Archive for January, 2010

WRR Queue – Parameters

January 26th, 2010 No comments

The 3550 WRR (weighted round robin) scheduler algorithm utilises four configurable queues at each interface of the switch. Let’s consider just FastEthernet ports for simplicity in this post. For each queue, the following important parameters could be configured: Read more…

Categories: CISCO, QoS Tags:

OSPF Costs – Calculations

January 26th, 2010 No comments

Computed cost
Each interface has an associated cost. It is computed as follows: Read more…

Categories: CISCO Tags:

Google Chromium OS – Boot from USB

January 18th, 2010 No comments

Google has an Operating System – watch out Bill Gates!

Google Chromim OS is a large step towards Google taking on Microsoft in the Operating System market.  Google’s OS is a paradigm shift in the OS market, using the internet as your PC.

Hexxah has a release of the Chromium OS which can be installed on and booted from a USB flash drive.

Download it from:

Categories: Open Source Tags:

Permanently delete data from your computer

January 13th, 2010 No comments

Permanently delete data from your computer with a “Government Wipe” standard of removal.  This is to be recommended, especially is you resell your computer. Read more…

Categories: Security, Unix(*nix) Tags:

VTP Version 3

January 12th, 2010 No comments

An aide-memoir, cum cliff-notes:

VTP version 3 differs from earlier VTP versions in that it does not directly handle VLANs. VTP version 3 is a protocol that is only responsible for distributing a list of opaque databases (somewhat like like LDAP!) over an administrative domain. When enabled, VTP version 3 provides these enhancements to previous VTP versions: Read more…

Categories: CISCO Tags:

MySQL in Danger?

January 1st, 2010 No comments


Oracle Finalises deal to acquire Sun
An announcement on their website ( ) states:
“we plan to engineer and deliver open and integrated systems—from applications to disk—where all the pieces fit and work together out of the box.”

(Note the use of small “o” in “Open”)

Help keep the Internet free


“A big part of the Internet is built on LAMP (Linux, Apache, MySQL and PHP/Perl/Python). Now Oracle is trying to buy Sun, which owns MySQL. Read more…

Categories: linux, Unix(*nix), Web Design Tags: