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Status: Verified (2)

RFC 6724, "Default Address Selection for Internet Protocol Version 6 (IPv6)", September 2012

Source of RFC: 6man (int)

Errata ID: 3343
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Stephane Bortzmeyer
Date Reported: 2012-09-12
Verifier Name: Brian Haberman
Date Verified: 2012-09-12

Section 10.1 says:

Destination: 2001:db8:1::1
Candidate Source Addresses: 2001:db8:3::1 or fe80::1
Result: 2001:db8::1 (prefer appropriate scope)

It should say:

Destination: 2001:db8:1::1
Candidate Source Addresses: 2001:db8:3::1 or fe80::1
Result: 2001:db8:3::1 (prefer appropriate scope)

Notes:

2001:db8::1 is not even in the candidate set.

Errata ID: 3344
Status: Verified
Type: Editorial
Publication Format(s) : TEXT

Reported By: Stephane Bortzmeyer
Date Reported: 2012-09-12
Verifier Name: Brian Haberman
Date Verified: 2012-09-12

Section 10.1 says:

   Destination: 2001:db8:1::1
   Candidate Source Addresses: 2001:db8:1::2 or 2001:db8:3::2
   Result: 2001:db8:1:::2 (longest matching prefix)

It should say:

   Destination: 2001:db8:1::1
   Candidate Source Addresses: 2001:db8:1::2 or 2001:db8:3::2
   Result: 2001:db8:1::2 (longest matching prefix)

Notes:

Invalid IPv6 syntax

Status: Reported (1)

RFC 6724, "Default Address Selection for Internet Protocol Version 6 (IPv6)", September 2012

Source of RFC: 6man (int)

Errata ID: 6971
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Brian Carpenter
Date Reported: 2022-05-10

Section 2.2 says:

We define the common prefix length CommonPrefixLen(S, D) of a source
address S and a destination address D as the length of the longest
prefix (looking at the most significant, or leftmost, bits) that the
two addresses have in common, up to the length of S's prefix (i.e.,
the portion of the address not including the interface ID).  For
example, CommonPrefixLen(fe80::1, fe80::2) is 64.

It should say:

We define the common prefix length CommonPrefixLen(S, D) of a source
address S and a destination address D as the length of the longest
prefix (looking at the most significant, or leftmost, bits) that the
two addresses have in common, up to the length of S's prefix (i.e.,
for most IPv6 addresses,
the portion of the address not including the interface ID).  For
example, CommonPrefixLen(fe80::1, fe80::2) is 64. For two IPv4-mapped
addresses in ::ffff:0:0/96, CommonPrefixLen() may be up to 128.

Notes:

1) Not all IPv6 address formats have a well-defined interface index.
2) In particular, the original text is inapplicable to IPv4-mapped addresses.
3) N.B.: In practice it seems that some implementations simply do a longest match up to /128 and that works fine.

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