Cisco VIRL is a great tool but it is artificially limited to a maximum of 15 nodes today. I have created a petition to collect names to send to Cisco, to show that the community really wants to increase this
Interview with CCDE/CCAr Program Manager Elaine Lopes
I am currently studying for the CCDE exam. Elaine Lopes is the program manager for the CCDE and CCAr certification. I’ve had the pleasure of interacting with her online and meeting her at Cisco Live as well. The CCDE is
QoS Terminology – Comparing Cisco to MEF and RFC Terminology
Have you every thought that you knew a topic pretty well but then someone uses terminology that you aren’t used to? People that use Cisco a lot or live outside the MEF world use another terminology than people that are
Using BFD to Track WAN Status and Change HSRP Priority
It’s been five years since I started this blog! Time flies and a lot has happened since. Thanks for being along for the ride. What better way to celebrate than a blog post? This post is going to be short
IPv6 Multicast
These are my notes for IPv6 multicast for the CCDE exam. Overview Prefix FF::/8 reserved for multicast Multicast Listener Discovery (MLD) replaces IGMP MLD is part of ICMPv6 MLDv1 equivalent to IGMPv2 MLDv2 equivalent to IGMPv3 ASM, SSM and Bidir
Service Provider IPv6 Deployment
These are my study notes regarding IPv6 deployment in SP networks in preparation for the CCDE exam. Drivers for implementing IPv6 External drivers SP customers that need access to IPv6 resources SP customers that need to interconnect their IPv6 sites
Coming Updates to the CCIE Program
With everything going on in the industry, what is happening to the CCIE program? I recently watched a webinar on coming updates to the CCIE program. I have also been talking to the CCIE and CCDE program managers which I
Design Considerations for North/South Flows in the Data Center
Traditional data centers have been built by using standard switches and running Spanning Tree (STP). STP blocks redundant links and builds a loop-free tree which is rooted at the STP root. This kind of topology wastes a lot of links
Introduction to Storage Networking and Design
Introduction Storage and storage protocols are not generally well known by network engineers. Networking and storage have traditionally been two silos. Modern networks and data centers are looking to consolidate these two networks into one and to run them on
CCDE – Next Generation Multicast – NG-MVPN
MVPNs have been lacking support for MPLS encapsulation. NG-MVPN supports the use of MPLS encapsulation and provides a lot of different profiles. When is a profile suitable and which one should you choose?