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Monitoring WAN Performance With Cisco IP SLA


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Unless you’ve spent the last few years buried beneath Spanning Tree Protocol (STP) issues or lost somewhere within Active Directory, chances are that you’ve heard of Cisco IP SLA. Just in case you haven’t, it’s wicked cool technology that lets you have your routers and switches run traffic/application tests from their location in the network so that you can better understand how the network is performing. While this is nifty all by itself, the true power of IP SLA is exposed when you use a network management system to collect, analyze, and display the results from the IP SLA operations your devices are running. In this webcast, we explain Cisco IP SLA in detail and demonstrate how the new Orion IP SLA Manager makes implementing and leveraging Cisco IP SLA easy. Some of the things we cover are:

• What IP SLA is and how it works
• Which devices support IP SLA
• Best practices for deploying Cisco IP SLA
• Using Orion with Cisco IP SLA
• A tour of Orion IP SLA Manager

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Monitoring WAN Performance With Cisco IP SLA

  1. 1. Introduction  A big “Howdy” from SolarWinds based in Austin, Texas » Josh Stephens, Head Geek, Monster Blogger, Constant Tweeter » Nikki Jennings – SE Manager, Amateur UFC Fighter » Emmanuel Tychon – Technical Manager w/Cisco Systems, Part-time Bull Fighter  Today’s Topic: Monitoring WAN Performance with IP SLA  Who is SolarWinds? » What we do… » Who are our customers? » The SolarWinds community…
  2. 2. Housekeeping  Can you hear me now?  If not, use the WebEx Q&A panel to contact the moderator  How do you win the free stuff?  How do you ask questions?  Will this thing be recorded?
  3. 3. Agenda  Introduction to IP SLA  Why IP SLA?  Technical Alternatives  SCP Questions  Requirements  IP SLA Operations  Configuring IP SLA  IP SLA Impacts  Where to get more help  IP SLA Tools Demo  Summary and Q&A
  4. 4. What is IP SLA? Cisco IOS IP SLAs (IP Service Level Agreements) is a feature included in Cisco IOS Software that can allow administrators the ability to Analyze IP Service Levels for IP applications and services. IP SLA's uses active traffic- monitoring technology to monitor continuous traffic on the network. This is a reliable method in measuring site-to- site network performance. Cisco Routers can also act as IP SLA Responders to provide more accuracy in measurements across a network. Source –
  5. 5. Traditional Network Monitoring  Implies a “hub and spoke” methodology  NMS typically sits in the middle and polls outward  Doesn’t represent site-to-site performance  Implies two-way but tests one-way  Today’s networks  MPLS vs. Frame relay  Fully-meshed networks are common-place  Local sites with direct internet access
  6. 6. Why IP SLA?  Network troubleshooting and monitoring  Perspective is ultra-important  Multiple test points  Several different types of operations  Existing Infrastructure  No need to deploy probes or agents  Built into already deployed Cisco devices  Easy to configure/leverage
  7. 7. Technical Alternatives  Probes  Expensive  Increase your carbon footprint  Hard to maintain  Slow deployment  Agents  Nobody likes a footprint  Even harder to maintain/manage  Not usually free
  8. 8. SCP Question #1 The first 5 correct answers get a free SolarWinds t-shirt  Question – In order for a network to achieve “Five 9’s” availability, what is the maximum amount of downtime for the year?  Answer – 5 minutes
  9. 9. Requirements for using IP SLA  IP SLA Devices  Most Cisco routers and switches  Especially helpful for in edge devices  Need CLI or SNMP access to enable  IOS (see next slide)  IP SLA Statistics use  View from command-line  Real-time monitoring tools  Long term monitoring for historical trending and alerting
  10. 10. Availability and Operations 12.1(1) 11. 12.0(5)T 12.1 12.2(11)T Feature/Release 12.0(3)T T 12.2(2)T 12.2(14)S 12.2(25)S 2 12.0(8)S E (Infra2) 12.2 ICMP Echo X X X X X X X X X ICMP Echo Path X X X X X X X X X SSCP(SNA) X X X X X X X UDP Echo X X X X X X X X TCP Connect X X X X X X X X UDP Jitter X X X X X X X HTTP X X X X X X X DNS X X X X X X X DHCP X X X X X X X DLSw+ X X X X X X X SNMP Support X X X X X X X UDP Jitter One Way Latency X X X X X FTP Get X X X X X MPLS/VPN Aware X X X Frame-Relay (CLI) X X X ICMP Path Jitter X X X APM X X X Source –
  11. 11. Key IP SLA Operations  HTTP – Measure the round-trip time to access a Web page  FTP – Measure the round-trip time to transfer a file  DNS – Measure the DNS look-up time (time to request and receive a reply)  DHCP – Measure the round-trip time to retrieve an IP address  TCP Connect – Measure connection time, which is useful for application and server monitoring  UDP Jitter – Measure round-trip delay, one-way delay, one-way jitter, and one-way packet loss  VoIP UDP Jitter – Measure VoIP call path metrics  ICMP Echo – Measure round-trip delay  UDP Echo – Measure response times between IP SLA nodes using IP
  12. 12. Configuring IP SLA  Command-line options  Configurable via CLI  Easy to setup for a single test  Hard to maintain for large scale monitoring  Automated options  Typically via SNMP  Requires the read-write community string
  13. 13. SCP Question #2 The first 5 correct answers get a free SolarWinds t-shirt  Question – Which network management protocol would be used to analyze top users of bandwidth across a WAN circuit?  Answer – NetFlow
  14. 14. Where to get more help?   
  15. 15. IP SLA Tools Demonstration - Slide 16 -
  16. 16. Summary and Q&A Thank you for attending! To learn more or to download free 30-day trials of SolarWinds products visit: Contact information Josh Stephens, Head Geek twitter: sw_headgeek Blog: p.s. Remember to renew your maintenance!!!