Its load balanced because of the reference bandwidth which is set to 100Mbps by default. The cost metric is calculated as reference-bandwidth/interface-bandwidth. A fast ethernet and a gigabit ethernet connection will both have a cost metric of 1 even though the G0/0 should technically be preferred due to its higher bandwidth. To solve this, we need to set the reference-bandwidth to a number greater than our ethernet speed, like 100 000. This is the command: auto-cost reference-bandwidth 100000
Love the Material. Honestly, Both the slideshows and Mr.Jermy's way of delivering the content is super. no doubt this is what everyone needs for the CCNA in terms of understanding the concept and the applying it. Thanks a lot
Really appreciate that these labs have you review some concepts from prior videoes/labs. I find too often that other labbing materials will configure those basic things for you, which is nice when if you're already well practiced with those basics, but can be really unfortunate going forward, when you're into considerably more advanced topics and you can't even remember how to give an interface an IP address. Thanks for the great course!
This has to be at least my 3rd time watching all of your videos from different computers, accounts and everywhere. I finally understand everything as you speak and don't get confused, you are definitely the best there is for sure
Sir, is it because 1Gbitps and 100Mbps OSPF cost metric is 1!!. Thank you so much for your resources, I have joined your discort as well. Trust me, without your Free materials, I wouldn't even see networking as a career option. Now, I am very confident to take this path. All thanks to you sir, I will be taking my CCNA sooner as well.
For those of you guys who are struggling with getting R1 to show ASBR, all you have to do is to add ip to inteface G3/0. I think Jeremy has forgotten to pre-configure this part.
@@JeremysITLab 3 years later.... fairly certain this already happened :) Also thanks for the material as this is detailed enough but entertaining enough to keep the attention.
This one was tough for me I don't know why, when I tried it on my own I did the ospf network ranges different (strictly the subnets for each) and I didn't hit the initial default-information originate command before I set the default gateway. It didn't work for me for some reason when I followed your way it worked right. Going to try again tomorrow but loving the content man greatly appreciated. The boson lab was a bit harder to follow in all honesty I think OSPF may just need to spend more time on for me which isn't shocking considering you have 3 parts for it haha. Greatly appreciated!
For anyone confused why PC1 can't ping out, I was too/possibly still am, but I fixed it. I added an OSPF network path to R4, 192.168.0.0 0.0.255.255, and the pings went through. The other routers needed that command to learn the route to PC1
Hi Jeremy, I hope you will be doing good. First of all I would like to thanks for video what you are uploading. It is worth and will be helpful to clear concept. Apart of it, Please check IP address in all router since in diagram mentions /30 but in lab we are doing /32.
I am using a 0.0.0.0 wildcard mask to match the specific IP address on the interface. There's no need for the wildcard mask in the OSPF 'network' command to match the subnet mask configured on the interface.
I think with ospf you only have to include the actual interface ip, when using a 0.0.0.0 wildcard (255.255.255.255 regular mask) you are specifying that single interface address, not necessarily the network address
He demonstrated various methods for specifying the network ID. On R3, he specified the exact IP address of the interface, which requires using a /32 wildcard mask (0.0.0.0). He mentioned this in the previous class (RIP & EIGRP)
@@Nabiya2795 I still don't get it, I find the day 27 lab more comprehensable. Also not understanding why the wildcard mask wasn't needed in day 27 lab.
@@ActionzvanNeshie11 , I will greatly appreciate if you share the practice files from Wendell's site to my e-mail, delgadojjj@gmail.com. Thanks in advance.
Hello Jeremy and thanks for another excellent video. I cannot remember if you have mention this in the past, but packet tracer seems to have a mind of his own. I have completed the lab and followed step by step, exactly your lecture but when I went to check the routing table of R4, it seems that only the route through R2 has been added to its touting table. Is it possible that packet tracer is not so reliable at times? Thanks
Hey, great videos! I'm following all of them. In this one, I saw a difference when I did it, and it was due to I enable the interface g0/0 R4 (192.168.4.2 255.255.255.0) and the route was added to all the routers. Then I "shutdown" the interface and all the routing tables were like the video! Thanks!
Hello Jeremy Sir, you are doing a tremendous job. I just can't get both route on R4 from the do show ip route. Just from R2, not showing R3. I did everything as done. Thankyou.
I don't understand why sometime you use wildcard mask is 0.0.0.0, sometime you use 0.0.0.3. So if I use wildcard mask is 0.0.0.0 for whole this lab. Will it be OK? Please expalain for me. Thanks
Wildcard 0.0.0.0 netmask means 255.255.255.255, which means for that network you are configuring OSPF to be on that 1 host, no other hosts (until he adds it on another host on a separate command later, which then means those 2 specific hosts). Wildcard 0.0.0.3 netmask means 255.255.255.252, meaning a small range of IPs (2 usable), so he doesn't have to specify each host every time as long as they fall in that network range unlike with 0.0.0.0. He's just showing that you can you either or, depending on your preference and on the situation.
Hi Jeremy, I'm not sure if you still check comments, but if you do, I have 2 questions: 1. Is configuring the same network command of, 10.0.0.0 0.0.63.255 area 0, to R1-R4 okay in the real world? 2. If you forget to set the loopback interfaces as passive, will this noticeably harm/slow the routers in larger networks? Thanks!
@@JeremysITLab Hello and thank you! I'm half way through the video's you currently have up, just finished sub-netting. With your current video library and me planning on using boson would that be enough information to pass the CCNA?
1. Which method would be preferred in real networks for enabling OSPF? 2. What's the significance of enabling OSPF on loopback interfaces? Also, having a hard time making R1 ASBR. Default-information originate doesn't seem to do anything. edit: Default route doesn't get entered into the routing table. I did exactly what you did...from global config, ip route 0.0.0.0 0.0.0.0 203.0.113.2 edit2: it shows up in running-config though, under ip classess.
1: Configure either the subnet address and mask or the exact interface address with /32 2: To advertise the IP address of the loopback interface to other routers, so they can use the address to reach the router Not sure about the *default-information originate* problem. All there is to it is configuring a static route and entering the command, if it's not working maybe something's up with packet tracer? Never had any problems with it myself.
@@JeremysITLab Thank you so much for finding time to respond. I started the lab anew and this time it worked. Maybe I misconfigured something the first time. Or maybe Packet Tracer was acting up. It did crash on me once before. Anyway, thanks again.
@@JeremysITLab I am having this issue as well.. hopefully I can get it up and running. All of the routers are showing as OSPF neighbors and the static route is there. I paused the video and made sure our configurations are the same. I'll keep trying
Hi Jeremy. Thank you so much for these videos. I'm trying to replicate the labs on packet tracer but I can't seem to configure IP addresses on the FastEthernet ports of the Cisco Routers. How do I go about this?
While trying to configure the the ip addresses on R1, I kept getting overlap errors. What am I doing incorrectly? I'm using the command ip address 10.0.12.1 255.0.0.0 for for the g0/0 interface, but when I attempt to use the command ip address 10.0.13.1 255.0.0.0, I'm getting an error that it overlaps with with g0/0. Any tips?
I'm a bit confused. Are you not required to assign loopback addresses to loopback interfaces? How can you assign 4.4.4.4 if it's not in the 127.0.0.1 - 127.255.255.254 range? Not sure if I missed it during the lecture from the previous video or if I just need to finish this video first?
Hello. I don't understand that when you enter the network command, the wild card mask is not /30 for the interfaces of R2. You used /24 wild card mask. Why?
i believe no auto summary is default on OSPF and EIGRP, while RIP it is by default auto summary. the last EIGRP lab i think he enabled it so we can practice to disable it.
Please help: mine is not working, when i check the #sh ip int br , all the ports are administative down, down on all the 4 routers. Would this cause the ospf not to work? i tried using #sh ip ospf database and its only has its own LSA not its neighbor LSA(L0 addresses), and i dont have any think under net link state or type 5 as extrnal link state. since the all the ports are admin down, down. the ospf wont work right?
@@JeremysITLab Thanks for your reply. I figured it out after doing it in Packet Tracer. Btw just to let you know that you have an excellent method of teaching. I went through a lot of other videos but they missed out on something. Kudos to you. Inspired by you, I am also going to try making some videos to help people learn.
Hi Jeremy, I have an off-topic question for you... If you have created a network topology that has a network of "192.168.1.0 /24" for example and you've implemented this. What would you have to do if you realize that you have not accommodated for the expansion of devices/hosts on that network and you run out of addresses?
@@JeremysITLab thanks for the reply! And yeah I thought that would be the case. BTW this course is absolutely brilliant and I look forward to completing it and sit the exam.
Aakash Bharati That is correct, as Jeremy explained in the video and previous video. There are reasons why you may want to be very specific by using “individual” /32 wildcard masks (security in a real, live production environment for example) and reasons for using /16 or /24 or /30 or something in between to “summarise” or group the network interfaces by subnet id (minimise configuration but with some security), or just use 0.0.0.0 255.255.255.255 in a lab environment where security is irrelevant and speed of setup is more important.
I entered the ip route command first in R1 before adding the default-information originate in ospf. When I checked the show ip protocols, it didn't show that R1 is an ASBR. I removed both commands then entered them in the same order as you did and now it shows that R1 is the ASBR. Does the order really matter?
Mine didn't show "this is an autonomous system boundary router" no matter how many times I input the default route (and default-information originate) on R1, R1 routing table shows " gateway of last resort is not set" Any idea why?
@@JeremysITLab yes. Now I just found that if I use exit interface ie. g3/0 (rather than next hop 203.0.113.2), packet tracer accepts my default route input. R1 (sh ip protocol) now outputs "this is an autonomous system boundary router" . But when I look at R4 routing table, it shows "Gateway of last resort is 10.0.34.1 to network 0.0.0.0" that means R3. (rather than 10.0.24.1 =R2 that shown in your video at 12:28 ). Is my configuration still correct? Thanks
@@alancwwong Hey I've been having this problem as well, I have re-watched this lab twice and followed along just to make sure I got everything correct and it's still having issues. Even changing the default route to use the interface as the next hop didn't fix it for me. I'm glad to hear someone else is struggling with the same issue so I'll probably just accept it as an issue with packet tracer and move on. This lab was fantastic but might be worth for Jeremy to pin a comment informing that some people have had problems.
@@alancwwong Oh my god, I feel so stupid. That was the one interface I didn't set an IP for... lol. Thanks for the help, I can't believe I missed something like that!
Hello Jeremy. I can't get (on R1) the loopback interface to become the router ID (1.1.1.1), At the moment, I get the IP of the G3/0 interface (203.0.113.1). I already configured all the OSPF routes and enabled the static route and the default-information originate command. What could be the problem? I appreciate your kind response
I don't know why this is, but when I check the OSPF Database on R1, it says Link ID 4.4.4.4 (R4) has a Link count of 4, not 3 as seen in your Database. I re-did the configuration on the network several times but it always comes up that way. Any idea why that is?
See in your practice lab network propagation doesn't work after populating the "router ospf 1/2/3/4", I dont get the new routing entries to the routes populated in the other routers for some reason, am I the only one?
I have a small issue when I try to connect router to two other devices plus one switch's I am able to give IP address to two other routers but not to the switch interface, how can I solve this issue? IN R4 I am able to give ip add to R2 and R3 but not to the one which is connected to the switch how can I solve this problem in packet tracer?
For PtP links, is there any advantage in using a single host network statement e.g. "10.0.13.1 0.0.0.0 area 0" vs. a subnet, like "10.0.13.0 0.0.0.3 area 0"?
@@Jacktubbygreen9871 0.0.0.0 is just stating that only 10.0.13.1 is in the network, while 0.0.0.3 would define 10.0.13.1 - 10.0.13.3 as part of the network. In this specific setup there is no benefit really besides being more specific. From a best practice standpoint I'm not entirely sure.
I have a problem, the static route works on R1 but after entering "default-information originate " the route doesn't appear on the other routers routing table, I checked all the commands multiple times to make sure I didn't make mistakes. I am just wondering if it could be packet tracer related or I am doing something wrong. If anyone has been through this issue please inform me what could be the solution thank you !
packet tracer would not load the gateway of last resort for my lab so it would not set the ASBR. I have done everything from reloading the router, reloaded packet tracer but it did not work. :/
- make sure u put the "ip route 0.0.0.0 0.0.0.0 next-hop" command already in R1 - make sure u already assigned an ip address on R1's G3/0 if you can see the route on R1, then you should be able to see the route on the other routers
In this video, we have configured four different process IDs on each router. Won't they create four different domains on each router? How did they become neighbors without a redistribute command. Kindly help to resolve my query Jeremy
Hi sir, on 5:42 , why is the command network 10.0.13.2 using wildcard mask 0.0.0.0 to activate OSPF whereas on 6:50 the command network 10.0.0.0 using wildcard mask of 0.0.255.255
Hi Louis, I did that to demonstrate that there are multiple possible options when using the 'network' command to activate OSPF on an interface. As long as the correct bits match, OSPF will be activated on the interface.
i've been taught that we need to configure ospf with NETWORK addresses on the router connected to. But little bit confused, when you configured ospf on interface with 32 mask on R3 interfaces. What is the point of doing that? What is the difference compared to configuring network address?
the network command is for including the INTERFACES of this router in the OSPF process. so you can use /32 /30 /24 /0 anything, as long as it includes the ip address of the interface that this router is on
Thanks so much Jeremy these videos are great! Could this be a packet tracer bug: When I look at my Router4 routing table at 12:25 I have a connected route to 192.168.4.0 /24 and also when looking at routing tables for R1, 2 and 3 I also have OSPF route to 192.168.4.0 /24. When you do 'show ip route' this network is not present in your routing tables.
Thank you for clarifying this. In step 2, I saw that G0/0 in R4 is not configured in show interface brief command so I thought you might forget it 😆. Anyway, I'm having a blast with all your lectures and labs. Amazing work as usual !! @@JeremysITLab
Hi Mr Jeremy I just got a copy of boson exsim max, but when I try to open the reference link ( below the answer) it says there is error accessing the web browser. Do you have any idea about what the issue could be ?
if i do summarasation on each router of 10.0.0.0 0.0.255.255 i would reach the same result (in this lab) with all interfaces start with 10.0.x.x correct?
Hi Jeremy, For some reason i cannot get any of the routers to learn the 192.168.4.0/24 route. pc1 can ping its DG and all routers can communicate but for some reason i cannot get any routers to learn that route
Its load balanced because of the reference bandwidth which is set to 100Mbps by default. The cost metric is calculated as reference-bandwidth/interface-bandwidth. A fast ethernet and a gigabit ethernet connection will both have a cost metric of 1 even though the G0/0 should technically be preferred due to its higher bandwidth. To solve this, we need to set the reference-bandwidth to a number greater than our ethernet speed, like 100 000. This is the command: auto-cost reference-bandwidth 100000
Good one Martin. I agree with this too. Need to put in a static value as OSPF treats both FE/GIG as equal.
Good answer! 👍
For the first time , I did your lab by understanding the concept and without a guide. You are a true hero Bud!
Love the Material. Honestly, Both the slideshows and Mr.Jermy's way of delivering the content is super. no doubt this is what everyone needs for the CCNA in terms of understanding the concept and the applying it. Thanks a lot
Really appreciate that these labs have you review some concepts from prior videoes/labs. I find too often that other labbing materials will configure those basic things for you, which is nice when if you're already well practiced with those basics, but can be really unfortunate going forward, when you're into considerably more advanced topics and you can't even remember how to give an interface an IP address. Thanks for the great course!
This has to be at least my 3rd time watching all of your videos from different computers, accounts and everywhere. I finally understand everything as you speak and don't get confused, you are definitely the best there is for sure
This was a very fun lab, I hope to teach/help others like you do someday. Thanks Jeremy!!
Thanks, glad you liked it! Making a UA-cam channel is free, go for it ;)
Sir, is it because 1Gbitps and 100Mbps OSPF cost metric is 1!!.
Thank you so much for your resources, I have joined your discort as well. Trust me, without your Free materials, I wouldn't even see networking as a career option. Now, I am very confident to take this path. All thanks to you sir, I will be taking my CCNA sooner as well.
For those of you guys who are struggling with getting R1 to show ASBR, all you have to do is to add ip to inteface G3/0. I think Jeremy has forgotten to pre-configure this part.
he said you should configure ip's for each router, so g3/0 is included as your task
ooh I missed this one, thanks a lot!
Thanks a lot
Thank you. Your comment saved me a tons of stress.
Yeah I forgot the part where I had to assign ip to g3/0 and unable it. just did it and works fine. thanks for the reminder
making so much progress learning CCNA. day 26! thanks Jeremy!
Thank you so MUCH!! I hope this series will never see its end, we LOVE it.
Great training as always 👍
You do this better than anyone out there. Seriously, this is your calling. Awesome 👏🏽
Thanks Steven! Hopefully I can turn this channel into a career at some point ;)
@@JeremysITLab 3 years later.... fairly certain this already happened :) Also thanks for the material as this is detailed enough but entertaining enough to keep the attention.
Thanks J. Always something to grasp somewhere. God bless
Thanks Glenn :)
Thank you very much for a video, was waiting every day.
Thank you Alyona ;)
This one was tough for me I don't know why, when I tried it on my own I did the ospf network ranges different (strictly the subnets for each) and I didn't hit the initial default-information originate command before I set the default gateway. It didn't work for me for some reason when I followed your way it worked right. Going to try again tomorrow but loving the content man greatly appreciated. The boson lab was a bit harder to follow in all honesty I think OSPF may just need to spend more time on for me which isn't shocking considering you have 3 parts for it haha. Greatly appreciated!
Always the best in teaching, nice work Jeremy.
Thanks Kone :)
For anyone confused why PC1 can't ping out, I was too/possibly still am, but I fixed it. I added an OSPF network path to R4, 192.168.0.0 0.0.255.255, and the pings went through. The other routers needed that command to learn the route to PC1
oh that's why he didn't have a route to the LAN. was confused because my one had (i did it before watching) but Jeremy's one didn't.
sorry, why we use on R3 0.0.0.0 wildcard instead of 0.0.0.3? is it legal? or available only to one of others?
2:15 loopback int R4
2:33 do sh ip int br
2:40 do sh int l0
3:10 OSPF
5:01 loopback int R3
Hi Jeremy, I hope you will be doing good. First of all I would like to thanks for video what you are uploading. It is worth and will be helpful to clear concept. Apart of it, Please check IP address in all router since in diagram mentions /30 but in lab we are doing /32.
I am using a 0.0.0.0 wildcard mask to match the specific IP address on the interface. There's no need for the wildcard mask in the OSPF 'network' command to match the subnet mask configured on the interface.
@@JeremysITLab thank you
U ARE THE BEST!!! Thanks to You i can really start a whole New Chapter in my Life !!!
Good luck! :)
Jeremy, on the OSPF configuration for router 3 why is the subnet mask specified as 0.0.0.0 if the mask on the topology is a /30?
i have the same question too
I think with ospf you only have to include the actual interface ip, when using a 0.0.0.0 wildcard (255.255.255.255 regular mask) you are specifying that single interface address, not necessarily the network address
He demonstrated various methods for specifying the network ID. On R3, he specified the exact IP address of the interface, which requires using a /32 wildcard mask (0.0.0.0). He mentioned this in the previous class (RIP & EIGRP)
@@Nabiya2795 I still don't get it, I find the day 27 lab more comprehensable. Also not understanding why the wildcard mask wasn't needed in day 27 lab.
The feeling of exicetement can't be described when you do a whole lab on your own without any error in first try.
Thank You for the videos my friend!
Thanks for watching, Dario!
Thank you so much my tutor, I am about to write my CCNA Exam next week. Thanks for the help.
Good luck! What other resources are you using?
@@JeremysITLab I am looking for a latest dump
@@JeremysITLab I am using Wendell's Official Cert Guides
@@ActionzvanNeshie11 can you share the dump at yesitsmesagar@gmail.com
@@ActionzvanNeshie11 , I will greatly appreciate if you share the practice files from Wendell's site to my e-mail, delgadojjj@gmail.com.
Thanks in advance.
Finally, i understand OSPF.
Hello Jeremy and thanks for another excellent video. I cannot remember if you have mention this in the past, but packet tracer seems to have a mind of his own. I have completed the lab and followed step by step, exactly your lecture but when I went to check the routing table of R4, it seems that only the route through R2 has been added to its touting table. Is it possible that packet tracer is not so reliable at times? Thanks
very good lab, many thanks to Jeremy
Thanks Jeremy! God bless you
Thank you Nicholas!
Best instructor thank U man
Thanks, Rachid!
Hey, great videos! I'm following all of them. In this one, I saw a difference when I did it, and it was due to I enable the interface g0/0 R4 (192.168.4.2 255.255.255.0) and the route was added to all the routers. Then I "shutdown" the interface and all the routing tables were like the video! Thanks!
Thank you very much for helping us to become expert in IT
I'm happy to help :)
You are like god for those who can't afford the fees of any institute thank you man
Hello Jeremy Sir, you are doing a tremendous job. I just can't get both route on R4 from the do show ip route. Just from R2, not showing R3. I did everything as done. Thankyou.
same here
hey,
You showed us 4 different way to configure network in OSPF, what is the best way to use in real life?
you are very good Jeremy
Fast ethernet and gigabit have same cost under default reference bandwidth... that is why both path preferred from R4.
Thank you jeremy!
Thank you very much Jeremy
Thanks Armand :)
Commenting to boost channel
Thanks, I appreciate it :)
Both R4 > R2 > R1 & R4 > R3 > R1 have same cost metric of [1] @ default config.
please add CCNP tranning as well with deep dives
Thank you Jeremy
Thanks for watching and leaving a comment :)
thank you so much
thank you. You are just amazing.
Thank you, I appreciate it :)
Thanks alot for your videos❤️.
Thanks for watching :)
I don't understand why sometime you use wildcard mask is 0.0.0.0, sometime you use 0.0.0.3. So if I use wildcard mask is 0.0.0.0 for whole this lab. Will it be OK? Please expalain for me. Thanks
same thing here. thus, having problem to reach ispr 1 from other routers
Wildcard 0.0.0.0 netmask means 255.255.255.255, which means for that network you are configuring OSPF to be on that 1 host, no other hosts (until he adds it on another host on a separate command later, which then means those 2 specific hosts). Wildcard 0.0.0.3 netmask means 255.255.255.252, meaning a small range of IPs (2 usable), so he doesn't have to specify each host every time as long as they fall in that network range unlike with 0.0.0.0. He's just showing that you can you either or, depending on your preference and on the situation.
Thank you!
Thanks for watching and leaving a comment :)
Once again, thank you for this excellent content!
Thanks Miguel :)
Thank you so much ❤️
Thanks for watching and leaving a comment :)
well done, thank you!
Thanks, I appreciate all the comments :)
Thanks Jeremy.
Thank you very much Jeremy!
Btw just wondering, what is the next topic after OSPF?
First hop redundancy protocols, to finish up topic 3.0 of the exam topics list (except for the IPv6 part, which will come soon after).
Hi Jeremy, I'm not sure if you still check comments, but if you do, I have 2 questions:
1. Is configuring the same network command of, 10.0.0.0 0.0.63.255 area 0, to R1-R4 okay in the real world?
2. If you forget to set the loopback interfaces as passive, will this noticeably harm/slow the routers in larger networks?
Thanks!
Great video as usual :-)
Thanks Aaron!
what's the point in enabling ospf on the loopback if you;re gonna set it to passive interface?
Thanks alot for providing the course...But a question is that when did this course will be finished??
Early next year I guess, not sure.
@@JeremysITLab Hello and thank you! I'm half way through the video's you currently have up, just finished sub-netting. With your current video library and me planning on using boson would that be enough information to pass the CCNA?
1. Which method would be preferred in real networks for enabling OSPF?
2. What's the significance of enabling OSPF on loopback interfaces?
Also, having a hard time making R1 ASBR. Default-information originate doesn't seem to do anything.
edit: Default route doesn't get entered into the routing table. I did exactly what you did...from global config, ip route 0.0.0.0 0.0.0.0 203.0.113.2
edit2: it shows up in running-config though, under ip classess.
1: Configure either the subnet address and mask or the exact interface address with /32
2: To advertise the IP address of the loopback interface to other routers, so they can use the address to reach the router
Not sure about the *default-information originate* problem. All there is to it is configuring a static route and entering the command, if it's not working maybe something's up with packet tracer? Never had any problems with it myself.
@@JeremysITLab Thank you so much for finding time to respond.
I started the lab anew and this time it worked. Maybe I misconfigured something the first time. Or maybe Packet Tracer was acting up. It did crash on me once before.
Anyway, thanks again.
@@JeremysITLab I am having this issue as well.. hopefully I can get it up and running. All of the routers are showing as OSPF neighbors and the static route is there. I paused the video and made sure our configurations are the same. I'll keep trying
Okay now it works no problem? Perfect I guess? Same settings
@@JeremysITLab probably you forgot to set ip address on R1 G3/0 thats why default-information originate not working. That was my case.
Yes!
Thank you dear leader!
Hi Jeremy. Thank you so much for these videos. I'm trying to replicate the labs on packet tracer but I can't seem to configure IP addresses on the FastEthernet ports of the Cisco Routers. How do I go about this?
Youre the best btw!
While trying to configure the the ip addresses on R1, I kept getting overlap errors. What am I doing incorrectly? I'm using the command ip address 10.0.12.1 255.0.0.0 for for the g0/0 interface, but when I attempt to use the command ip address 10.0.13.1 255.0.0.0, I'm getting an error that it overlaps with with g0/0. Any tips?
I'm a bit confused. Are you not required to assign loopback addresses to loopback interfaces? How can you assign 4.4.4.4 if it's not in the 127.0.0.1 - 127.255.255.254 range? Not sure if I missed it during the lecture from the previous video or if I just need to finish this video first?
Hello. I don't understand that when you enter the network command, the wild card mask is not /30 for the interfaces of R2. You used /24 wild card mask. Why?
I could be wrong but doesn't ospf calculate fast Ethernet and Gig Ethernet with the same cost That's why both paths appeared in the routing table.
That's correct! Actually in this case there is a more complicated reason in addition to that, but I'll mention it in one of the next few videos ;)
why are we not using wildcard mask 0.0.0.3?
10.0.8... it is incorrect...
so 0.0.0.3 is incorrent
@@NetworkingwithHamza i don't get it.
Don't you have to do 'no auto summary' when configuring OSPF Routers? @5:00
i believe no auto summary is default on OSPF and EIGRP, while RIP it is by default auto summary. the last EIGRP lab i think he enabled it so we can practice to disable it.
Please help: mine is not working, when i check the #sh ip int br , all the ports are administative down, down on all the 4 routers. Would this cause the ospf not to work? i tried using #sh ip ospf database and its only has its own LSA not its neighbor LSA(L0 addresses), and i dont have any think under net link state or type 5 as extrnal link state.
since the all the ports are admin down, down. the ospf wont work right?
The answer to "Why R4 will load balance via two routes", is it because by default OSPF uses maximum 4 paths to load balance?
Yes, that's part of the answer! But one path includes a faster GigabitEthernet link, the other one is all FastEthernet.
@@JeremysITLab Thanks for your reply. I figured it out after doing it in Packet Tracer. Btw just to let you know that you have an excellent method of teaching. I went through a lot of other videos but they missed out on something. Kudos to you. Inspired by you, I am also going to try making some videos to help people learn.
Hi Jeremy thanks for another great lesson. On the routing table only the route via 10.0.34.1 is added, did I do something wrong or could be ?
If you did the configurations as I did, don't worry about it. Unfortunately packet tracer isn't a perfect tool!
Try manually changing router ID if it bothers you =) That's what I did hahaha
equal-cost load balancing.
Hi Jeremy, I have an off-topic question for you...
If you have created a network topology that has a network of "192.168.1.0 /24" for example and you've implemented this. What would you have to do if you realize that you have not accommodated for the expansion of devices/hosts on that network and you run out of addresses?
The only option would be to get a larger block of addresses to subnet.
@@JeremysITLab thanks for the reply! And yeah I thought that would be the case. BTW this course is absolutely brilliant and I look forward to completing it and sit the exam.
6:44 i didn't understand how you configured both the physical interfaces with this command, and why /16 mask was used? great video by the way
Check out the Day 25 video (RIP and EIGRP) to review the use of the 'network' command and wildcard masks.
@@JeremysITLab ohh, okay so we can use any of the four methods that you used for four routers right?
Aakash Bharati That is correct, as Jeremy explained in the video and previous video. There are reasons why you may want to be very specific by using “individual” /32 wildcard masks (security in a real, live production environment for example) and reasons for using /16 or /24 or /30 or something in between to “summarise” or group the network interfaces by subnet id (minimise configuration but with some security), or just use 0.0.0.0 255.255.255.255 in a lab environment where security is irrelevant and speed of setup is more important.
@@3232groundhog Right, thanks for explaining :)
Is it equal to configure /30 network as “network x.x.x.x 0.0.0.0” and as “network x.x.x.x 0.0.0.3”?
I entered the ip route command first in R1 before adding the default-information originate in ospf. When I checked the show ip protocols, it didn't show that R1 is an ASBR. I removed both commands then entered them in the same order as you did and now it shows that R1 is the ASBR. Does the order really matter?
Nope, the order doesn't matter.
may be 100000/100000 = 1 + 10 = 11 i think this would be the cost of Gig Ethernet and Fast Ethernet cost 19, that is why preferred Gig Ethernet .
FastEthernet costs 1, not 19. 19 is for spanning tree ;)
Hi, can we use the your trick command (net 0.0.0.0 255.255.255.255 area 0 ) in the real exam? thanks for everything.
Mine didn't show "this is an autonomous system boundary router" no matter how many times I input the default route (and default-information originate) on R1, R1 routing table shows " gateway of last resort is not set" Any idea why?
Did you download my lab file and configure it exactly as I did?
@@JeremysITLab yes. Now I just found that if I use exit interface ie. g3/0 (rather than
next hop 203.0.113.2), packet tracer accepts my default route input. R1 (sh ip protocol) now outputs "this is an autonomous system boundary router" . But when I look at R4 routing table, it shows "Gateway of last resort is 10.0.34.1 to network 0.0.0.0" that means R3. (rather than 10.0.24.1 =R2 that shown in your video at 12:28 ). Is my configuration still correct? Thanks
@@alancwwong Hey I've been having this problem as well, I have re-watched this lab twice and followed along just to make sure I got everything correct and it's still having issues. Even changing the default route to use the interface as the next hop didn't fix it for me. I'm glad to hear someone else is struggling with the same issue so I'll probably just accept it as an issue with packet tracer and move on.
This lab was fantastic but might be worth for Jeremy to pin a comment informing that some people have had problems.
@@will8602 Did you "no shut" the interface g3/0 with right ip add?
@@alancwwong Oh my god, I feel so stupid. That was the one interface I didn't set an IP for... lol.
Thanks for the help, I can't believe I missed something like that!
Thanks
Hi Jeremy ,the ping on 203.0.113.1 is succesfull but ping on 203.0.113.2 its fail...please help me😊 Great work!
Hello Jeremy. I can't get (on R1) the loopback interface to become the router ID (1.1.1.1), At the moment, I get the IP of the G3/0 interface (203.0.113.1). I already configured all the OSPF routes and enabled the static route and the default-information originate command. What could be the problem? I appreciate your kind response
Already solved. Delete the ospf configuration and enter everything again and it worked. Thank you
I don't know why this is, but when I check the OSPF Database on R1, it says Link ID 4.4.4.4 (R4) has a Link count of 4, not 3 as seen in your Database. I re-did the configuration on the network several times but it always comes up that way. Any idea why that is?
See in your practice lab network propagation doesn't work after populating the "router ospf 1/2/3/4", I dont get the new routing entries to the routes populated in the other routers for some reason, am I the only one?
I have a small issue
when I try to connect router to two other devices plus one switch's I am able to give IP address to two other routers but not to the switch interface, how can I solve this issue?
IN R4 I am able to give ip add to R2 and R3 but not to the one which is connected to the switch
how can I solve this problem in packet tracer?
Is ccna worth now or not . I mean to get a job ccna is good.
Sir i think it used the concept of successor and feasible successor. Best route and not best route.
So is the loopback interfaces only meant to receive the LSA ospf messages, but it shouldn't receive ospf hello messages?
For PtP links, is there any advantage in using a single host network statement e.g. "10.0.13.1 0.0.0.0 area 0" vs. a subnet, like "10.0.13.0 0.0.0.3 area 0"?
Do you have any explanation for this? I do have the same question. Thank you!
@@Jacktubbygreen9871 0.0.0.0 is just stating that only 10.0.13.1 is in the network, while 0.0.0.3 would define 10.0.13.1 - 10.0.13.3 as part of the network. In this specific setup there is no benefit really besides being more specific. From a best practice standpoint I'm not entirely sure.
I have a problem, the static route works on R1 but after entering "default-information originate " the route doesn't appear on the other routers routing table, I checked all the commands multiple times to make sure I didn't make mistakes. I am just wondering if it could be packet tracer related or I am doing something wrong. If anyone has been through this issue please inform me what could be the solution thank you !
same for me, no error, nothing. It just do not add it. No idea what could be the issue
packet tracer would not load the gateway of last resort for my lab so it would not set the ASBR. I have done everything from reloading the router, reloaded packet tracer but it did not work. :/
- make sure u put the "ip route 0.0.0.0 0.0.0.0 next-hop" command already in R1
- make sure u already assigned an ip address on R1's G3/0
if you can see the route on R1, then you should be able to see the route on the other routers
In this video, we have configured four different process IDs on each router. Won't they create four different domains on each router? How did they become neighbors without a redistribute command.
Kindly help to resolve my query Jeremy
that's area. process id and area are different. area needs to be same on all routers, process id don't.
Hi sir,
on 5:42 , why is the command network 10.0.13.2 using wildcard mask 0.0.0.0 to activate OSPF
whereas on 6:50 the command network 10.0.0.0 using wildcard mask of 0.0.255.255
Hi Louis,
I did that to demonstrate that there are multiple possible options when using the 'network' command to activate OSPF on an interface. As long as the correct bits match, OSPF will be activated on the interface.
i've been taught that we need to configure ospf with NETWORK addresses on the router connected to. But little bit confused, when you configured ospf on interface with 32 mask on R3 interfaces. What is the point of doing that? What is the difference compared to configuring network address?
the network command is for including the INTERFACES of this router in the OSPF process. so you can use /32 /30 /24 /0 anything, as long as it includes the ip address of the interface that this router is on
あなたのヴィデオ楽しんで見ます。
Thanks so much Jeremy these videos are great! Could this be a packet tracer bug: When I look at my Router4 routing table at 12:25 I have a connected route to 192.168.4.0 /24 and also when looking at routing tables for R1, 2 and 3 I also have OSPF route to 192.168.4.0 /24. When you do 'show ip route' this network is not present in your routing tables.
I just forgot to configure R4 G0/0 before recording the video 👍
Thank you for clarifying this. In step 2, I saw that G0/0 in R4 is not configured in show interface brief command so I thought you might forget it 😆. Anyway, I'm having a blast with all your lectures and labs. Amazing work as usual !! @@JeremysITLab
Hey... Do u have any paid online course for ccna like one to one ????
Nope, only this course on UA-cam! :)
Hi Mr Jeremy
I just got a copy of boson exsim max, but when I try to open the reference link ( below the answer) it says there is error accessing the web browser. Do you have any idea about what the issue could be ?
Not sure...I think you can contact Boson support from within the app, maybe try that?
@@JeremysITLab thank you Mr Jeremy for your help and patience with us.
if i do summarasation on each router of 10.0.0.0 0.0.255.255 i would reach the same result (in this lab) with all interfaces start with 10.0.x.x correct?
How can one add OSPF without using the network command
Hi Jeremy,
For some reason i cannot get any of the routers to learn the 192.168.4.0/24 route. pc1 can ping its DG and all routers can communicate but for some reason i cannot get any routers to learn that route
I may have been lazy and have been skipping some of the labs. For me to learn step 1 of this which video should I go back to?
Check Day 7 or 8 for how to configure IP addresses on a router. Not sure which video I introduced the hostname command, maybe around Day 4.
@@JeremysITLab Thanks