80 posts categorized "Sharkfest" Feed

LMTV Sharkfest | TRANSUM How-To Part 1 - Troubleshooting Network and Application Performance Problems (by Paul Offord)

Live Event Schedule: Wednesday, July 29, 2015 - 9:30 AM

Picture of Paul OffordLMTV SharkfestIs it the network or isn’t it?

Upon popular demand, +Paul Offord is giving us a re-run of his well attended SharkFest 15 session, which covers performance analysis theory and the practicalities of using the TRANSUM free plugin for Wireshark.

The purpose of this two-part LMTV presentation is to look at how network engineers can use TRANSUM to quickly analyse a slow response time problem and produce concrete proof of the cause.

Specifically, in Part 1, Paul will cover the concept of Request-Response Pairs, the RTE Model for measuring response times and the shortcomings of the standard Wireshark “Time from request” measurements.

Paul has had a 37-year career in the IT industry that includes roles in hardware engineering, software engineering and network management. Prior to founding Advance7, he worked with IBM, National Semiconductor and Hitachi Data Systems. Paul is leading a project called TribeLab with the objective of promoting evidence-based troubleshooting to the IT industry. TRANSUM is one of the first outputs from the TribeLab project.

To help us build our community, please share this live event with your fellow professionals on LinkedIn. For more episodes of LMTV, please visit LoveMyTool.TV or Sharkfest.TV.

For more episodes of "LMTV TribeLab", please visit http://lovemytool.tv/tribelab.

LMTV SharkFest | Packet Capture Techniques (by Paul Offord)



Picture of Paul OffordLMTV SharkfestThere was a time when capturing packets was straightforward; set up a mirror or SPAN port, connect the analyzer to the destination and away we go. Now life is much more complex.

We have blade servers that include switches, VMs chatting via Virtual Switches and the older issue of capturing traffic between two programs running on the same operating system. In this session, we cover the tips and tricks that enable us to get those lovely network packets. We look at what works in an enterprise environment and what you should avoid.

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LMTV SharkFest | Packet Matching (by Paul Offord)


Picture of Paul OffordLMTV SharkfestWith the ability to capture traces along the path from user to server comes the advantage of narrowing down a problem to a particular area of the network.

Whilst matching identical packets may be fairly straightforward, it gets complicated when the traffic passes through firewalls, load balancers and proxies.

In the first of my SharkFest presentations, we covered tips and tricks to match packets as that flow from PC to server and back again.

In the following presentation I explain four different strategies to match packets so that we can deal with challenges such as:

  • NAT and PAT
  • VIPs
  • SSL especially with load balancers
  • Increased traffic volumes seen deeper into a system
  • Capture time sync inaccuracies

I illustrate the strategies and various techniques with Wireshark examples.


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Sharkfest 2015 Retrospective – Another Great Year! (by Chris Greer)


Instructor Selfie 2015_Sharpened

LMTV SharkfestInstructor Selfie at Sharkfest 2015 - Sorry for the grainy pic. 

Sharkfest 2015 has come to a close, and what a fantastic conference it was. Three full days of capture tips, packet shredding, case studies, and analysis methods from some of the best analysts in the business. If you are excited about packet analysis and troubleshooting with Wireshark, this conference should be on your must-attend list for next year. There really is nothing like it. Within the next few weeks, recorded sessions will be made available on the official Sharkfest retrospective page, located here - http://sharkfest.wireshark.org/retrospective.html

Some of the highlights from Sharkfest 2015:

Packet Capture Challenge

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LMTV Sharkfest | How Taps Enable 100% Network Visibility (with Chris Bihary)

Live Event Time: Thursday, June 18, 2015 - 9:00 AM PST

LMTV SharkfestWhy are we still talking about network TAPs?

Because network visibility is important and taps are what experienced and battle scarred network engineers turn to for a full unabridged view of their mission critical networks.

BiharyJoin us this Thursday and learn more about 100% Network Visibility from +Chris Bihary, co-Founder of +Garland Technology, and the godfather of Taps versus Span Ports, +Tim O'Neill for yet another lively discussion.

Chris is a sponsor and will be at the +SharkFest Wireshark Developer and User Conference to show you how TAPs will help you save your network and the data you MUST protect!

Please join us with this live event and participate with Q&A.

To help us build our community, please share this live event with your fellow professionals on LinkedIn. For more episodes of LMTV, please visit LoveMyTool.TV.

LMTV Sharkfest | Wireshark and Taps - Best Double-Shot for Mission Critical Networks (with Tim Crofton)

Live Event Time: Wednesday, June 17, 2015 - 9:30 AM PST

LMTV SharkfestTim crofton With +SharkFest Wireshark Developer and User Conference less than a week away, this Wednesday LMTV will be bringing you Datacom Systems, a sponsor of both Sharkfest and LoveMyTool.

Specifically, +Tim Crofton will be talking about how taps and +Wireshark could be used together to best protect your mission critical networks and how the combination would improve application visibility and network performance.

While Wireshark’s open source network protocol analyzer capability allows you to decode packet communication through your network to identify problem areas, inserting a network tap into your network would provide access to your data without having to set up port mirrors on your Ethernet switches or routers.

Please join us with this live event and participate with Q&A.

To help us build our community, please share this live event with your fellow professionals on LinkedIn. For more episodes of LMTV, please visit LoveMyTool.TV.