Just a quick post to show how one can compared what is in the startup-configuration compared to the running-configuration or to compare to different configurations stored on flash on Cisco devices. The device boots up with the startup-configuration. Then we
Cisco Learning Network VIP 2014
I have been selected to join the Cisco Learning Network VIP program for 2014. I’m very happy and proud to join this program as I like to give back to the community. I try to do so by answering questions
Merry christmas – and some of my plans for 2014
I would like to wish everyone a happy christmas and a happy new year. 2014 is going to be a big year for me and I would like to describe some of the things that I plan for 2014. I
CCIE RS v5 – My Thoughts
When is the Update Coming Finally the announcement is here, CCIE RS v5 is going live on June 4, 2014. That means that the last day to take both the written and the lab for v4 is June 3, 2014.
EIGRP Network Design
Introduction Enhanced Interior Gateway Routing Protocol (EIGRP) is a routing protocol developed by Cisco based on the DUAL algorithm. EIGRP was previously proprietary but has recently been opened up by Cisco with an IETF draft. EIGRP has been accused of
Cisco Flex link
Introduction Flex link is a Cisco solution which replaces STP in certain network topologies. It works by detecting link down on a primary interface and then bringing up the backup interface that has been defined as backup. It is most
Resilient Ethernet Protocol (REP)
Introduction I’m writing a short summary of REP as part of my CCDE studies. REP is an alternative protocol used in place of STP and is most often run in ring based topologies. It is not limited to these topologies
Sign up for ipSpace webinars and get a 20% discount
I posted about ipSpace webinars a couple of days ago and Ivan has kindly agreed to provide a 20% discount for the readers of this blog. Follow this link to sign up for the yearly subscription at a 20% discount.
IPSPACE Webinars with Ivan Pepelnjak
Introduction Want to learn more about data center networks? How do you scale a data center? How do you deploy IPv6 in the real world? What are overlays and which protocols can be used to create overlays? If these kind
Cisco VIRL – Let’s go viral!
Cisco VIRL Most of you have probably heard something about VIRL already. There were some rumors going around and then at Cisco Live, Joel Obstfeld from Cisco did a demo of Cisco VIRL. VIRL is a tool running on Openstack