The graphic above shows a VPN Tunnels two modes (Transport and Tunnel), along with how their payloads differ when configured with AH (Authentication only) and ESP (Encryption) on the tunnel, and what protocols correlate with all of it. (After watching the content of the CCIE R/S VPN Technology course, this article more than sums up … Continue reading TSHOOT – GRE DEEP DIVE!!! MTU / Fragmentation / TCP-MSS / PMTUD / Recursive Routing / Interface States / must know information for exam day!
Today the TSHOOT exam cleaned my clock pretty well, and though I'd much rather be posting a Pass grade printout, I'd like to share what I've learned from this experience! I never realized it until I took the TSHOOT exam, but I am "Shoot from the Hip" guy Sitting the TSHOOT exam today has revealed … Continue reading TSHOOT – Attempt #1 – I have found one of the 10,000 ways NOT to pass it! 🙂
I wanted to write a quick post to brain wash myself with right before I walk into the exam room tomorrow to Pass TSHOOT, as this theory has a very good chance of being on the exam in some format, and I have a habit of forgetting things I can't lab. So to cover these … Continue reading TSHOOT – Mnemonic to remember Logging Levels 0-7, Troubleshooting Methods, and Maintenance Models must know for exam day success!
This graphic that I created to help myself understand CEF Hardware Packet Switching is also very similar to the Management Plane vs Control Plane vs Data (Forwarding) plane. Management Protocols run at the Management Plane (hence the name Mgmt Plane) is where Management Protocols such as SSH / Telnet / SNMP / HTTP / HTTPS … Continue reading TSHOOT – Management Plane vs Control Plane vs Data Plane, MPP (Management Plane Protection) review for exam day!
If a trouble ticket pops up for these an issue with these protocols, to know if a protocols port # is not being forwarded correctly, or being blocked by an ACL somewhere, in addition to all the other misconfigurations that might go wrong. For IP SLA, perhaps someone can correct me here in the comments, … Continue reading TSHOOT – Mgmt Tools (NTP / Syslog / SNMP / IP SLA Tracking) review and troubleshooting for exam day!
Notice the tabs to access the Layer 2 / Layer 3 IPv4 / Layer 3 IPv6 Diagrams! I don't know if others are expecting this, but this was a TKO punch when I first opened the first simulation question in Boson, and had no idea what to look at and start pinging. I just cannot … Continue reading TSHOOT – HUGE shout out for Boson Exam Simulator for the 300-135 TSHOOT exam, and of course my study resources!
This will be the BGP Topology you will very likely be working Trouble tickets from on the TSHOOT, it could be iBGP or eBGP, and there is a whole lot of BGP to know even for that! Review of BGP BGP is called a "Path Vector" Protocol that basically is the internet at Layer 3, … Continue reading TSHOOT – Gigantic BGP review, verification commands, and troubleshooting for exam day!
To round off Redistribution series of posts for Dynamic Routing Redistribution, what better way to drive it home, than to Redistribute every Dynamic Routing Domain into every other one and see what we can break? There will be a LOT of output from this lab to demonstrate how to verify and configure / troubleshoot everything … Continue reading TSHOOT – Redistribution Part 5 – The OSPF / EIGRP / BGP / Redistribution lab!
Going back to this above visualization of 2-way Redistribution which is a perfect case use for a Route-Map to perform "Route Tagging" for routes being Redistributed, which assigns tag # values to Routes as they Redistribute and can filter (drop) routes that contain a certain tag value to ensure routes are not re-learned into their … Continue reading TSHOOT – Redistribution Part 4 – Route-Map review, and COMPLETE review of Redistribution issues and Troubleshooting – Must know info for exam day!
I will wrap this up with a look at OSPF and BGP Redistribution, above is a Topology I labbed during ROUTE studies of the BGP MED concept, this is to demonstrate visually the difference of iBGP vs eBGP being the AS that BGP Routers reside in. Troubleshooting Redistribution into OSPF and OSPFv3 OSPF is very … Continue reading TSHOOT – Redistribution Part 3 – OSPF, OSPFv3, and BGP Redistribution review and troubleshooting!
The above graphic is a visual demonstration of how Redistributing routes works, as we are not taking one route from a routing protocol and placing it into another protocol, we are taking routes from the IP table and placing it into "routing protocol data structures" if you remember that phrase. What Route Redistribution is at … Continue reading TSHOOT – Redistribution Part 2 – Detailed review of Redistribution, Seed Metric, RIPv2, RIPng, EIGRP IPv4 and IPv6 behaviors and troubleshooting!
While getting together some command prompt syntax from my lab, I got a jolt of nostalgia from labbing ROUTE, and decided to instead configure the lab Topology shown above as I started configuring my switches for Layer 3 routing and before I knew it I was troubleshooting OSPF and EIGRP Ajdacencies! I will try to … Continue reading TSHOOT – Redistribution Part 1 – Configuring an OSPF / EIGRP / iBGP Lab to completion, ready for Redistribution!
Being that it has been quite awhile since my ROUTE, this will contain a lot of core / foundation concepts, and tie them into troubleshooting as I go. That said, here we go! OSPFv2 (IPv4) review and troubleshooting OSPF is configured with a Process # that is locally significant only "router ospf #" and networks … Continue reading TSHOOT – OSPFv2, OPSv3, OSPF Address-Families, huge LSA / LSDB review, and troubleshooting everything OSPF!
The displayed Topology is just an image from a ROUTE lab I ran through years ago, however most of the Review / Troubleshooting will be reviewed in IPv4 as it is exactly the same in IPv6 mode, literally only difference is the IPv6 Multicast Address. Named Mode EIGRP is a whole nother animal, it should … Continue reading TSHOOT – EIGRP for IPv4, IPv6, and the beast of a topic EIGRP “Named Mode” review and troubleshooting!
There are RIPv2 and IPv6 RIPng posts previously regarding this subject, so I will be Rippng (pun intended) right on through this article, if you type "Rip" into the search function a lot of the articles for RIPv2 will be redistribution and one for RIPng which is very straight forward. However those are more focused … Continue reading TSHOOT – Ripv2 and RIPng review and troubleshooting!