• There are lots of articles and resources around the internet on IPv6 – especially since World IPv6 Day is today. Rather than recap them here, I thought I’d share a few of the less frequently...

  • When the probe packet arrives at R1, per RFC 1812 (section 5.3.1), that router will decrement the packet’s IP TTL. Since the TTL in the probe packet was one, after being decremented the TTL will...

  • I fly around the country frequently and meet a lot of people who use Wi-Fi. The consensus, I find, is that it’s a great technology with a few frustrating things. Sometimes it goes out, sometimes...

  • The folks at Wireshark announced a new web site today designed to help support Wireshark users. The site, at ask.wireshark.org, allows anyone to post questions they have about Wireshark features, protocol analysis, or Wireshark development.

  • The latest upgrade to the family of IEEE 802.11 standards is identified as IEEE 802.11n. Users of this new process will notice two improvements with this improved wireless technology. They will find that significantly greater speeds and ranges can be achieved over the existing standards. Specifically, 802.11g products, which have a theoretical maximum throughput speed …   Read More

  • Last October I wrote a number of posts discussing the basics of wireless LANs, along with the associated frequency spectrums, security standards, and security vulnerabilities. The wireless networking process, defined through the IEEE 802.11 set...

  • Question: I am in the process of moving a LAP to another network, but it only remembers the old controllers it was connected to. Can I clear previously saved controllers from my LAP? Answer: During the...

  • As discussed last time, the failover priority feature has been available since controller firmware version 5.1 but is disabled by default. Since it only engages when the controller sees additional association requests over and over...

  • A few years ago, I made the mistake of trying to fly home the weekend before Christmas. It was one of those travel days that made my road warrior senses go into high alert, but...

  • Security is a vital consideration when planning, designing, implementing, and managing any type of network infrastructure. This is especially true for wireless local area networks (WLANs), which present a unique set of challenges to both...