What is an IPv6 Anycast Address?

Tagged: IPv6

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- August 3, 2020 at 11:31 am #14006
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  What is an IPv6 Anycast Address?
- August 3, 2020 at 11:32 am #14007
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  In IPv6, an anycast address is assigned to more than one IPv6 interface. Many interfaces on different hosts can have the same anycast IPv6 address. If a router receives an IPv6 packet with an anycast address as the destination address, the router measures which is the nearest host using routing protocols and delivers the packet to the nearest host.
  
  In IPv6, anycast addresses are syntactically indistinguishable from unicast addresses. An anycast address uses the same format as that of a unicast address. The difference is, an anycast address is assigned to more than one interface on different hosts. The host that is assigned an anycast address should be properly configured to indicate that the assigned IPv6 address is an anycast address.
  
  Anycast addresses are used in many scenarios. For example, let’s say an organization has a set of routers to provide Internet service. The routers can be assigned one anycast address. The anycast address can identify the set of routers. Anycast addresses can also be used to identify a set of routers attached to a particular subnet.
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