UPS')  Weathermaps – Unicast and Multicast Representation down to the end-user  Splunk – Providing firewall access logs to appropriate parties via Firewall Config Tool
  14. 14. Extending Management to the End User  Switch Admin Tool – VLAN Config, Port Descriptions, Duplex/Speed Settings. View MACs on a port. Uses NetDisco, Cacti.  Firewall Config Viewer – Extending visibility into the security side of the network.  Extending tool functionality to other OIT groups via an API.
  15. 15. Links NetDisco - www.netdisco.org Cacti - www.cacti.net Splunk - www.splunk.com Cacti Plugins – www.cactiusers.org PHP Weathermaps - www.network-weathermap.com
  16. 16. Questions? Comments? Other Cool Tools You Can't Live Without? Thank You! Derek Engi derek_engi@ncsu.edu

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