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Chris
Asked: 2015-04-13 05:21:37 +0800 CST

Two global IPv6 addresses?

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What is the scope of the second IPv6 address fdee:de36:ce2c:0:174:d4b5:64b7:33f9 ? Netsh confirms that both are global/public. Is there any reason I get 2 global IPv6 addresses?

Wireless LAN adapter Wi-Fi:

Connection-specific DNS Suffix  . :
Description . . . . . . . . . . . : Dell Wireless 1395 WLAN Mini-Card
Physical Address. . . . . . . . . : 00-1F-E1-83-97-2A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2a02:2f07:6171:ce00:174:d4b5:64b7:33f9(Preferred)
IPv6 Address. . . . . . . . . . . : fdee:de36:ce2c:0:174:d4b5:64b7:33f9(Preferred)
Temporary IPv6 Address. . . . . . : 2a02:2f07:6171:ce00:78fc:b337:93ac:fb6b(Preferred)
Temporary IPv6 Address. . . . . . : fdee:de36:ce2c:0:78fc:b337:93ac:fb6b(Preferred)
Link-local IPv6 Address . . . . . : fe80::174:d4b5:64b7:33f9%3(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.122(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Sunday, April 12, 2015 12:29:05 AM
Lease Expires . . . . . . . . . . : Monday, April 13, 2015 3:20:04 PM
Default Gateway . . . . . . . . . : fe80::cab3:73ff:fe32:3dfa%3
                                    192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1

Update: Ok, fdee:de36:ce2c:0:174:d4b5:64b7:33f9 is definitely not a global IPv6 address, because it fails to connect to a remote address. But what is it? It's not a site-local either according to MSDN.

ipv6

1 Answers

  1. Best Answer

    The fdee:... addresses are part of the Unique Local Unicast allocation (fc00::/7).

    These addresses are called Unique Local IPv6 Unicast Addresses and are abbreviated in this document as Local IPv6 addresses. They are not expected to be routable on the global Internet. They are routable inside of a more limited area such as a site. They may also be routed between a limited set of sites.


    See IANA's [Internet Protocol Version 6 Address Space](http://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml) for an overview of existing allocations.
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