A couple of points about Wireshark: While you used a display filter, there are also capture filters. The display filters what you have received, so that you see only what you're looking for, but other stuff has also been captured. A capture filter controls what's captured. Of course, you can use both for maximum flexibility. Also, I have Wireshark configured with panels 2 & 3 on the same level, with 3 occupying only the minimum space required, leaving the rest of the space for panel 2. I have panel 1 at the top, taking full width. I find this provides the most info, with the best use of display space. Any ISP that changes the prefix daily is incompetent. There is an RFC, I don't recall the number at the moment, that says the prefix should be consistent. I've had the same prefix for a few years, surviving replacing both the cable modem and the computer I run my firewall/router (pfSense) on. With SLAAC privacy addresses the suffix changes daily, which should take care of security concerns. For servers, you'd use the SLAAC persistent address, often based on the MAC, which the DNS can point to. One important point to remember with IPv6 is the address space is so sparse, it's hard to find a target, even if they know the prefix. A single /64 prefix, which is what's on a LAN, contains 18.4 billion, billion addresses. It would take a *LOT* of scanning for an attacker to find a target. Also, Android devices won't work with DHCPv6. As for multicast, as you mentioned, recipients must belong to the multicast group. However, some are automatic. For example, all devices belong to the all nodes group and all routers belong to the routers group, etc.. There is also a special multicast type, used for neighbour solicitation. It's called solicited node multicast, where the 24 right most bits of the target address are used for the right most address bits of the multicast group. This means there's only a 1 in 16 million (2^24) chance of an unwanted device responding to the multicast.

Absolutely terrific explanations. I love how you made analogies to Radio and emergency numbers for multi-cast and any-cast. Terrific!

I hope I speak for everyone when I say - YAY a third video in the series. This has been my first introduction to your content and I find it a very nice overview of IPv6 thank you!

Thank you for taking the time to put this together. I have to admit, for several years part of me has been wishing that IPv6 will just "go away" and be replaced with something that's a bit easier to understand. However, since this isn't going to realistically happen, I'm diving head first into your guides. I'm patiently waiting for your "Best way to do all of this in OpenWRT" video before enabling anything as I don't wish to inadvertently create a security hole or bridge an isolated subnet/VLAN. Thanks again!

This is amazing series. Can't wait for next episode.

Marc you are an absolute genius! A wonderful instructor and a brilliant technologist, THANKS!

I have never been interested in IPv6 very much before watching your videos, but actually it's very interesting. thank you very much :D

我太爱这个视频了，能聆听网络专家的讲解是我的荣幸！

thank you so much for you videos such a precious content and your simplified explanation .Much respect and support from morocco

Großartiges Video. Wie immer. Ist wirklich Klasse wenn du weiter IP6 ausbaust in einer Serie.

Great video Marc ! This was really informative. I love the idea of making a long series about this as it will be useful in the near future as we move slowly from IPv4 and given the fact that IPv6 has been around for so long yet we know very little about it makes it even more interesting.

Excellent video! Love the idea of demystifying IPv6.

I really love this series and how you made it relate to real-life applications. I'm definitely going to expermiment w/ ipv6 in my homelab now.

Thank you for making this video and sharing it with all of us! I am, of course, subscribed with notifications turned on, and thumbs up!

So much detailed information presented succinctly and logically. Excellent, thanks!

Thank you. It was worth the wait.

All your videos are great man!

Thanks for the Videos about IPv6. I have had the same problem with v6, to find similar points like v4. This two IPv6 Videos open my eyes. I also enjoy your OpenWRT Videos, learned a lot by watching them. Gruß aus Köln.

Thank you so much. I am beginning to understand now!

Great videos Marc

Thank you very much for your effort! It was a great explanation! Really funny how I'm just now trying to implement v6 in our OpenStack Cloud XD

Good vid!

Thank you for part 2 😀❤️

Your videos are getting better over the time. Congrats! But i'm unable to see wheres the next part😅

I will definitely need to watch it again, I need to really simulate the examples you showed here with a local IPV6 network and then see what I can simulate with the dynamic IPv6 address my provider assigns to my router. Nevertheless, thank you so much again for sharing the great knowledge!

Thank you! ♥

I'm waiting on the next episode 😎

Great video Mark. When can we expect the next video on dual stack? Also could you put the series of videos in a playlist?

Awesome

Waiting the video about how setup properly IPv6 on OpenWRT 🙂

Keep in mind that Android has a major flaw in that it does not work with dhcpv6!! There's a ticket that's been open for nearly 14 years.

Hi! Thanks for this video. Your presentation was very understandable. You mentioned Dual-Stack. Since you have also made Proxmox videos... How about a video zu incorporate IPv6 into an existing infrastructure... All videos I've seen so far don't address this (or they have all VMs on their router backbone). My Proxmox has 6 internal networks on separate virtual NICs and each network has it's own subnet. What does one have to do and configure, so that all the VMs and containers get an proper IPv6 address and that the routing works (also from and to the outside world). Thanks again!

Thank you for continuing this series of videos on IPv6. I like your approach of teaching it as a knowledge building experience rather than just presenting everything about IPv6 in a bulk data dump, with no reference for using the various components. One thing I noticed that you did not touch on is EUI-64 addressing. Is this now considered less secure, and so its use is discouraged? One other comment. I’ve noticed that on my home network (dual stack) using SLAAC for IPv6 addressing, it is much more difficult to identify the devices on the network. In the IPv4 DHCP world, or with IPv4 static IP addressing, it is much easier to identify the devices based on IPv4 address. For IPv6 and SLAAC, and dual stack, I find myself looking at the MAC address of the device, and then looking up its IPv4 address in the ARP table to figure out which device it is. Is there a better way of doing this and remaining in the IPv6 realm?

And don't be sorry about another couple of videos on v6! v6 is totally underrated and needs all the attention it can get!

My ISP is now providing IPv6 on my main modem/router. My Openwrt router is connected to main router but i dont know how to configure IPv6 in downstream. Waiting for IPv6 configuration on OpenWRT

Great video and good explanation as usual Mark,i would like to see a video about configuring an Open Portal on Opnwrt as well.Thanks and keep up the good work,like and subscribed👍🏻

How about the IPv4 / IPv6 dual stack video? 😛

May I ask what software you use to make your videos, they are really great!

Are those multicast pings supposed to work in an everyday dualstack network? Because I have tried at home, work and in the cloud, and while I regularly use IPv6 (even installed a plugin that tells you what site uses IPv6, as I wanted to see how common it was), and definitve can ping with IPv6 against normal endpoints, local and global, nothing with ff02 ever works anywhere, and those are all provided by entirely different network designs and companies as well as different OSs and clients. Not saying it's not great for you to explain it truly the simple way. Certainly seems like an interesting concept in comparison to trying to rely on Layer 2 things like ARP requests, that shouldn't even exist.

I am watching from my phone which screen is very tiny, not letting me see the details from Wireshark. Hopefully, I will have the chance to watch this video from my desktop. And yes, coming from IP V4, this is like magic, especially dynamic address server configuration, a real headache.

Do you know anything about net neutrality

can anyone provide good material how to set ipv6 lan with raspberry pi as a router?

Interestingly when I try to ping ff02::1 or ff02::2, it never works on any of my linux boxes or Macs but will only work on my openwrt routers

ping6 ff02::1 (or ff02::2 for that matter) doesn't work on my home network, although that has ipv6 full enabled on all machines (and I am connected by dual-stack to the internet). I tried it on a raspberry and a macOS machine. Edit: never mind. Found that one needs to specify the interface to use (which kind of makes sense) for this to work: ping6 ff02::1%en0.

Sounds like you have a really high interest loan. You should be trying to reconsolidate into something better. Get the smallest possible payment, and then do double payments every month and it will go down much faster since every payment above the minimum reduces the principal.

One thing to note is that Android *does not* and *will not* support DHCPv6 because Google doesn't want to support it ...

Too bad my router blocks those fun ff02 addresses

How do you use dhcpv6 with Android ? 😂