Thanks so much for this, Keith. I was doing an assignment and was stumped, but your video helped me grasp it better than reading slides off of a presentation and trying to teach myself.
Thanks a million. I can't tell you how many videos I've watched to try and understand this. The other videos address it as if the person watching it is a tenured network tech. The videos go on for 30+ minutes, and by the time it's done, you're even more confused. This video is so basic, simple and to the point, ESPECIALLY showing HOW to count to get to the 7th bit
Thanks Keith, I did HORRIBLE at your Kahoot quiz yesterday and a big part of my bad performance was due to my woefully bad understanding of EUI-64 bit flipping. This vid opened my eyes, Thank you.
This is spooky, just started to refresh ipv6 today and I see a reference to the flipped bit... I was thinking 🤔 hmmm what was that all about again. Then boom this video pops up. Perfect timing thanks Keith. 👍🏻
Thank you so much for this you made it fun and practical, reading the book on this was very confusing you made it seem very easy to understand. Thanks once again it helps a ton !
Thanks for awesome videos, @keith ! Really helpful! Question - what's the ipv4 equivalent of the eui-64? i feel like i have a good grasp of ipv4 and now trying to understand ipv6 as well.. i understand ipv4 has different types of addresses like unicast and multicast etc and host and network portions, so to which of those would you compare eui-64? i'm trying to understand what it represents in terms of addresses... Would appreciate an explanation if possible please - thanks so much!!
it's nice not having to change the playback speed to 1.25 or 1.5 which I have to for almost all other networking videos. Quick and to the point. I'll be watching more of your videos sir.
Just one correction: With the U/L bit, you said it backwards. The values are: 0 = Universal and 1 = Local. Burnt in MAC addresses always have a 0 in that bit. When a user changes the MAC address using a command, this is a locally administered address, and SHOULD have a 1 in that bit. Some vendors enforce this, and when you change your MAC address they automatically make the U/L bit a 1. Your Cisco router does not enforce the rule. If it did, it would not allow you to set your MAC address to 0088.8888.8888. It would either reject the command, or it would automatically change the bit, and your MAC address in running-config would be 0288.8888.8888.
Great demo!!! I would add, don't freak out if you see a well known practice exam series that gets this wrong, and provides an incorrect explanation based on some old thinking of how the 7th bit might be used, but was never implemented. Trust that the 7th bit (3rd bit of 2nd nibble) "Always" flips in UEI-64 :)
Yes, this is true in the context of IPv6 discussion. The actual EUI-64 standard does not flip the bit. However, IPv6 always uses Modified EUI-64, which means it performs EUI-64 and then flips the 7th bit. In most IPv6 documentation, they leave off the word "modified" and just call it EUI-64.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Thanks so much for this, Keith. I was doing an assignment and was stumped, but your video helped me grasp it better than reading slides off of a presentation and trying to teach myself.
Glad it helped!
I am amazed every time i watch your video’s, you can literally break it down for even a baby to understand.
Thanks for all you do!!!
Thank you msconfig!
Thanks for explaining this!
You bet!
Thanks a million. I can't tell you how many videos I've watched to try and understand this. The other videos address it as if the person watching it is a tenured network tech. The videos go on for 30+ minutes, and by the time it's done, you're even more confused. This video is so basic, simple and to the point, ESPECIALLY showing HOW to count to get to the 7th bit
Glad it helped!
Thank you so much, Keith. I was beginning to lose my mind trying to figure out IPv6 addressing. I am now confident I can master it.
One of the best teacher. Thanks Kieth
Thank you Manoj Memane!
Thank you, I was reading the study guide and it just wasn't clicking, now I get!
Thank you @digitaldistancerecords736!
OMG , this really help me , very straight forward
Thank you @WasiuAbbey-sq8hp!
Thanks Keith, I did HORRIBLE at your Kahoot quiz yesterday and a big part of my bad performance was due to my woefully bad understanding of EUI-64 bit flipping. This vid opened my eyes, Thank you.
Happy to do it, thanks for the feedback Albert Taylor.
Love your videos keith. Keep up the great work!
Thanks, will do!
Thank you Keith.
Happy to do it, thanks for the feedback Ibrahim Barrie.
This is spooky, just started to refresh ipv6 today and I see a reference to the flipped bit... I was thinking 🤔 hmmm what was that all about again. Then boom this video pops up. Perfect timing thanks Keith. 👍🏻
Thank you sidefmovies!
very well explained thank you
Glad it was helpful!
This is great. Thanks for the amazing content Keith. 👏🏻
Thank you César Sulecio!
Your are great sir Keith
Thank you Alexis Anyanwu!
Thank you so much for this you made it fun and practical, reading the book on this was very confusing you made it seem very easy to understand. Thanks once again it helps a ton !
You are so welcome!
Thanks for awesome videos, @keith ! Really helpful! Question - what's the ipv4 equivalent of the eui-64? i feel like i have a good grasp of ipv4 and now trying to understand ipv6 as well.. i understand ipv4 has different types of addresses like unicast and multicast etc and host and network portions, so to which of those would you compare eui-64? i'm trying to understand what it represents in terms of addresses... Would appreciate an explanation if possible please - thanks so much!!
Thank you for the question Y M. There is no IPv4 equivalent function or feature of auto-creating a host address like IPv6 does with eui-64.
Great content keep up the good work!
Thanks, will do!
Thanks mate, I got it straight away
Thank you @frankbravo581!
Asante Sana kieth
damn man great vid!! was using a udemy course and the guy glanced right over this and had me so confused!!!
explained perfectly!
Happy to do it, thanks for the feedback JT.
gracias
Thanks a lot 👍
Thank you Sukumar Akoju!
it's nice not having to change the playback speed to 1.25 or 1.5 which I have to for almost all other networking videos. Quick and to the point. I'll be watching more of your videos sir.
Thank you Mike C!
Just one correction: With the U/L bit, you said it backwards. The values are: 0 = Universal and 1 = Local. Burnt in MAC addresses always have a 0 in that bit. When a user changes the MAC address using a command, this is a locally administered address, and SHOULD have a 1 in that bit. Some vendors enforce this, and when you change your MAC address they automatically make the U/L bit a 1. Your Cisco router does not enforce the rule. If it did, it would not allow you to set your MAC address to 0088.8888.8888. It would either reject the command, or it would automatically change the bit, and your MAC address in running-config would be 0288.8888.8888.
You inspire me to be a better IT dude :) Thank you.
Wow, thanks
So if I have a MAC of 18:fc:b6:42:d1:cc, then my Link Local would be FE80::1afc:b6ff:fe42:d1cc ?
Thank you for the question Michael Darwin. Yes, you nailed it.
Excellent
Thank you! Cheers!
very well put... still for the exam, you need to flip that bit in your mind. It still feels a bit spooky to go and do it in like 10-15 seconds
Thank you Zsolt Kiss-Székely
In Cisco Course on Netacad, zero are omitted and the 7th bit calculated from 88 (1000 1000) will be 8a (1000 1010)
Thank you Ahmed Ali!
@@KeithBarker I have reviewed many examples, I find your approach is correct.
Brilliant
Thank you Chris Yo!
Now that I think about, 000000X0 would be a pretty cool tattoo.
You’re awesome
Thank you Charles Yaw
why they flip it ? what is actual reason behind flipping 7th bit ?
pls tell me if you now know
What is the point of flipping the 7th bit ?
pls tell me if you now know
@@mouadjadil2958 yes I got it. Thank you.
Great demo!!! I would add, don't freak out if you see a well known practice exam series that gets this wrong, and provides an incorrect explanation based on some old thinking of how the 7th bit might be used, but was never implemented. Trust that the 7th bit (3rd bit of 2nd nibble) "Always" flips in UEI-64 :)
Exactly! Thank you Morgan.
Yes, this is true in the context of IPv6 discussion. The actual EUI-64 standard does not flip the bit. However, IPv6 always uses Modified EUI-64, which means it performs EUI-64 and then flips the 7th bit. In most IPv6 documentation, they leave off the word "modified" and just call it EUI-64.
First to like, Keith
Thank you Keith.
Excellent
Thank you Gustas Dirgela!
Thank you Keith Sir
Welcome!