IPv6: Address types, Prefix-types you must know, Auto-Configuration

I am going to run through all the as brief as possible, so hold onto the seat of your pants. First up, EUI64: Every interface enabled with IPv6 on a Router needs a unique identifier, called an interface identifier, which uses what is called an EUI64 (Extended Unique Identifier). The 64 bits does not refer … Continue reading IPv6: Address types, Prefix-types you must know, Auto-Configuration

Complete guide to Basic IPSec VPN Configuration, explanations of concepts, debugs, and some show commands for tshooting issues!

Working from Sw1, I want 172.12.23.0 /24 traffic to initialize and be encrypted to the 5.5.5.5 /32 network when traffic hits R2, and vice versa from 5.5.5.5 /32 configured on R1. I want my traffic from this switch specifically destined to network 5.5.5.5 /32 to take the path of R2 - R1 - R5 and … Continue reading Complete guide to Basic IPSec VPN Configuration, explanations of concepts, debugs, and some show commands for tshooting issues!

Intro to Policy Routing (PBR) and Local Policy Routing, new Topology soon!

  This will be the intro to the pointers or theoretical stuff to know before diving into configuration and troubleshooting. On Chris's initial Topology he has 3 routers connected on one common subnet, so I will need to review the configuration's to understand what the actual networks are or if there is a reason he … Continue reading Intro to Policy Routing (PBR) and Local Policy Routing, new Topology soon!

Part 3: Troubleshooting the NBMA problem before it drives me bonkers

A very frustrating end to my labbing last night ended with myself not being able to ping from spoke R2 to R3 and likewise, and I called it for the night earlier on, but went back to it as I wanted to see what broke it. So first I turned off the interface running OSPF, … Continue reading Part 3: Troubleshooting the NBMA problem before it drives me bonkers