![]() ![]() It is also possible (but not recommended) to configure an IPv6 address manually. An administrator must configure the IPv6 address pool to be able to serve clients. Among the IP address, other information like DNS servers, lease time, hostnames, and other attributes are pushed to the client. The DHCPv6 service then keeps track of what IPv6 addresses are assigned to what clients. If the DHCPv6 variable is set to yes, then a client obtains an IP address from the DHCPv6 pool. To use DHCPv6, the following should appear within the configuration file: IPV6_AUTOCONF="no" Rather, the IPv6 address is composed with a technique called the Extended Unique Identifier (EUI-64) where 16 bits are added to the Media Access Control (MAC) address (which has 48 bits), thus creating a globally unique IPv6 address. We use the term stateless because there is no service to keep track of what IPv6 addresses have been assigned to clients. The technique applied here is the one explained in the previous article’s Multicast section, where there is an exchange of client solicitation and router advertisement ICMPv6 messages. ![]() If the IPV6_AUTOCONF variable is set to yes, then the SLAAC method is used to configure the host’s IPv6 address by using the Neighbor Discovery Protocol (NDP). How well do you know Linux? Take a quiz and get a badge.Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.Stateless address autoconfiguration (SLAAC) IPV6_ADDR_GEN_MODE="stable-privacy" ← IPv6 stable-privacy addressing s(RFC7217)įor more information on what those connection settings do, run: man nm-settings-ifcfg-rh ![]() IPV6_FAILURE_FATAL="no" ← Opposite of ‘may-fail’ IPV6_DEFROUTE="yes" ← The default IPv6 route is assigned to the interface IPV6_AUTOCONF="yes" ← Accept Router Advertisements (RA’s) IPV6INIT="yes" ← Enable initialization on the interface These are the lines in the configuration file where the magic happens (I am adding some explanation to each line): ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp1s0 Configuring IPv6 on RHEL 7 and 8Ī Red Hat Enterprise Linux system is configured to obtain an IPv6 address automatically. We will mainly focus on configuring an IPv6 address on a Red Hat Enterprise Linux (RHEL) 7 and 8 systems and briefly explain different assignment methods. As I mentioned in What you need to know about IPv6, different methods exist to configure an IPv6 address on a machine. ![]()
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