EIGRP – Quick review of EIGRP Named Mode, walk through of “Named Mode” EIGRP Configuration with Authentication across the entire EIGRP AS 100 Domain!

Using this Topology I will work across the EIGRP Domain using EIGRP Named Mode, possibly mixing some "Classic" mode EIGRP Routers in there as well, just to see how things are different once I've gotten into a Named Mode groove of configuration. Honestly before running through this lab (when studying for my CCNP R/S) I … Continue reading EIGRP – Quick review of EIGRP Named Mode, walk through of “Named Mode” EIGRP Configuration with Authentication across the entire EIGRP AS 100 Domain!

DMVPN – Configuring and applying an IPSec Profile to DMVPN Tunnel interfaces, NHRP Auth config, and troubleshooting commands for IPSec!

Drawing up IPSec Profiles to secure the DMVPN Network is honestly as easy as pictured above, though in modern networks there would be much stronger passwords, and most likely multiple profiles that would be deployed at different branches in the event one IPSec Profile were to become compromised. While troubleshooting my branch office deployment I … Continue reading DMVPN – Configuring and applying an IPSec Profile to DMVPN Tunnel interfaces, NHRP Auth config, and troubleshooting commands for IPSec!

HSRP vs VRRP vs GBLP – All Default settings, Authentication, and important quick notes for Exam day!

Wanted to jot down some bullet point style notes as to the differences between the 3 FHRP's that you will see on exam day for SWITCH, and a few things you may also see on ROUTE at the bottom for Authentication and creating "Tracking objects" to increment and decrement values of the different Priority #'s … Continue reading HSRP vs VRRP vs GBLP – All Default settings, Authentication, and important quick notes for Exam day!

HSRP – Election Review, Preemption, Interface Tracking, Multiple HSRP (MHSRP) Load-Balancing, and Authentication!

The above Topology will be configured in the bottom section for MHSRP / Load-Balancing, but first a quick review of the HSRP Active / Standby election, followed by Preemption and Interface tracking. HSRP Election Overview The election specifically for the "Active Router" only happens upon initial bootup of the Router Group, if the Active Router … Continue reading HSRP – Election Review, Preemption, Interface Tracking, Multiple HSRP (MHSRP) Load-Balancing, and Authentication!

EIGRP: Named mode, a whole new type of EIGRP mode, with all new configurations and explanations including “address-family”s!

We will stick with the same old Topology to finish EIGRP review off, I have one more article after this, then I really need to double time some other topics before exam day to freshen up the ol' steel trap! Now a couple of things that separates "Original mode" from "Named mode" EIGRP is: It … Continue reading EIGRP: Named mode, a whole new type of EIGRP mode, with all new configurations and explanations including “address-family”s!

Part 2: Deep Dive into EIGRP / OSPF / RIP Authentication, Route Summarization, OSPF troubleshooting to end lab!

Tonight I had a whole agenda of tasks to configure as much as I could on this network, however I was only able to demonstrate authentication configuration for all 3 protocols thoroughly, create a Summary Route for R5, and troubleshoot an OSPF issue that was a bit tricky to catch but finally got it (which … Continue reading Part 2: Deep Dive into EIGRP / OSPF / RIP Authentication, Route Summarization, OSPF troubleshooting to end lab!

OSPF Authentication Configuration

This will be brief, as there is not a whole lot to OSPF Authentication, just a few good to know debug / verification commands and a few commands to configure the authentication itself. ***One thing to note before going into the commands to configure the authentication itself, it will always require two commands, one to … Continue reading OSPF Authentication Configuration