Talk:IPv6 address
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 | Material from IPv6 was split out into IPv6 address on October 2009. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted so long as the latter page exists. Please leave this template in place to link the article histories and preserve this attribution. The former page's talk page can be accessed at Talk:IPv6. |
| Material from Reserved IP addresses was split out into IPv6 address on 12 May 2018. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted so long as the latter page exists. Please leave this template in place to link the article histories and preserve this attribution. The former page's talk page can be accessed at Talk:Reserved IP addresses. |
Is 2002::/16 really deprecated?
The section on reserved addresses says:
2002::/16 — This prefix was used for 6to4 addressing (an address from the IPv4 network 192.88.99.0/24 was also used). The 6to4 addressing scheme is deprecated.
While citing RFC 7526. But the RFC clearly says in section 4:
The basic unicast 6to4 mechanism defined in [RFC3056] and the associated 6to4 IPv6 prefix 2002::/16 are not deprecated. The default address selection rules specified in [RFC6724] are not modified.
AFAIU this RFC only deprecates the anycast version of 6to4 and the associated IPv4 prefix:
This document formally deprecates the anycast 6to4 transition mechanism defined in [RFC3068] and the associated anycast IPv4 address 192.88.99.1. It is no longer considered to be a useful service of last resort.
The prefix 192.88.99.0/24 MUST NOT be reassigned for other use except by a future IETF Standards Action. StayFoolish2021 (talk) 07:46, 20 April 2023 (UTC)
A Commons file used on this page or its Wikidata item has been nominated for speedy deletion
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for speedy deletion:
You can see the reason for deletion at the file description page linked above. —Community Tech bot (talk) 09:55, 21 April 2023 (UTC)
SLAAC Interface identifier composition from MAC address is not accurate
The example about converting 48-bit MAC address into 64-bit interface identifier should be clearer. It appropriately describes addition of FF-FE in the middle, but is missing that the universal/local bit (next to lowest in first byte) should be complemented in the (common) case of Ethernet interface. There is a footnote comment stating this, but in my opinion it could be said more clearly (in a single short sentence) in the actual paragraph. RFC 2464 describes this quite clearly and could be referenced here. Pasisar (talk) 08:45, 4 March 2024 (UTC)
Bad math
https://en.wikipedia.org/w/index.php?title=IPv6_address&oldid=prev&diff=1337299906
3fff::/20 –>
From: 3fff::
To: 3fff:0fff:ffff:ffff:ffff:ffff:ffff:ffff
/20 is not /16
3fff:: =
By hextets:
0011111111111111 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
First 20 bit is:
0011111111111111 0000
Not:
0011111111111111
Your correction is incorrect, not professional. Think again! – kgyt (talk) 00:21, 14 February 2026 (UTC)