In this post I will demonstrate how we can find out which of SW3’s switchports PC1 is connected to in the topology diagram below. To make things more fun though I’ll begin my search from R1. Note that apart from R1 and PC1’s IP addresses, we do not have nor need any other information such as intermediate device IPs or port numbers in order to g...
To properly administer an EIGRP network an admin really should know how EIGRP calculates and chooses best paths. If you’ve read any CCNA or CCNP resource you’re probably thinking “that’s easy, EIGRP uses Bandwidth and Delay by default”. And you’re completely right. However, how do these two pieces of information actually influence the resulting ...
I thought I’d write up a quick blog post to celebrate the fact that NetApp Insight is around the corner! If you haven’t seen them already you can find my NetApp posts here. To jump directly to my “NetApp From the Ground Up – A Beginner’s Guide” series of posts click here. Finally, keep an eye on my Twitter account (@OzNetNerd) and the #NetAppA...
After publishing my previous post, I received another e-mail from the author of the original e-mail: … So basically, I would like to find out how to find the first usable IP address. As I say, using your process, I can figure out the Network IP address, and the Broadcast IP address, but I don’t know how to figure out the first usable IP. I was...
Recently I received the following e-mail from a reader: I have read, and followed your method of finding subnet mask addresses, and calculating the first and last and broadcast addresses, but there is something that I would like to ask. I can follow the “normal” /30 method, using borrowed bits from the fourth octet, but I find it difficult to ...