Redhat 5 disables IPv6 and redhat5 disables ipv6

Redhat 5 disables IPv6 and redhat5 disables ipv6
Redhat 5 Disable IPv6

IPv6 has not been fully popularized yet, but IPv6 is effective after the system is installed, which affects network performance to a certain extent. Therefore, we recommend that you disable IPv6. Now we will describe how to disable it in the complete steps in this article.

1. Modify/etc/sysconfig/network and change the second line to no:

NETWORKING=yesNETWORKING_IPV6=noHOSTNAME=db01NOZEROCONF=yes

 

2. Modify/etc/hosts and comment out the local host name resolution in ipv6:

#::1   localhost localhost6 localhost6.localdomain6

 

3. to prevent the system from loading ipv6-related modules, You need to modify the modprobe configuration file. For ease of management, we create a new configuration file/etc/modprobe. d/6off. conf. The content is as follows:

alias net-pf-10 offoptions ipv6 disable=1

Note: If you use the NIC binding (bond) technology and do not want ipv6, use the first method. Otherwise, the bonding module may fail to be loaded when the system starts.

4. restart the system and then confirm:

[root@db01 ~]# ifconfig | grep -i inet6[root@db01 ~]#

If the execution result of the preceding command is not displayed, it indicates that ipv6 has been completely disabled.

Centos65, IPv6 module disabled

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How does redhat automatically obtain an ipv6 address through dhcp?

In addition to Kernel support for ipv6, is there such a setting?
# Cat/etc/sysconfig/network
...
NETWORKING_IPV6 = yes
...

Cp/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/network-scripts/ifcfg-eth1.