IPv6 link local addressing

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Jun 10th, 2010
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Hi al

With IPv6 link local addressing, Is the interface ID the mac address of the card? if not where does it get the 64 bit address from? and with link local, would vlans seperate this, or would they seperate the site local addresses ?

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Giuseppe Larosa Thu, 06/10/2010 - 09:18
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Hello Carl,

the interface-id is derived by the 48 bits of MAC address with a transformation called eui-64 that creates a 64bit number


link local is local so it does not go beyond a single broadcast domain

Vlans can be used to separate site local ip addresses (that are now have become unique local see http://tools.ietf.org/html/rfc4193)

Hope to help



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