Tune Up Your Network for the New Year

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Watch the full OnDemand Webcast: http://bit.ly/tuneupnetwork …

Watch the full OnDemand Webcast: http://bit.ly/tuneupnetwork
It’s time to make good on that new year’s resolution. Admit it, in a moment of weakness as the clock hit midnight you resolved to dig in and tune up your corporate network in the new year. Well, the new year is already passing quickly by, so if you haven’t yet made good on that resolution, here is your chance. In these slides from our web seminar, we return to the basics – overall network evaluation, baseline measurements and comparisons, typical yet troublesome network issues, sharing bandwidth in the presence of time-sensitive applications, security, and overall network monitoring and reporting, just to name a few. We focus on practical issues and practical methods for improving the overall health of your network.

In these slides, we will cover:

- Critical elements to consider when evaluating your network
- Common pitfalls and how to avoid them
- Developing and using network baselines
- Optimizing network usage in the presence of competing applications and protocols
- Monitoring and reporting on your well-tuned network

What you will learn:

1. How and where to find the data you need
2. How to automate network monitoring and analysis to ensure the success of your tune up
3. How to quickly diagnose problems when things go wrong

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  • NetFlowNetFlow is a network protocol developed by CiscoProprietary protocol that runs on Cisco IOSNetFlow accounts for all traffic going in and out of the routerTransit trafficTraffic destined for the routerEach NetFlow record contains a wide variety of information about the flowNetFlow never includes the payloads Sampled NetFlow can be configured for use on busy networks – not 100% accurateIPFIXInternet Protocol Flow Information eXchangeAn emerging, IETF (standard) version of NetFlowBased on NetFlow v9Predicted to rapidly become the industry standardsFlowA standard (RFC 3176), sampling-based mechanism to capture network traffic dataApplicable to higher speed networks (gigabit speeds or greater)An sFlow agent compiles flow recordsFlow records are based on Statistical packet-based samplingTime-based sampling of interface countersStatistically based – not 100% accurateJflowSimilar functionality to NetFlow but provided by JuniperData sampled at a globally configured rateStatistically based – not 100% accurateOmniFlowWildPackets proprietary flow analysis and recording mechanismAnalysis of each and every packetNot statistical – 100% accurateSignificantly exceeds the flow records from other mechanismsProvides detailed flow analysis above Layer 3VoIP/VideoApdexCorrelated event analysisCorrelated to packets for instant troubleshooting using deep packet inspection – a complete solution

Transcript

  • 1. Tune Up Your Network
    For The New Year
    Jay Botelho
    Director of Product Management
    WildPackets
    jbotelho@wildpackets.com
  • 2. Agenda
    What to consider
    Resolve to develop baselines
    Common pitfalls
    The network battlefield
    Monitoring for life
    Troubleshooting as a last resort
    Company overview
    Product line overview
  • 3. What To Consider
  • 4. Know Your Network
    Traffic levels per segment
    Mbps?
    Packets per second?
    Packet size distribution?
    Traffic types per segment
    Data?
    VoIP?
    Video?
    Baselines
    Establish and re-establish
    Use automated analysis to identify anomalies
  • 5. Statistics vs. Packets
  • 6. Not All Flows Are Created Equal
  • 7. It’s All In The Packets
    Packets contain vitalinformation not detected
    by flow-based systems
  • 8. Choices and Comprises
    Greater visibility
    Monitoringand troubleshooting
    Single solution
    Integrated, cost-effective
    Packet-based
    Overhead?
    Cost?
  • 9. Key VoIP/Video Issues
    Packet
    Loss
    Latency
    Jitter
    CAMP IT
    Pinpointing the Problem
    9
  • 10. Be Specific
    Where to collect data?
    Real-time or post-capture analysis? Everywhere?
    What data to collect?
    Am I getting all the data I expect?
  • 11. Resolve to Develop Baselines
  • 12. Network Dashboard
  • 13. VoIP Dashboard
  • 14. Application Dashboard
  • 15. A Bit More Precisely …
    Application Response Time
  • 16. Archiving Your Results
    Packets files
    Formatted reports
  • 17. Common Pitfalls
  • 18. 5 Most Common Networking Problems
    Cabling issues
    Connectivity problems
    Configuration
    Hardware malfunctions
    Excessive network collisions
    Collisions are normal and expected
    Early collisions – first 512 bits – recovery automatic (2 – 3 ms)
    Late collisions – recovery 100x longer – eg. NIC stuck in TX mode
    Software problem
    DNS configuration
    WINS configuration
    Duplicate IP addresses
  • 19. The Network Battlefield
  • 20. Data Impacts on VoIP
  • 21. Network Traffic: Quantitative Analysis
    Most network engineers are concerned about the amount of traffic on their networks
    Utilization (percentage of bandwidth)
    Throughput (bits or bytes per second)
    You also need to be concerned about individual utilization components
    How much bandwidth and throughput can be attributed to each application or process?
    Clarifies which application traffic may need to be tuned or controlled
    How well or poorly will the baseline (trended) behavior of each application interact with VoIP
    Don’t forget to also consider the reverse case – VoIP’s impact on existing applications
  • 22. Key VoIP/Video Issues
    Packet
    Loss
    Latency
    Jitter
    CAMP IT
    Pinpointing the Problem
    22
  • 23. Network Traffic: Qualitative Analysis
    The quality of your network traffic is potentially more important than its quantity when it comes to VoIP
    Many traffic streams are “bursty” in nature
    Burstiness my occur over long period of time, or may consist of rapid, recurring traffic spikes
    Prolonged rises in utilization may decrease the number of calls that can occur simultaneously
    Sharp spikes may cause very noticeable quality issues with ongoing calls
    Your baseline monitoring should consider not only averages and long-term trends, but also the short-term peaks and dips that characterize your traffic flow
  • 24. Assessing the Monster's Impact
    While traditional network applications are very tolerant of jitter, latency, and even some degree of packet loss, VoIP is very sensitive to these troubles
    Levels of jitter, latency, and packet loss that would be easily tolerated on a data network can be devastating on a converged VoIP network
    Pre- and post-deployment network assessments are critical
    You must understand your network’s ability to accommodate VoIP
    Current latency, jitter, and packet loss
    QoS capabilities
    Current bandwidth utilization (is there any room for VoIP)
    You must maintain a constant vigil after deployment to watch for imminent troubles
  • 25. The Impact of "Just One More Call"
    Although a network link may be able to support a number of concurrent calls, one additional call is often enough to cause quality problems…
    1st Call
    2nd Call
    x2111
    x1111
    x2112
    x1112
    3rd Call
    x2113
    x1113
    Example: The WAN can support 2 simultaneous calls.
    What happens when a third call is attempted???
    Call #3 Causes Poor Quality for ALL Calls
  • 26. Monitoring For Life
  • 27. Changing Methods - Data Recorders
    Servers
    IDS/IPS System
    Post-incident
    Real-time
  • 28. Strategy for Monitoring 10G Ethernet
    Which of the following apply to your strategy for monitoring 10G segments? (Select all that apply)
    SOURCE:Benchmarking Network and Security Operations: Tools, Processes, and Enabling Technologies Study, 2009, Enterprise Management Associates. n=124
  • 29. 10Gig Network Analysis Workflow
    Identify Key Analysis Pts
    Deploy 24x7 Monitoring
    Alarms/Alerts
    At 10Gig – 24x7 Is Essential
    Problem?
    NO
    YES
    Rewind Data
    Analyze
    Tune if Necessary
  • 30. Troubleshooting As A Last Resort
  • 31. Network Recording,Real-Time Statistics, Forensics Search
    Display TimeLine Graph during capture-to-disk
    Utilization (Mbits/s)
    Packets/s
    unicast/multicast/broadcast
    Packet sizes
    VLAN/MPLS
    Protocols
    Company and Product Line Overview
  • 32. A Picture is Worth a 1000 Words
    A graph of latency, jitter, or packet loss can speak volumes about network health, either for proactive or reactive troubleshooting
    Overlaying this graph with a graph of utilization or total throughput can reveal even more about the causes of VoIP troubles
  • 33. Analyst’s Perspective
  • 34. Visual Expert Provides Proof
    Two requests for data, two quick TCP Acks, but then a long delay before the server sends the requested data
    ACK fast = Network fast
    Then the Data gets returned much later
    Requests and Acks
    Data slow = System slow
  • 35. Company Overview
  • 36. Corporate Background
    Experts in network monitoring, analysis, and troubleshooting
    Founded: 1990 / Headquarters: Walnut Creek, CA
    Offices throughout the US, EMEA, and APAC
    Our customers are leading edge organizations
    Mid-market, and enterprise lines of business
    Financial, manufacturing, ISPs, major federal agencies,state and local governments, and universities
    Over 7,000 customers / 60+ countries / 80% of Fortune 1,000
    Award-winning solutions that improve network performance
    Internet Telephony, Network Magazine, Network Computing Awards
    United States Patent 5,787,253 issued July 28, 1998
    Different approach to maintaining availability of network services
  • 37. What We Do
    Provide network visibility and intelligence …
    WatchPoint, OmniPeek, OmniEngines
    Expert systems – we find the problems for you
    Superior drill-down capability – trouble-shoot from anywhere
    Flexible, customizable, extensible – leverage your investment
    Professional services, training, best practices
    For all network segments …
    Data center to desktop to remote office
    LAN, WAN, Wireless …
    HTTP, Email, Database, VoIP, Video …
    To …
    Network engineers; IT Management; Developers
  • 38. Real-World Deployments
    Education
    Financial
    Government
    Health Care / Retail
    Telecom
    Technology
  • 39. With accurate visibilityinto the network…IT staff can improve:
    End-user Productivity
    Network Performance
    Application Performance
    Security
    Compliance
  • 40. Product Line Overview
  • 41. Product OfferingsSoftware and Turnkey Appliances
    Enterprise Monitoring and Reporting
    WatchPoint Server
    OmniFlow, NetFlow, and sFlow Collectors
    Network Probes & Recorders
    Omnipliance Network Recorders – Edge, Core
    TimeLine Network Recorder
    OmniAdapter Analysis Cards
    Distributed Analysis Software
    OmniPeek – Enterprise, Professional, Basic, Connect
    OmniEngine – Enterprise, Desktop, OmniVirtual
    Portable Solutions
    OmniPeek software
    Omnipliance Portable
  • 42. WatchPointCentralized Monitoring for Distributed Enterprise Networks
    High-level, aggregated view of all network segments
    Monitor per campus, per region, per country
    Wide range of network data
    NetFlow, sFlow, OmniFlow, SNMP
    Web-based, customizable network dashboards
    Flexible and detailed reports
  • 43.
  • 44. Omnipliance Network Recorders
    Captures and analyzes all network traffic at the source 24x7
    Runs our OmniEngine intelligent probe software
    Generates vital statistics on network and application performance
    Intuitive root-cause analysis of performance bottlenecks
    Intelligent data transport
    Network data analyzed locally
    Detailed analysis passed to OmniPeek on demand
    Summary statistics sent to WatchPoint for long term trending and reporting
    Efficient use of network bandwidth
    Expert analysis speeds problem resolution
    Fault analysis, statistical analysis, and independent notification
    Multiple Issue Digital Forensics
    Real-time and post capture data mining for compliance and troubleshooting
  • 45. TimeLine Network Recorder11.7Gbps Sustained Capture
    Fastest network recording and real-time statistical display — simultaneously
    Network statistics display in TimeLine visualization format
    Rapid, intuitive forensics search and retrieval
    Historical network traffic analysis and quick data rewinding
    Several pre-defined forensics search templates making searches easy and fast
    A natural extension to the WildPackets product line
    Turnkey bundled solution
  • 46. Omnipliance Network RecordersPrice/performance solutions for every application
  • 47. OmniPeek Network Analyzer
    OmniEngine Manager
    Connect and configure distributed OmniEngines/Omnipliances
    Comprehensive dashboards present network traffic in real-time
    Vital statistics and graphs display trends on network and application performance
    Visual peer-map shows conversations and protocols
    Intuitive drill-down for root-cause analysis of performance bottlenecks
    Visual Expert diagnosis speeds problem resolution
    Packet and Payload visualizers provide business-centric views
    Automated analytics and problem detection 24/7
    Easily create filters, triggers, scripting, advanced alarms and alerts
  • 48. Key Differentiators
    High-level network monitoring to root-cause analysis
    Single solution for today’s converged networks
    Wired, Wireless, 1GB, 10GB, VoIP, Video, TelePresence, IPTV
    Reduce and even eliminate network downtime
    Automated monitoring 24x7
    Speedy resolution of network bottlenecks
    Improve network and application performance
    Uniquely Extensible Platform – tailored to your needs
    Plug-ins and APIs for integration and customization
  • 49. Thank You!
    WildPackets, Inc.1340 Treat Boulevard, Suite 500Walnut Creek, CA 94597(925) 937-3200