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length of the general prefix. Therefore, depending on the value
specified by the Prefix Length, some of the address bits entered in the
IPv6 Address field may be appended to the general prefix. However,
if the Prefix Length is shorter than the general prefix, then the length
of the general prefix takes precedence, and some of the address bits
entered in the IPv6 Address field will be ignored.
• Address Type – Defines the address type configured for this
interface.
• Link Local – Configures an IPv6 link-local address.
- The address prefix must be FE80.
- You can configure only one link-local address per interface.
- The specified address replaces a link-local address that was
automatically generated for the interface.
• EUI-64 (Extended Universal Identifier) – Configures an IPv6
address for an interface using an EUI-64 interface ID in the low
order 64 bits.
- When using EUI-64 format for the low-order 64 bits in the host
portion of the address, the value entered in the IPv6 Address field
includes the network portion of the address, and the value in the
Prefix Length field indicates how many contiguous bits (from the
left) of the address comprise the prefix (i.e., the network portion
of the address). Note that the value specified in the IPv6 Address
field may include some of the high-order host bits if the specified
prefix length is less than 64 bits. If the specified prefix length
exceeds 64 bits, then the bits used in the network portion of the
address will take precedence over the interface identifier.
- IPv6 addresses are 16 bytes long, of which the bottom 8 bytes
typically form a unique host identifier based on the device’s MAC
address. The EUI-64 specification is designed for devices that use
an extended 8-byte MAC address. For devices that still use a
6-byte MAC address (also known as EUI-48 format), it must be
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