Category: IPv6

The second part of an IPv6 unicast or anycast address is typically a 64-bit interface identifier used to identify a host’s network interface. A 64-bit interface ID is created by inserting the hex value of FFFE in the middle of the Read More …

Here is a summary of the most common address prefixes in IPv6: Prerequisites for 200-301 200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, Read More …

Multicast addresses in IPv6 are similar to multicast addresses in IPv4. They are used to communicate with dynamic groupings of hosts, for example all routers on the link (one-to-many distribution). Here is a graphical representation of the IPv6 multicast packet: Read More …

The following table summarizes the major differences between IPv4 and IPv6:   Feature IPv4 IPv6 Address length 32 bits 128 bits Address representation 4 decimal numbers from 0-255 separated by periods 8 groups of  4 hexadecimal digits separated by colons Read More …

RIPng is an extension of RIP developed for support of IPv6. Here are some of its features: just like RIP for IPv4, it uses hop count as the metric sends updates every 30 seconds RIPng messages use the UDP port Read More …

Link-local IPv6 addresses have a smaller scope as to how far they can travel: only within a network segment that a host is connected to. Routers will not forward packets destined to a link-local address to other links. A link-local Read More …

Unique local IPv6 addresses have the similar function as IPv4 private addresses. They are not allocated by an address registry and are not meant to be routed outside their domain. Unique local IPv6 addresses begin with FD00::/8. A unique local Read More …

IPv6 global addresses are similar to IPv4 public addresses. As the name implies, they are routable on the internet. Currently IANA has assigned only 2000::/3 addresses to the global pool. A global IPv6 address consists of two parts: subnet ID Read More …

Cisco routers do not have IPv6 routing enabled by default. To configure IPv6 on a Cisco routers, you need to do two things: enable IPv6 routing on a Cisco router using the ipv6 unicast-routing global configuration command. This command globally Read More …

Unicast addresses represent a single interface. Packets addressed to a unicast address will be delivered to a specific network interface. There are three types of IPv6 unicast addresses: global unicast – similar to IPv4 public IP addresses. These addresses are Read More …