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28.3 ipv6 address anycast
Use the ipv6 address anycast command in Interface Configuration mode to
configure a global unicast IPv6 Anycast address and enable IPv6 processing on an
interface. To remove the address from the interface, use the no form of this
command.
Syntax
ipv6-prefix
ipv6 address
ipv6-prefix
no ipv6 address [
Parameters
•
ipv6-address
—Specifies the global unicast IPv6 address assigned to the
interface. This argument must be in the form documented in RFC4293
where the address is specified in hexadecimal using 16-bit values between
colons.
•
prefix-length
—The length of the IPv6 prefix. A decimal value that indicates
how many of the high-order contiguous bits of the address comprise the
prefix (the network portion of the address). A slash mark must precede the
decimal value.
Default Configuration
No IP address is defined for the interface.
Command Mode
Interface Configuration mode
User Guidelines
An Anycast address is an address that is assigned to a set of interfaces that
typically belong to different nodes. A packet sent to an Anycast address is
delivered to the closest interface—as defined by the routing protocols in use—
identified by the Anycast address. Anycast addresses are syntactically
indistinguishable from Unicast addresses because Anycast addresses are
allocated from the Unicast address space. Nodes to which the Anycast address is
assigned must be explicitly configured to recognize that the address is an Anycast
address.
Anycast addresses can be used only by a router, not a host, and Anycast
addresses must not be used as the source address of an IPv6 packet.
prefix-length
/
anycast
prefix-length
/
]
Cisco Sx350 Ph. 2.2.5 Devices - Command Line Interface Reference Guide
IPv6 Commands
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