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!
FHRP itself describes different Gateway Redundancy / Fault-Tolerant protocols, that allow for transparent gateway fail-over upon router failure, by using different methods of creating Virtual Router IPs for host gateways. Cisco documentation describes FHRP as being either HSRP or VRRP, cited on their official website here, which I will cover along with GLBP - However … Continue reading FHRP – First Hop Redundancy Protocols intro for the SWITCH exam!
I have cabled up two switches in my 3750 lab to demonstrate some Stackwise configuration / verification / behaviors at the end of this post, however there is a lot of theory before the labbing that is needed for exam day. Stackwise Plus will not be discussed here as it is not in the CCNP … Continue reading Stackwise – Fundamentals, Master election process, configuration / verification / behaviors labbed!
I started freestyle labbing to review some topics, and found some interesting behaviors along the way I wanted to make note of here, so this will be more of a troubleshooting / behaviors demonstration than a configuration of any particular topic. The topic I went with here is creating VLANs local to their respective switches, … Continue reading SWITCH Lab – Manual VLAN Pruning on Trunk interfaces, STP / EtherChannel behaviors, SWITCH and TSHOOT lab!
This is a very basic lab with a lot of concepts / gotchas labbed toward the bottom half of the post, very important behaviors to know for exam day, but as always first the fundamentals and theory that is a must know for exam day! Fundamentals of SVI (Switch Virtual Interface) vs L3 / … Continue reading Multi-Layer Switching – SVI and L3 Routed Port Fundamentals, configuration and verification labbed!
I'll be working between SW1 and SW3 for this lab, as it can work to cover both the lab topics of "EtherChannel Misconfig Guard" as well as Layer 3 EtherChannels, and reviewing some EtherChannel Load-Sharing and testing load-sharing to finish! EtherChannel Misconfig Guard - Hiding in plain sight throughout all these labs! Every … Continue reading STP EtherChannel – BPDU Misconfig Guard, Layer 3 EtherChannel, and EtherChannel Load-Sharing labbed!