Brocade Communications Systems 6650 Full Layer 3 IPv6 feature support, IPv6 addressing overview

Full Layer 3 IPv6 feature support 5

•IPV6 routing protocols – Various chapters

Full Layer 3 IPv6 feature support

The following IPv6 Layer 3 features are supported:

•IPv6 unicast routing (multicast routing is not supported)

•OSPF V3

•RIPng

•IPv6 ICMP redirect messages

•IPv6 route redistribution

•IPv6 static routes

•IPv6 over IPv4 tunnels in hardware

•IPv6 Layer 3 forwarding

IPv6 addressing overview

IPv6 was designed to replace IPv4, the Internet protocol that is most commonly used currently throughout the world. IPv6 increases the number of network address bits from 32 (IPv4) to 128 bits, which provides more than enough unique IP addresses to support all of the network devices on the planet into the future. IPv6 is expected to quickly become the network standard.

An IPv6 address is composed of 8 fields of 16-bit hexadecimal values separated by colons (:). Figure 9 shows the IPv6 address format.

FIGURE 9 IPv6 address format

Network Prefix

Interface ID

HHHH HHHH HHHH HHHH HHHH HHHH HHHH HHHH

128Bits

HHHH = Hex Value 0000 – FFFF

As shown in Figure 9, HHHH is a 16-bit hexadecimal value, while H is a 4-bit hexadecimal value. The following is an example of an IPv6 address.

2001:DB8:0000:0200:002D:D0FF:FE48:4672

Note that this IPv6 address includes hexadecimal fields of zeros. To make the address less cumbersome, you can do the following:

•Omit the leading zeros; for example, 2001:0:0:200:2D:D0FF:FE48:4672.

•Compress the successive groups of zeros at the beginning, middle, or end of an IPv6 address to two colons (::) once per address; for example, 2001:DB8::200:2D:D0FF:FE48:4672.

When specifying an IPv6 address in a command syntax, keep the following in mind:

•You can use the two colons (::) only once in the address to represent the longest successive hexadecimal fields of zeros

Brocade ICX 6650 Administration Guide	101
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