centos：ping6未知主机

我有启用了ipv6的centos 6.5，并且正在工作（部分）。当我尝试执行“ ping6 bin6.it”时，它返回错误“未知主机”：

[root@centos ~]# ping6 bin6.it
unknown host

主机是可解析的：

[root@centos ~]# host bin6.it
bin6.it has IPv6 address 2607:fd50:1:91b0::b146:11
bin6.it mail is handled by 20 mx02.puttynuts.com.
bin6.it mail is handled by 10 mx01.puttynuts.com.

也可以Ping到ip地址：

[root@centos ~]# ping6 2607:fd50:1:91b0::b146:11
PING 2607:fd50:1:91b0::b146:11(2607:fd50:1:91b0::b146:11) 56 data bytes
64 bytes from 2607:fd50:1:91b0::b146:11: icmp_seq=1 ttl=47 time=273 ms
64 bytes from 2607:fd50:1:91b0::b146:11: icmp_seq=2 ttl=47 time=268 ms
64 bytes from 2607:fd50:1:91b0::b146:11: icmp_seq=3 ttl=47 time=268 ms
64 bytes from 2607:fd50:1:91b0::b146:11: icmp_seq=4 ttl=47 time=268 ms
--- 2607:fd50:1:91b0::b146:11 ping statistics ---
5 packets transmitted, 4 received, 20% packet loss, time 4026ms
rtt min/avg/max/mdev = 268.293/269.715/273.367/2.215 ms

怎么了？

根据要求添加：

[root@centos ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search mydomain.com
nameserver 192.168.5.34

[root@centos ~]# grep hosts /etc/nsswitch.conf
#hosts:     db files nisplus nis dns
#hosts:      files mdns4_minimal [NOTFOUND=return] dns
#hosts:      dns files mdns4_minimal
hosts:      files dns mdns4

centos ping ipv6

— 麦可
source

host直接检查DNS，同时ping6（和ping）通过名称服务交换机（NSS）将名称解析为IP地址。

检查/etc/nsswiitch.conf并确保您具有dns该hosts:条目，类似于以下内容：

hosts:      files dns myhostname

— garethTheRed
source