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April 2007
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Archive for April, 2007

Tech Tips: Trunk or Tag? Cisco VLAN Interop

The term “trunking” seems to cause the most confusion whenever I’m working with an accomplished Cisco engineer, and he can’t get VLAN’s to work correctly. ProCurve and most of the networking industry defines “trunking” as a single logical link made up of 2 or more physical links bonded together for the purpose of creating higher [...]

Tech Tips: LACP Log Messages

You may have noticed this message in your switch logs: LACP: Port off line/blocked, then followed by LACP:Port on line, and wondered, what is going on? Why do I see these all over the place in the log? Have no fear…LACP, or Link Aggregation Control Protocol (802.3ad) is a standard based method to logically bond [...]

Tech Tips: IP Preserve

The IP Preserve command is designed for large scale switch roll outs that deploy a template config on the same type of switch. Type up a full config including all settings. The command IP Preserve is manually entered at the end of the config file. Save the config to a text file and place [...]

Why is secure network management underrated?

Are you running telnet, SNMPv2, tftp, syslog for management of your network devices? My question to you is WHY? Your network security is only as robust as your weakest link, and this is a major one. Even if you are using IP authorized managers/ACL’s to control access to these clear text management protocols, you are [...]

Tools page is done!

Phew…I didn’t realize how many tools I use regularly. Comments are appreciated. I’ll update the list when I find cool tools.

Mobile device selections…

One of my clients asked me yesterday what I thought of my BlackJack. Here was my reply:
I like the BlackJack, more than my previous Treo 650.

Pros:
Form factor
3G
Great radio/call clarity
Bluetooth 1.2 for stereo headphones and better sound quality
It’s just cool…

Cons:

Battery life is so-so with 3G on all the time (you can disable it)
No touchscreen
Smartphone versus Pocket [...]

A thousand words

In network security discussions we discuss trust, weakest links, and elements of danger. This pic just shows all of them…in no specific order. Shot going to lunch this week, and yes…he’s sleeping.

Microsoft/ProCurve Security Seminar: NYC, Atlanta, and 2 in Cali

On April 19th Microsoft and ProCurve will be putting on a 4 hour seminar at the Microsoft Technology Center. The seminar will include discussing the ProCurve “ProActive Defense” strategy, and ProCurve will unveil some…new products…oooh! You’ll also see some demos of next gen Microsoft server products, including NAP, Longhorn Server, and Vista… More details and [...]