Blade ICE G8124 Manuale Utente

BMD00220, October 2010

Chapter 16: Internet Protocol Version 6  

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Packets sent to an anycast address or list of addresses are delivered to the nearest interface identified 
by that address. Anycast is a communication between a single sender and a list of addresses. 

Anycast addresses are allocated from the unicast address space, using any of the defined unicast 
address formats. Thus, anycast addresses are syntactically indistinguishable from unicast addresses. 
When a unicast address is assigned to more than one interface, thus turning it into an anycast 
address, the nodes to which the address is assigned must be explicitly configured to know that it is 
an anycast address. 

IPv6 supports the following types of address autoconfiguration: 

Address configuration is based on the use of a stateful address configuration protocol, such as 
DHCPv6, to obtain addresses and other configuration options.

Address configuration is based on the receipt of Router Advertisement messages that contain 
one or more Prefix Information options. 

BLADEOS 6.5 supports stateless address configuration. 

Stateless address configuration allows hosts on a link to configure themselves with link-local 
addresses and with addresses derived from prefixes advertised by local routers. Even if no router is 
present, hosts on the same link can configure themselves with link-local addresses and 
communicate without manual configuration.