On 09/07/2014 10:22 PM, Александр Кириллов wrote:

This is an ipv6-enabled system and that's probably why yum tries to get
an ipv6 address first for mirror.centos.org and fails miserably. For
whatever reason I do not get an authoritative negative response for AAAA
query from upstream servers. Well an easy fix is to hardcode an ipv4
address for mirror.centos.org in /etc/hosts and forget it. I suspect
miconfiguration on centos.org side as scl is the only  repo which gives
me troubles but don't have the time to dig into this.
According to this man pages:
http://man7.org/linux/man-pages/man5/yum.conf.5.html

It seems like yum.conf have a specific config like that:
   ip_resolve Determines how yum resolves host names.

              `4' or `IPv4': resolve to IPv4 addresses only.

              `6' or `IPv6': resolve to IPv6 addresses only.


Is it helping you?

Eliezer
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