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Learn strategies for detecting and resolving network performance issues efficiently. Explore tools, methods, and best practices for proactive network management. Ensure smooth operations without disruptions. Improve user experience and optimize network performance.
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E2EP: Current & FuturesGroup 6 Breakout Results Recorded by Matt Zekauskas
Group 6 • Scott Friedrich, GA Tech • Deborah Davis, GA Tech • Matthew Almand, TAMU • Scott Douglas, Goddard • Peter Olenick, Princeton • Matt Zekauskas, stuckee
How do you know the network is working correctly? • No calls! • Would like to detect in advance…
Today’s Problem Focus • Most performance problems are with “traditional” applications, not “advanced” applications. • Ex: Peoplesoft • Calls through help desk • “It was working yesterday, now it’s 50% slower”
Steps • Compensate for user expertise… what is the real problem? Sometimes don’t know Sometimes users don’t know endpoints • 2. Is it really a network problem? [on-demand] NetOut to TCP discard port NetIQ endpoints Traceroute observatories/ LookingGlass Abilene router proxy [traceroute/ping]; AMP Passive! [e.g., Old Network General Sniffer]
Other Systems • Openview for main network fault detect • MRTG • Roll-your-own test points (periodic tcp tests) – “strategically deployed systems” • Roll-your-own flow analysis • Netscape to X (general reachability)
Other Problems • Going directly up mgmt chain • Get directives to fix immediately w/no other data • Don’t want to hear “it works for me” (end up working with application) (“prove”) • Unreasonable expectations (OC48 out of OC12) • Way to tell what’s reasonable out of path?
Other Problems • Users don’t understand firewalls, “tcp” wrappers • I1, once verify campus ok to edge & symmetric routing, can’t do any more • Ability to trap transient problems
Net Resources • General web searches • CERT site
Missing Tools • Pervasively deployed helper on endpoints • Button user can push to see if it’s really a network problem, and if so give data that would be useful to solve [FPT?] • Tell users if over Internet2 / Expectations • Something to highlight problems before user calls
Characterization • Classify traffic, at department level • Help performance by providing knowledge about non-mission traffic where feedback might result in controls • Privacy obviously an issue… top destinations without noting sources • Ability to shape here (e.g., packeteer) being deployed
On E2EPI Tools • Lots of commercial solutions claim to be in this space: Tivoli, HP Openview, CA Netcenter, (NetCool),… ; adapt rather than start from scratch
Finding People • Maintained list of contacts at other campuses • DNS model (update locally) OK • Need access when network is dead • Automate 1-on-1 contact with other net managers? Especially getting credibility w/remote. • Ability to get all key contacts on phone call? (perceived as easier w/ Internet2) • Single contact/institution may be insufficient • Vendors: around 1st line support?
Knowledgebase • A healthy skepticism… • Require keywords; but provide? – avoid search & get something irrelevant • Refineable searches • Various manefestations point to same problem • Contacts for “interesting” problems • Include other R&E network info (ESNET…)
User Education • Educated users very valuable for problem resolution… • Materials from Internet2 applied locally? • Anything in I2 participation agreement?
