I have been working in enterprise networking for ~5 years now. I'm in the military and finally decided to try acquiring my CCNA here soon. I have been able to do every single lab leading up to this point without assistance. This one was quite difficult, but I was able to configure both sides by only googling the GRE tunnel creation commands for assistance. A neat trick you can use to track whether your tunnel is working is to run a continuous ping using "ping -t" or "ping -n x" from one of the office PCs pinging the other office PC. Then, issue a "show interface tunnel x" and if you spam that show command repeatedly as the continuous ping runs, you'll notice the packet input counter going up if the traffic is properly being tunneled using GRE. Great lab Jeremy!
Edit: Another cool method I forgot about is running a traceroute on the office PCs to one another. You'll notice the ISP hops aren't included in the traceroute and instead it's replaced with the tunnel IP as the intermediary hop.
I just took my first practice exam with boson and scored 636. I haven’t finished the course yet I’m on this video but I’m pump that I got this score. I hope to get on y’all’s level.
Hi Jeremy, nice video. It would be beneficial to mention that the source/destination tunnel addresses must be routable addresses! I've seen some misleading videos where a loopback interface is being used with a private IP address, of course this will work in a lab if the network's are added to the routing processes however in the real world it won't. The addresses must be public, the tunnel interface however is private. Shame you didn't show the recursive routing problems that can arise with OSPF over GRE. Thanks again...
Thank you sir Liked to be watched later ! Jeremy I would suggest when you are done with the course to make a Zoom out video like how all the process done similar to live of the packet video, especially with real life examples it would be great
@@wilyoustay 2 Months Preparation Class in Germany 8h/Day with CISCO Trainer + "Wendell Odom Certguide Volume 1 & 2" + Jermeys Free CCNA Videos + "Allan Johnson 31 Days before CCNA" - But these videos here made many things clear to me that i dindt understand before. 2 Months work for around 10-12h/day, also at weekend = 92% in exam for me
Muchísimas gracias por estos videos tan bien explicados. Te he encontrado en RU-vid mientras buscaba aclarar algunos conceptos que me estaban costando de cara a presentar mi examen de certificación y sin duda estos han sido los mejores. Lamento no dejar un comentario en Inglés pero mi gramática no es tan buena y quería expresarme de forma correcta.
I started studying CCNA just to get some general knowledge over networking but man, things got serious and now I'm obsessed to get the cert😂 .U r GREat 😎. Btw any recommendations about the best CCNA books?
You can try CCNA 200-301 Official Cert Guide Vol 1 & 2, they are pretty long and dry; however the knowledge they give you are the best. An alternative option good enough is CCNA Certification Study Guide, Volume 2 : Exam 200-301 by Todd Lammle
Thank you, Mr. Jeremy, for your help and support. I have a question in this lab regarding the ping between PC1 and PC2. Why did the ping fail before configuring OSPF even though there was a static route already configured on both routers? Thank you 😊
Hi Salah! Thanks for being a channel member :) The pings fail because the ISP routers don't have routes to the customer's internal networks. The default route on R1 uses the ISP router as the next hop, so the packets are not tunneled over the GRE tunnel. They are sent directly to the ISP. When the routers use OSPF to share routes, R1 learns that it can reach R1's LAN via the GRE tunnel, so it will send the packets via the GRE tunnel. *The packets R1 sends are still destined for 10.0.2.100, which the ISP routers don't have a route to. However, using the tunnel those packets are encapsulated with a GRE header + an additional IP header, and that IP header's destination IP is 200.0.0.2, which the ISP routers do have a route to.
Hi, you have used all wildcard mask bits as 0.0.0.0 when configuring the OSPF network command. For example, at 08:08, network 192.168.1.1, wildcard mask should be 0.0.0.3 for /30 but you used 0.0.0.0 instead. Please explain
Hi! I'm doing this lab and I'm having an issue: After I configure OSPF i've got this log message after a few seconds %ADJ-5-PARENT: Midchain parent maintenance for IP midchain out of 1 65E900C0 - looped chain attempting to stack %TUN-5-RECURDOWN: 1 temporarily disabled due to recursive routing And I don't know how to solve it. I tried to do some research but I don't understand the explanation that I've found (specially because English isn't my main language and those explanation are too technical) Hope you have a great day y'all
Can i know how much course have we covered from Day 1 to Day 53 ? How much is left ? and how much time will you take to upload it ? I'm concerned because I want to learn it from you as your videos give a clear and easy image of network but I have to cover it as soon as possible because of my Final year Project as I have to make it on SDN
Hey Jeremy, I took Boson exams and I am getting some questions regarding 802.11 mac header. Do I really need to learn that for the CCNA. Also it's not mentioned in CCNA topics. I need some clarity. Please reply.
I'm not sure exactly what's on the CCNA exam. 802.11 wireless networks are part of the exam, but it's hard to say if the 802.11 header will be tested or not.
can anyone explain me why he have used ospf host routes instead of network route and even after configuring passive interface on g0/0 how does the ping from pc1 to pc 2 work
I was curious about the default route to SP1/2 so I "played" by changing them to 0.0.0.0 0.0.0.0 192.168.1/2. The Tunnel still came up and I believe the tunnel created a static route through 100.... and 200.... I took out the "default -192" routes I created and everything appeared to work, (one step ahead of yours). It appears that we both had a problem creating the tunnel without at least one set of the routes, but once established, it appears nether are required. Question: If you leave a default route through the ISP (100...), do you alter traffic (same path/different name) that should follow the 192... OSPF routing through the tunnel?
How can I get the codes and files and whatever is needed for this course? Is the course completed or still new videos are going to be produced regarding this exam?
I quote from Jeremy: "You can get the lab files/flashcards from the link in the top line of the description!" It's from his comment: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_MMuU5viinM.html&lc=UgwheY1rlnrwKpZMKZV4AaABAg.9SKZt3ouBPs9SKcogl28BU I guess this is not the end and there will be more videos.
@@JeremysITLab thanks Jeremy, the reason being is, I tried to reproduce it but not sure about what configuration should I use on the provider Routers on top, then the " tunnel" option it's not available none on the routers 1 or 2 ... Does this depend on a router model?
