Suppose you have a remote site which connects back to your corporate headquarters via a site to site VPN between two Cisco routers. To ensure the VPN is only established between operating hours, a time based access list can be used. Using the 'time-range' command allows you to set a absolute or periodic time range. Absolute is very specific in…
Category Archives Networking
When thinking about tunnelling, which is encapsulating one protocol with another and then transporting that encapsulated packet across a network, you'll soon see yourself seeing terminology such as Transport, Carrier and Passenger protocols. So what is what? The passenger protocol is the protocol you want to carry over a network that does not understand it (or you do not want the network…
For my CCNP switch studies, I created a CCNP Switch mind map to help remember the key concepts and points for most of the topics covered in the exam. Please click here for the full mind map, and I hope you find it useful. I also have other posts which can be used a quick reference to various protocols or…
I used the INE CCNP Routing & Switching material throughout my studies, and came across a fantastic explanation of Type-1 & Type-2 LSA's, and why Type-2 External LSA's aren't always equal, even though they both create a metric of 20. Source: Understanding OSPF External Route Path Selection