Transcript Performance Management for Converged Networks

Performance
Management
for Converged
Networks
Today’s Focus
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Converged network challenges
• Meeting the challenges throughout Lifecycle
- Assess
- Plan
- Verify
- Monitor
• Summary
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Convergence Challenges
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Primary Business Concern
– High level of expectations surrounding voice services
• Technical
– Adding complexity to already very complex enterprise
networks
– Voice traffic competing for existing network resources
– Voice is a real-time application, i.e., sensitivity to delay,
jitter and packet loss
– Setting appropriate traffic prioritization (QoS) to ensure
VoIP and other mission-critical applications are delivered
properly, providing the best user experience
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Management Lifecycle
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Assessment
– Have you baselined your network? Is it ready for
Voice?
• Planning
– Have you made all necessary decisions to ensure an
effective rollout?
• Impact analysis
– Is everything running as smoothly as planned?
• Ongoing management
– How is your network changing and growing over time?
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Step One: Assessment
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Is your network ready for Voice?
• Create an inventory of all applications on the network
– Needed for creating QoS policies and making capacity and usage
policy decisions
• Evaluate bandwidth to ensure capacity for Voice
– Understand network utilization to determine areas with too little
capacity
– Identify how business sites use network resources
• Baseline the response time of key business applications
• Audit the network for subtle, systemic problems
– Identify issues that may impact a VoIP deployment
“No matter how well architected your network is,
once voice is added, any idiosyncrasy is bound to appear.”
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How does business use the network?
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Do you know all the applications running on your network?
Application visibility provides business
justification for IT decisions:
Are there good reasons for an upgrade?
Are there non-business uses of the network?
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Baseline RT of key business apps
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
A pre-deployment snapshot of response time
can be used as a comparison post-deployment
to ensure voice does not negatively impact
delivery of key business applications
Response time provides insight into the end-user experience and should be an
integral part of any performance management tool
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Step Two: Planning
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Have you made all decisions to ensure an effective
rollout that minimizes the impact on end users?
Based on gathered data…
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Fine-tune capacity and implement needed upgrades
Investigate and troubleshoot subtle problems
Establish post-deployment alarm thresholds
Establish and implement QoS policies
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Fine-tune capacity, implement upgrades
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
What applications contribute to capacity?
• Eliminate undesired traffic
• Reschedule processes
• Redistribute load
• Add new bandwidth where required
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Step Three: Impact Analysis
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Is everything running as smoothly as planned?
• Confirm voice configuration and quality
• Confirm QoS configuration and success
• Determine whether voice and bandwidth utilization
estimates meet with actual data
• Re-evaluate response time of critical applications
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VoIP Quality Monitoring
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• VoIP Link Summary
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Counts for all calls & calls failed
Packet loss
Average and peak jitter
Average and lowest MOS value
• VoIP Call Detail Records
– Name and IP address of
initiating & receiving devices
– # of calls
– # of calls failed
– Average connect time
– Talk time
– Packets lost
– Average jitter
– MOS
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Validation
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Is voice being delivered as designed?
Monitor call jitter, packet loss percentage, and setup times to confirm voice performance
Validate codec and voice traffic prioritization configurations
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Validation, continued
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
QoS configurations set correctly?
Applications that have been assigned a
wrong DSCP will be quickly identified in
this view and will make pinpointing the misconfigured device much easier
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Case Study
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Mis-configured QoS causes problem at hospital
•
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500 bed hospital in the
Western U.S.
VoIP pain point:
– Whole wings of the hospital
would intermittently deregister
and lose telephone service
•
Thought bandwidth was an
issue
– Put VoIP on own VLAN
– Turned off multicast backups
– Problem persisted
“If you can solve this
problem, we can prove
your value”
VoIP MIB demonstrated
mismatch in QoS for RTP
voice
– Inbound class was 46;
outbound was 0
Reconfigured routers &
problem resolved.
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Step Four: Management
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
How is your network changing + growing over time?
• Converged networks need unified performance management
• Continuation of the tasks you performed in assessment and
post-deployment impact phases
• Early warning of pending issues
• Communication to key constituents
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Need For Unified Management
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Context to performance problems enables faster troubleshooting: Voice
doesn’t exist alone on the network. Make sure your performance management
solution can display needed information side-by-side
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Advanced, Early Warning
Catch changes in network behavior before they affect the business:
Detect increases and decreases in link and application utilization, application
response time, VoIP quality, and unknown applications.
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Capacity Planning
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Long-term views provide trending information: Monitor the “Over
Time” views to gain an indication of voice quality degradations and to
facilitate more accurate capacity planning.
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Robust Reporting
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Live, web-based Workspaces
for intuitive troubleshooting.
Navigate with a right-click.
Publish most-/leastsummary articles and
custom reports. Drilldown from a NewsPaper
article into a live
Workspace.
Intuitive reporting:
Customize reports to
reflect individual
needs. Multiple levels
of granularity from
high-level summaries
to meticulous details.
Create on-demand reports
from customized
Workspaces and publish to
NewsPapers. Annotate,
rename graphs for
business audiences.
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Benefits
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Unified information to lower TCO and optimize IT staff
productivity
• A business perspective of converged, global networks
• Improved delivery of networked applications and services
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Thank you!!
Brian Wilson
Principal Engineer
NetScout Systems, Inc.
www.netscout.com
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