[CentOS-mirror] discussion about ipv6 availability for msync.centos.org

[Anssi Johansson]

24.5.2016, 9.22, Kasparek Tomas kirjoitti:
> Please add IPv6 for merlin.fit.vutbr.cz (CZ):
>
> kasparek at pckasparek: ~$ host merlin.fit.vutbr.cz
> merlin.fit.vutbr.cz has address 147.229.176.19
> kasparek at pckasparek: ~$ host merlin6.fit.vutbr.cz
> merlin6.fit.vutbr.cz has IPv6 address 2001:67c:1220:8b0::93e5:b013

In general, in this day and age it is recommended to just add an AAAA 
DNS record for the main mirror hostname instead of creating a new 
IPv6-only hostname.

When clients access mirrorlist.centos.org over IPv6, they will receive 
only mirrors that are available over IPv6. See curl -6 
'http://mirrorlist.centos.org/?repo=os&arch=i386&release=6&cc=cz'

This means that IPv6-enabled CentOS installations within your network 
are currently being directed to use some other mirror instead of your 
local mirror.

If you add an IPv6 DNS entry for your mirror, the IPv6 mirror crawler 
will pick up the change automatically within a few hours and add the 
mirror to the list of IPv6-enabled mirrors.