Sunday, October 22, 2006
NEWS: Network Performance Management Training & Certification to be Offered by NetPerformance.com NetPerformance.com is offering two levels of PMG NetAnalyst® training and certification classes in November, to be held in Austin, Texas. NetAnalyst is a comprehensive, vendor-neutral training program -- ranging from networking essentials to advanced network analysis -- designed to enable network professionals to understand how systems interact, how to best use analysis tools for fault and problem isolation, and how to optimize network performance.
PERFORMANCE TOOLBOX: NetStumbler As WiFi continues to turn up in unusual ways (such as IBM's/Xing's Kyoku-NAVI wireless karaoke machines) locating these devices becomes increasingly necessary. From the system administrator perspective, there may be a rogue 802.11 device operating outside of administrative policy; from the adventurous spirit viewpoint, there may be an opportunity to observe and perhaps utilize 802.11 bandwidth on an access point that remains unsecured. Spotting them for either agenda requires nothing more than an 802.11 adapter and the relevant configuration program, but you will glean only so much viable information using standard issue desktop applications contained on companion driver and installation disks. You can stumble your way through the wireless bubble and determine more usable information with NetStumbler.
TECHNOLOGY BRIEF: WLAN Performance [WLAN connections] are prone to interference and attenuation (degradation of signal) from building materials and other electronic devices that may use similar frequencies (such as cordless phones, Bluetooth devices, or microwaves). The further away a wireless user gets from a wireless access point (WAP), the more likely they are to be affected by attenuation and interference. But unlike a radio station’s audible signal, data that gets lost on a wireless network typically must be retransmitted, if only because most networked applications use Transmission Control Protocol (TCP) for transport. Retransmission of lost data also impacts performance, and reduces overall throughput for user application(s).
FLUKE NETWORKS: Wireless Site Survey Best Practices As wireless technology continues to mature, new wireless applications and appliances continue to emerge. There is increasing demand for transmitting voice and video, as well as the need for accurate positioning of users and assets accessing the WLAN. Site surveys are invaluable for designing and optimizing WLAN networks to support these applications. This paper, posted on SearchNetworking.com and sponsored by Fluke Networks, provides insight into best practices for executing wireless site surveys.
DEVELOPER'S CORNER: At Your Service or How to Make the Most of Your Web Services "Web Services" has become the hot new "buzzphrase" on development radar screens these days. It seems as though everybody is talking about them and everyone from a small start-up blogger who codes a simple REST-based feed to a development shop stuffing SOAP and XML into every developer's toolbox is working with Web Services in some way. Web Services have become a hot, popular topic in development shops and for good reason.
Wednesday, October 18, 2006
Way back in 1995, Network World used the economic metaphor of inflation to report The Cost of Network Complexity. While 1995 might be considered the Paleozoic era of networking -- Windows NT was barely two years old -- and the technologies have since rapidly evolved, still the inflation metaphor holds up today.
"The cause of economic inflation is too many dollars chasing too few goods, diminishing the buying power of the dollar. In the case of network complexity inflation, we have too much network infrastructure being chased by too few network wizards. Net service quality (the currency provided by the support staff) declines because it is spread across too many service demands.
"When this occurs, there are two means of bringing service quality and service requirements back into balance: reduce the number of factors contributing to the complexity [NPD Editor's note: That's not going to happen.] ... or increase the size of the support staff to handle the increased complexity. [Nope, that's not happening either]"
Flash forward to today and it's clear that infrastructure tools have progressed over time, making enterprise networks more reliable in the process. However, increased reliability doesn't necessarily mean better performance and it doesn't necessarily mean a better experience for the end-user. Today users commonly expect a ubiquitous and instantaneous network. They want it now, anywhere at anytime.
Therefore, network engineers aren't getting much sleep!
Here are three big trends that have increased the volume and complexity of wide area network traffic, made monitoring application performance a necessity and sleep for network engineers a luxury:
Continue reading "Three Big Trends Affecting Network and Application Performance" »
Wednesday, October 18, 2006
According to Neal Weinberg at Network World magazine, Gartner analysts Mark Fabbi and Bob Hafner argued that IT and network engineering departments will “waste an estimated $100 billion over the next three years by overspending on network products and services.”
He [Fabbi] expanded on that premise this week to argue that network execs should only buy what they know they will need for the next two years, rather than buying more than necessary, just in case network requirements grow. More often than not, "just in case never comes," Fabbi said.
Continue reading "A waste of $100B" »
Monday, October 16, 2006
Over the last several years IT organizations worldwide have spent billions of dollars implementing fault management tools and processes to maximize network availability. And now thanks to these investments and more reliable technologies, most enterprise and service provider networks operate with 99.9 percent uptime or better. So why do many IT organizations continue to focus their management resources on managing that ".01" percent of downtime?
Continue reading ""Most of the Time" Deserves Most of the Attention" »