Performance Management for Converged Networks

Download Report

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
www.ITEXPO.com
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
www.ITEXPO.com
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?
www.ITEXPO.com
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.”
www.ITEXPO.com
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?
www.ITEXPO.com
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
www.ITEXPO.com
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…
•
•
•
•
Fine-tune capacity and implement needed upgrades
Investigate and troubleshoot subtle problems
Establish post-deployment alarm thresholds
Establish and implement QoS policies
www.ITEXPO.com
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
www.ITEXPO.com
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
www.ITEXPO.com
VoIP Quality Monitoring
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• VoIP Link Summary
–
–
–
–
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
www.ITEXPO.com
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
www.ITEXPO.com
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
www.ITEXPO.com
Case Study
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Mis-configured QoS causes problem at hospital
•
•
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.
www.ITEXPO.com
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
www.ITEXPO.com
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
www.ITEXPO.com
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.
www.ITEXPO.com
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.
www.ITEXPO.com
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.
www.ITEXPO.com
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
www.ITEXPO.com
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Thank you!!
Brian Wilson
Principal Engineer
NetScout Systems, Inc.
www.netscout.com
www.ITEXPO.com