Issue about mapping MAC address to Ipv6 address

Posted by deepsky on Super User See other posts from Super User or by deepsky
Published on 2011-06-26T06:17:56Z Indexed on 2011/06/26 8:24 UTC
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networking

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IPv6

I know that the address in ipv6 with prefix range 001 to 111 should use a 64-bit interface identifier that follows the EUI-64 format, which translates the MAC to ipv6 as below.

MAC:00-02-b3-1e-83-29 --> 02-02-b3-ff-fe-1e-83-29 --->ipv6 addr: fe80::202:b3ff:fe1e:8329

Then I checked my network status with ipconfig /all on my windows XP, but it seems my ipv6 address doesn't follow the above rule:

MAC:00-24-81-XX-XX-XX 
ipv6 addr:2001:da8:8006:225:0:24:81XX:XXXX

Obviously it doesn't follow the EUI-64 format. Instead it just directly use the MAC as the last 8 bytes.

Anyone know the reason? Pls Correct me if I am wrong.

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