Port-Security – All Port-Security labbing and verification you could ever want, errdisable recovery demonstrated!

Again this will be a CCNA level review of configuration / verification, and behaviors when things are working and not working, so if you already know this iron clad then skip forward but if you're rusty you may want to stick around. (Errdisable auto recovery will be covered at the very bottom of this post!) … Continue reading Port-Security – All Port-Security labbing and verification you could ever want, errdisable recovery demonstrated!

Port-Security – CCNA Level Fundamentals, verification tables reviewed, and basic configurations explained for review!

^^^Credit to Avalon.com for this picture I found I google images, I just love that picture in regards to Port-Security, I thought it was very fitting to open the section up here 🙂 Intro and Fundamentals of Port-Security As mentioned, this information will be at the CCNA level of knowledge, so if you just passed … Continue reading Port-Security – CCNA Level Fundamentals, verification tables reviewed, and basic configurations explained for review!

NTP Authentication and ACL configuration, odd behaviors explained, and issues to troubleshoot as always!

So to begin this, I apparently completely spaced writing R1 so nothing got saved, and we are back in time again: R1#sh clock *22:38:45.666 UTC Fri Mar 1 2002 R1# So I've decided to go right into Authentication first, as it's fairly straight forward with an odd behavior to note, then continue my battle with … Continue reading NTP Authentication and ACL configuration, odd behaviors explained, and issues to troubleshoot as always!

NTP – Network Time Protocol discussion, configuration, and some NTP / routing troubleshooting as usual!

For this lab I will be using this OSPF Topology, which has the virtual-link to R4 to bring it into the entirety of the network, and to demonstrate how to configure each of these routers so they keep in sync with the entire network via NTP even if their primary time source goes down. So … Continue reading NTP – Network Time Protocol discussion, configuration, and some NTP / routing troubleshooting as usual!

SNMP (Simple Network Management Protocol) Fundamentals, very important configuration notes for exam day!

I will keep this brief and right to the points of SNMP, as it is St. Patricks Day night, and I really don't have any other better plans... I'm just tired from work and its about nap time. That being said, SNMP is a "polling" protocol used to carry network information traffic on UDP port … Continue reading SNMP (Simple Network Management Protocol) Fundamentals, very important configuration notes for exam day!

Router password fundamentals, configuration, a very good brush up on passwords unless you just took the CCNA

I have the above network configured,  but again will just use R1 and R5 for the discussion and examples of router output and configuration, as I am a walking zombie today due to lack of sleep and life stuff. Speaking of life stuff, I said I was thinking about pushing my date out for CCNP … Continue reading Router password fundamentals, configuration, a very good brush up on passwords unless you just took the CCNA