Multicast Listener Discovery (MLD) protocol is well hidden deep in the bowels of IPv6 protocol stack and most of us tend to gloss over it when we discuss IPv6 neighbor discovery process… until MLD raises its ugly head to bite an unsuspecting network administrator.
The problems with MLD are not new (and I wrote exhaustively about them a while ago), but it’s always nice to see other people raise awareness of broken IPv6 features like Enno Rey and his security team did during the IPv6 Security Summit (part of Troopers 15 conference).
Read more ...Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
The post describes the process of how to upgrade the IOS / Software on a Cisco 4500X switch. I will not be covering how to do a hitless upgrade using ISSU with 2 switches in a VSS pair. This process is performed on two switches which are not in production. So to perform the upgrade... [Read More]
Post taken from CCIE Blog
Original post How to Upgrade IOS on Cisco 4500X Switch
In this post, I dive deep into 802.11 medium contention to understand how it works as a precursor to the final blog post in this series where I’ll detail the two main sources of medium contention, identify Wi-Fi's breaking point (that'll be fun, stay tuned) and how this affects proper WLAN design in order to optimize wireless networks to prevent medium contention from killing your WLAN performance.
Read the full blog post over on the Aruba Networks Tech Blog...
This is the third blog post in a series about WLAN capacity planning. Be sure to read the first and second posts.
Cheers,
Andrew
This post is just a quick response to a comment by Turing Machinæ on Show 227 – OpenStack Neutron Overview with Kyle Mestery, which was “I’ve learnt absolutely NOTHING about openstack from this podcast.” Whilst I don’t agree I have some empathy; time and time again I’ve found myself hitting a brick wall recently when […]
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Centec enters the 10G age with its newest switch chip.