This makes no sense. He had IP reachability between sites not via the VPNv4 routes over the SP cloud, but via the OSPF domain. It showed up in the customer routing table as an inter area route, so the routing was occurring via the SP's underlay network. That's completely incorrect and really misleading. The final ta-dah test was simply two routers reaching each other via inter area routing in OSPF, not via the "MPLS SP core".
i just wanted to say that i lost my job recently and have decided to build my networking skills a bit more… ive had so much fun using your videos for reference for reading and i see you train on linkedin too…. i subscribed… i have been having alot of fun thanks to you
Excellent Kevin, The only point I didn't understand is why we used af ipv4 while redisribution from ospf 2. address-family ipv4 vrf CUST-A; why cant we use vpnv4 here as well?
omg Thank you Kevin! I was so clueless about MPLS and it always made me nervous, not only did I understand this so well, I took notes and using it I built a more complex topology with multiple sites and using route distinguishers I successfully ran same subnets on different sites without issues! Thank you!!!
That's the all too common view. It's only "new" and "weird" until you've seen how it works - and to some extent _why._ ("Switching" because at the time "routing" was a euphemism for "slow" -- it was, and a lookup happening at every hop made it even slower. In simplest terms, it's a trick to only do a route lookup once, and know how the traffic will flow across the network ("path") - something frame and atm engineers knew well, but "IP" had to rediscover.)
I need help, my name is Patrício Mateus I am a high school student in the Computer Technician course. I'm preparing the final project, and I'm using Mpls to interconnect two hospitals, I have mpls running but I can't connect it to the LAN network of each hospital How do I connect the MPLS network to the network?
Thanks Kevin for this video, it was very useful. This scenario is assuming the customers are in the same AS as the service provider, given that you are using ospf between the PE and CE. In real-life scenarios, the customer will be in different AS. So the CE will be in a different AS as well and we will be using BGP. Is my understanding correct here or is the CE a service provider CE?
One question though. The last step we did was redistribute bgp into ospf process 2. But let's say we have multiple customers. Obviously we are using the same AS number in PEs. So in that case when we redistribute BGP into ospf, wouldn't all routes in the bgp get redistributed ? Like all the routes from all the customers ?
I think you leaked the Customer routes into your Cloud Core routing. The Customer facing interfaces on the PEs should be ina vrf CUST-A, which you did, then the OSPF process on the PE towards the Customer should be vrf CUST-A aware. When you redistribute BGP (ipv4 vrf CUST-A) into OSPF 2 (default vrf) you leak your Customer routes into your Core routing. The point is to have Core unaware about Customer routes, it should know only Loopbacks on R1,R2 and R3. I might be wrong though...
This session on MP-BGP on establish MPLS was a fundamental take away on MPLS establishment. On the first insight on viewing the animated treat on CE-A to CE-D and CE-B to CE-C itself was helping to understand MPLS - TE concepts and MPLS advantages - Animations are awesome
I´m trying to import the lab on CML but I get this error: Failed: The API at /api/v0/import encountered an unexpected error. Please report this problem to support. / Anyone knows how to fix this? I am using the Free version of CML i think that might be issue.
Great tuto, i learned a lot knowing that i did not even got a ccnp, M'y question : on the PE router, WE actually need to have two différent OSPF process ( two distinct process ID) ? In case WE had multiple customers, do WE need to have différent bgp process for each client so that there would bé no leakage of différent customers's route? Thank a lot.
Hi Kevin, I am trying to understand MPLS and saw your video, which is excellent. It's the first time I've seen it, and I could follow it - up until the MP-BGP part. I am not clear why MP-BGP is needed for MPLS. Can you please explain briefly why MP-BGP and VPN is needed for MPLS? Many thanks!
I had forgotten most of these commands sincs it's been a very long time after passing my CCNP, which has alos expired. As always, you have again made the difficult stuff to look pretty simple.
It is like watching Netflix, even if I am tired I wanted to add one more Kevin's video. I am waiting for L2VPN and TE tunnels. Thank you for making it interesting!!
Hello sir Your a great at this i love the way you teach Got a better understanding of QOS Ur amazing, I love to make it big in networking industry ur truly inspiring to me
Some questions please - from the topology, all the LSRs are connected to each other but in a real-world scenario, the customer will have branches probably in two different countries and there may be so many AS between the service provider cloud. Does this change anything? What if the different AS between the service provider clouds don't have mpls activated on them (as was done on all 3 routers in the topology), do you just need to only enable mpls on routers within your (service provider) routers?
It gets a bit "messy" when crossing an AS boundary. In my experience, people rarely interconnect with MPLS, thus an "MPLS Cloud" usually has to be entirely within a single service provider's network. (not that ISP1 can't buy a path across ISP2)
This makes no sense. He had IP reachability between sites not via the VPNv4 routes over the SP cloud, but via the OSPF domain. It showed up in the customer routing table as an inter area route, so the routing was occurring via the SP's underlay network. That's completely incorrect and really misleading. The final ta-dah test was simply two routers reaching each other via inter area routing in OSPF, not via the "MPLS SP core".
Please kindly make videos on configuring EIGRP,BGP,SDWAN from scratch with details and detail steps mentioned and explained for the same
i just wanted to say that i lost my job recently and have decided to build my networking skills a bit more… ive had so much fun using your videos for reference for reading and i see you train on linkedin too…. i subscribed… i have been having alot of fun thanks to you
u really explain unbelievable, you make very difficult stuff look easy, loved the ospf lsa types video as well, and the dmvpn and the private vlans.
Excellent Kevin, The only point I didn't understand is why we used af ipv4 while redisribution from ospf 2.
address-family ipv4 vrf CUST-A; why cant we use vpnv4 here as well?
omg Thank you Kevin!
I was so clueless about MPLS and it always made me nervous, not only did I understand this so well, I took notes and using it I built a more complex topology with multiple sites and using route distinguishers I successfully ran same subnets on different sites without issues!
Thank you!!!
That's the all too common view. It's only "new" and "weird" until you've seen how it works - and to some extent _why._ ("Switching" because at the time "routing" was a euphemism for "slow" -- it was, and a lookup happening at every hop made it even slower. In simplest terms, it's a trick to only do a route lookup once, and know how the traffic will flow across the network ("path") - something frame and atm engineers knew well, but "IP" had to rediscover.)
what software does he use to make these labs/demos
Greetings according to the time zone!
I need help, my name is Patrício Mateus I am a high school student in the Computer Technician course.
I'm preparing the final project, and I'm using Mpls to interconnect two hospitals, I have mpls running but I can't connect it to the LAN network of each hospital
How do I connect the MPLS network to the network?
Why does the label change on each router?
I looked for an answer here and didn't find it.
Mr Wallace please stop drinking that and have some fresh water
Thank you so much for your kindly to up those videos!!!!So much helpfull and really wanted to say that you teach so well!!!!
I absorb more out of this video in 1 hr than the one from the Learning Network. I couldn't stay awake with those. Thank you Mr Wallace.
great video! Thank you so much!
Amazing video, finished watching it 20 seconds after upload
Ben really looking forward to this , was hoping that's it's gonna be 3h or so lol.
Thanks for the video
Thanks Kevin for this video, it was very useful.
This scenario is assuming the customers are in the same AS as the service provider, given that you are using ospf between the PE and CE.
In real-life scenarios, the customer will be in different AS. So the CE will be in a different AS as well and we will be using BGP.
Is my understanding correct here or is the CE a service provider CE?
The CE will be in another AS and then this is called L3VPN with PE-CE BGP.
One question though. The last step we did was redistribute bgp into ospf process 2. But let's say we have multiple customers. Obviously we are using the same AS number in PEs. So in that case when we redistribute BGP into ospf, wouldn't all routes in the bgp get redistributed ? Like all the routes from all the customers ?
YOu would use a separate VRF route table for each tenant.
its so great to see the same quality over and over. Great Job!
I think you leaked the Customer routes into your Cloud Core routing. The Customer facing interfaces on the PEs should be ina vrf CUST-A, which you did, then the OSPF process on the PE towards the Customer should be vrf CUST-A aware. When you redistribute BGP (ipv4 vrf CUST-A) into OSPF 2 (default vrf) you leak your Customer routes into your Core routing. The point is to have Core unaware about Customer routes, it should know only Loopbacks on R1,R2 and R3. I might be wrong though...
This session on MP-BGP on establish MPLS was a fundamental take away on MPLS establishment. On the first insight on viewing the animated treat on CE-A to CE-D and CE-B to CE-C itself was helping to understand MPLS - TE concepts and MPLS advantages - Animations are awesome
Informative video. One quick question though. Why labels are re-writen on their ways across the routers? I didn't quite catch that part.
Excellent as usual 🤠 thank you sir Kevin 😊
I’m looking forward to watching this. I’m sure it will be up to Kevin’s usual high quality training. 👍🏻
how to do it in xrv routers
I´m trying to import the lab on CML but I get this error: Failed: The API at /api/v0/import encountered an unexpected error. Please report this problem to support. / Anyone knows how to fix this? I am using the Free version of CML i think that might be issue.
Thank you so much
brat lah ti to spravis kak na 45min
Great tuto, i learned a lot knowing that i did not even got a ccnp,
M'y question : on the PE router, WE actually need to have two différent OSPF process ( two distinct process ID) ?
In case WE had multiple customers, do WE need to have différent bgp process for each client so that there would bé no leakage of différent customers's route?
Thank a lot.
can you explain the label switching how it works ?
Thanks very much for making networking concepts simple and easy to understand.
This channel and Kevin should be protected with any cost.😅
Both are gems 💎
Great explanation! Thank you Kevin!
What is the name of the interface you are typing the commands in ?
Great video! Love the Steve guy always on point :D
Beautiful ☺️ Thank you sir 🙏🏻
Kevin, thanks so much for you time. Merry Christmas to you and you family!!
Thanks, Kevin.....looking forward to more on MPLS and BGP!
Which is the network between R2 and R3 routers?
Thank you Kevin for this excellent resources
Thanks, Kevin for such helpful videos
really good video I finally understand xd
Thanks a lot Mr. Kevin and I hope a very happy holiday with your lovely family
what are the routers types used ? thank you
This I've been waiting. Thank you sir Kevin
Great video as always, thanks!! Be great to see a MPLS deep dive video just like your BGP and OSPF ones 😀
Thanks Kevin!
Hi Kevin, I am trying to understand MPLS and saw your video, which is excellent. It's the first time I've seen it, and I could follow it - up until the MP-BGP part. I am not clear why MP-BGP is needed for MPLS.
Can you please explain briefly why MP-BGP and VPN is needed for MPLS? Many thanks!
I’m glad you enjoyed the video! To answer your question, MP-BGP is not a requirement for MPLS, but it is a common real-world scenario.
You need mp bgp because you are not exchanging ipv4 routes but vpnv4 routes which is 96 bit
Great content Kevin!
Thanks for sharing
I think on R1 and R3 the key word "vrf CUST-A " was missing during the configuration of ospf from R1 and R3 to CE routers respectively.
I thought so too but I think because he enabled ospf from interface it automatically placed the process in vrf that the interface was configured for.
or wait, do you mean when doing redistributing?
@@TravonFiler yes
Thank you
Thanks
Hey Kevin, please make more SP videos! I love these videos!
I had forgotten most of these commands sincs it's been a very long time after passing my CCNP, which has alos expired.
As always, you have again made the difficult stuff to look pretty simple.
It is like watching Netflix, even if I am tired I wanted to add one more Kevin's video. I am waiting for L2VPN and TE tunnels. Thank you for making it interesting!!
Hello sir
Your a great at this i love the way you teach
Got a better understanding of QOS
Ur amazing, I love to make it big in networking industry ur truly inspiring to me
Some questions please - from the topology, all the LSRs are connected to each other but in a real-world scenario, the customer will have branches probably in two different countries and there may be so many AS between the service provider cloud. Does this change anything? What if the different AS between the service provider clouds don't have mpls activated on them (as was done on all 3 routers in the topology), do you just need to only enable mpls on routers within your (service provider) routers?
It gets a bit "messy" when crossing an AS boundary. In my experience, people rarely interconnect with MPLS, thus an "MPLS Cloud" usually has to be entirely within a single service provider's network. (not that ISP1 can't buy a path across ISP2)