OSPFv3 PtP networks, adding IPv6 addressing on interfaces, and more IPv6 info / configs in general (good stuff)

So this video I am working on now is regarding point-to-point networks, which I didn't think that if I were going from 2-3 with the SW1 between then it would be an "Ethernet segment" however R3 and R4 are directly connected via Fa0/1 so that would be a point-to-point so I may be re-covering the … Continue reading OSPFv3 PtP networks, adding IPv6 addressing on interfaces, and more IPv6 info / configs in general (good stuff)

Hex to Dotted Decimal to Binary conversion explained, and other good info to know for exam day about Hex!

Above is a Hex Conversion Template from an INE video I am watching on conversion, and I really dig the design to full explain it so I am using the same template and wanted to cite INE as the creator of the design (I think?) and for the information on conversion. It is actually used … Continue reading Hex to Dotted Decimal to Binary conversion explained, and other good info to know for exam day about Hex!

IPv6 / OSPFv3 configuration and explanation along the way!

As illustrated above, OSPFv3 (OSPF for IPv6) and OSPFv2 (OSPF for IPv4) can co-exist in harmony on one router, as two completely separate processes, without interfering with each others operation (just like our recent VRF discussion). Being that OSPFv3 is configured on an interface by interface basis, it does not use network statements in router-config … Continue reading IPv6 / OSPFv3 configuration and explanation along the way!

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

IPv6 vs IPv4 Header differences, Address Formatting, Zero Compression, and leading Zero Compression

Above, is seen an IPv6 packet Header, which contains 8 fields: Version: Equivalent to IPv4 Version field - Set to 6 obviously 🙂 Traffic Class: Equivalent to IPv4 Headers ToS (Type of Service) field, used to assign priority levels to packets (QoS) Flow Label: Has no IPv4 equivalence, Labels a packet to be in a … Continue reading IPv6 vs IPv4 Header differences, Address Formatting, Zero Compression, and leading Zero Compression

VRF-Lite: Complete configuration and explanation of behaviors, OSPF and EIGRP demonstration and how they work (or why the don’t work)

To note I used the same color I have previously for IPSec VPN tunnels, however that color is more just one of the few colors not reserved for protocols (as I generally use blue for OSPF, red for RIP, and orange for EIGRP), so this time green is for VRF-Lite. So I wanted to pull … Continue reading VRF-Lite: Complete configuration and explanation of behaviors, OSPF and EIGRP demonstration and how they work (or why the don’t work)

VRF (Virtual Routing and Forwarding) and VRF-Lite theory and initial lab setup (Your CCNA Router on a Stick refresher!)

First I would like to draw the line in the sand between VRF, and VRF-Lite. VRF was created mainly for MPLS VPNs using BGP, so it is beyond the scope of the CCNP R/S, however Lite version uses the same theory and commands (mostly) VRF-Lite is for smaller scale deployment, but uses the same theory … Continue reading VRF (Virtual Routing and Forwarding) and VRF-Lite theory and initial lab setup (Your CCNA Router on a Stick refresher!)

More Intro to DMVPN! Phases descriptions, what NHRP is, a Phase 2 configuration and troubleshooting

This was a misleading Topology in the way that, this describes a Phase 1 DMVPN. There are 3 phases of DMVPN, which are like different series, which has progressively gotten better over time and included more features. This is a list of the 3, and what features they included / lacked: Phase 1 - Hub … Continue reading More Intro to DMVPN! Phases descriptions, what NHRP is, a Phase 2 configuration and troubleshooting

DMVPN – Theory, explanations, and illustrations! (Lab coming up next post)

So I have not been posting over the weekend, however I haven't been slacking either. What I am going to post today is going to be a mixture of information from Chris Bryant's 8 minute DMVPN video, and the few parts I watched from the 8 hours of INE CCNP DMVPN training. INE really goes … Continue reading DMVPN – Theory, explanations, and illustrations! (Lab coming up next post)

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!

IPSec VPN Theory, acronyms, tunnel creation, important concepts (keeping it as brief and to the point as possible!)

As can be seen, I will be adding the configuration for a sweet new IPSec VPN between R1 and R2 in the next post which will be the actual lab session, as there is so much theory and acronym definitions that are important to know and understand that it really just needs its own post … Continue reading IPSec VPN Theory, acronyms, tunnel creation, important concepts (keeping it as brief and to the point as possible!)

Part 6: Troubleshooting of sub-optimal routing via route-maps / redist/ policy routing, and an old friend OSPF distance comes to save the day! (GREAT review!)

Not /fin with this Topology of course, after this lab of fine tuning some sub-optimal routing I am taking copies of all "sh run" to be able to spin this lab up again if it ever gets the "wr er", however it will be /fin for review and onto the subject of VPN's. So, Part … Continue reading Part 6: Troubleshooting of sub-optimal routing via route-maps / redist/ policy routing, and an old friend OSPF distance comes to save the day! (GREAT review!)

Part 5: Turning “IP Routing” on for Layer 3 SW1, Policy / Local Policy Routing, found sub-optimal routing due to AD! (Will be 6th lab to troubleshoot)

I took a quick moment to post before this, advising not to study or lab tired, cause as can be seen towards the end of my Part 4 of this lab I am just tired and swinging at air. Anyway, we now have R1 and R3 both acting as ASBR's, with R1 doing 2-way route-tagged … Continue reading Part 5: Turning “IP Routing” on for Layer 3 SW1, Policy / Local Policy Routing, found sub-optimal routing due to AD! (Will be 6th lab to troubleshoot)

Tips for passing the CCNP ROUTE on exam day and how to study for it!

I am completely revamping this page, after completely having gone through Chris Bryants CCNP R/S video series, and going through all the labbing, as the posts on here clearly show an understanding of each concept. Studying is the first 100 or so posts of my going through the material in my posts once until I … Continue reading Tips for passing the CCNP ROUTE on exam day and how to study for it!