Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 313

Ethernet 1/1/1:1 up / up fe80::eef4:bbff:fefb:f9f0/64 2017::1/64 Enabled Ethernet 1/1/20 up / up fe80::eef4:bbff:fefb:fa30/64 2020::1/64 Enabled Management 1/1/1 up / up fe80::eef4:bbff:fefb:f9ef/64 Enabled Vlan 1 up / up fe80::eef4:bbff:fefb:fa59/64 Enabled IPv6 addresses An IPv6 address consists of a 48-bit global routing prefix, optional 16-bit subnet ID, and a 64-bit interface identifier in the extended universal identifier (EUI)-64 format. IPv6 128-bit addresses are represented as a series of eight 16-bit hexadecimal fields separated by colons: x:x:x:x:x:x:x:x. 2001:0db8:0000:0000:0000:0000:1428:57a Leading zeros in each field are optional. You can also use two colons (::) to represent successive hexadecimal fields of zeros, but you can use this short version only once in each address: 2001:db8::1428:57ab In the following example, all the addresses are valid and equivalent: • 2001:0db8:0000:0000:0000:0000:1428:57ab • 2001:0db8:0000:0000:0000::1428:57ab • 2001:0db8:0:0:0:0:1428:57ab • 2001:0db8:0:0::1428:57ab • 2001:0db8::1428:57ab • 2001:db8::1428:57ab IPv6 networks are written using CIDR notation. An IPv6 network (or subnet) is a contiguous group of IPv6 addresses the size of which must be a power of two. The initial bits of addresses, which are identical for all hosts in the network, are the network's prefix. A network is denoted by the first address in the network and the size in bits of the prefix (in decimal), separated with a slash. Because a single host is seen as a network with a 128-bit prefix, host addresses may be written with a following /128. For example, 2001:0db8:1234::/48 stands for the network with addresses 2001:0db8:1234:0000:0000:0000:0000:0000 through 2001:0db8:1234:ffff:ffff:ffff:ffff:ffff. As soon as an IPv6 address is assigned, IPv6 packet processing is enabled on an interface. You can manually disable and re-enable IPv6 processing on an interface configured with an IPv6 address using the no ipv6 enable and ipv6 enable commands. To remove all IPv6 addresses from an interface, use the no ipv6 address command. To remove a specific IPv6 address, use the ipv6 address ipv6-address/mask command. Link-local addresses When an OS10 switch boots up, an IPv6 unicast link-local address is automatically assigned to an interface using stateless configuration. A link-local address allows IPv6 devices on a local link to communicate without requiring a globally unique address. IPv6 reserves the address block FE80::/10 for link-local unicast addressing. Global addresses To enable stateless autoconfiguration of an IPv6 global address and set the interface to Host mode, use the ipv6 address autoconfig command. The router receives network prefixes in IPv6 router advertisements (RAs). An interface ID is appended to the prefix. In Host mode, IPv6 forwarding is disabled. Layer 3 313