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#ipv6

21 posts16 participants0 posts today
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gyptazy

Oops! The MXP01 (Italy) peer had some fuck ups, followed by some insane traffic f*ckups at 3AM & 6AM on the other instances.

Rule Nr. 1: Even changing a single character can result in f*ckups. Always test!

#devops#bgp#peering
Public
Jens Link

As I mentioned, IPv6 tutorial videos here:

mastodon.social/@quux/11428008

I do have a rather large list of topics, but feel free to add a suggestion in the comments, and I'll see what I can do (and in which order).

And I promise, that I will have some first results in the next couple of days.

MastodonJens Link (@quux@mastodon.social)@ryan@social.binarydad.com Yes, you should learn IPv6. You can find a collection of training material here: https://gitlab.com/jenslink/ipv6-resources/-/blob/main/resources.md?ref_type=heads BTW, In many cases you don't need DHCPv6, you can just use router advertisements to configure your clients. And if you are running Android, DHCPv6 does not work at all. I really should start working on the IPv6 tutorial YouTube videos... #IPv6
#IPv6
Public
Jens Link

@ryan

for the authoritative side:

When you put AAAA and A records into DNS, IPv6 enabled clients will try IPv6 first and then fall back to IPv4. So Configure and test your systems first, then configure the DNS records.

HTTP / HTTPS are an exception here, they are using something called HappyEyeballs.

datatracker.ietf.org/doc/html/

Logo of the IETF
IETF DatatrackerRFC 8305: Happy Eyeballs Version 2: Better Connectivity Using ConcurrencyMany communication protocols operating over the modern Internet use hostnames. These often resolve to multiple IP addresses, each of which may have different performance and connectivity characteristics. Since specific addresses or address families (IPv4 or IPv6) may be blocked, broken, or sub-optimal on a network, clients that attempt multiple connections in parallel have a chance of establishing a connection more quickly. This document specifies requirements for algorithms that reduce this user-visible delay and provides an example algorithm, referred to as "Happy Eyeballs". This document obsoletes the original algorithm description in RFC 6555.
#IPV6
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Jens Link

@ryan

For the resolver side:

When you only have an IPv4 resolver configured, your clients will only use this one. When your clients get an IPv6 resolver, either via Router Advertisement or DHCPv6, they will try that one. They should fall back.

As with any service: Configure the service first, check the connection, then configure your clients to use the service.

#IPv6
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Jens Link

@ryan Yes, you should learn IPv6.

You can find a collection of training material here:

gitlab.com/jenslink/ipv6-resou

BTW, In many cases you don't need DHCPv6, you can just use router advertisements to configure your clients. And if you are running Android, DHCPv6 does not work at all.

I really should start working on the IPv6 tutorial YouTube videos...

GitLabresources.md · main · Jens Link / IPv6 Resources · GitLabGitLab.com
#IPv6
Public
Ryan Peters

For those that run a homelab with DNS and DHCP, are you using IPv6? I'm running BIND and debating if I need to configure IPv6 just to future-proof myself. I'm not seeing any issues, at least any that I notice.

Also, I know little about IPv6, so I admit I need to do some learning.

#homelab#dns#dhcp
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