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!
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!
I've added SW3 to the Router Group to fully demonstrate all States and behaviors, starting with an overview of the States and leading into an in depth review of each Router State, along with a Timers section worked into the Active State section! Preemption is not completely reviewed in this post, but for context to … Continue reading HSRP – Active / Standby Election reviewed through DEEP DIVE of all HSRP Router States, and HSRP Timers reviewed!
Though there are two physical switches shown with local IP Addresses configured, these represent a single "Virtual Router" as seen by hosts on the LAN, with a single shared IP Address between both devices. Fundamentals of Hot Standby Router Protocol (HSRP) / Operation explained HSRP is a Cisco proprietary protocol defined by RFC 2281, which … Continue reading HSRP – Fundamentals, Version 2 details, a basic configuration / verification of a Standby Group, and some misc gotchas!