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[master] Changes prefix-length-mode default to be "prefer"

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Merges in rt45615.
This commit is contained in:
Thomas Markwalder 2017-12-07 10:29:40 -05:00
parent 60882b8aa5
commit b53ba1572c
3 changed files with 11 additions and 3 deletions
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8
RELNOTES
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@ -256,6 +256,14 @@ dhcp-users@lists.isc.org.
FQDN option unfortunately broke its ability send back dhcp6.vendor-opts. FQDN option unfortunately broke its ability send back dhcp6.vendor-opts.
[ISC-Bugs #46427] [ISC-Bugs #46427]
- The default value for server (-6) parameter, prefix-length-mode, has been
changed from "exact" to "prefer". In "prefer" mode the server will offer
the first available prefix with the same length as that requested by the
client. If none are found then it will offer the first available prefix of
any length. This is more in line with with RFC 8168 and should improve
the out-of-the-box user experience.
[ISC-Bugs #45615]
Changes since 4.3.0 (bug fixes) Changes since 4.3.0 (bug fixes)
- Tidy up several small tickets. - Tidy up several small tickets.

2
server/dhcpd.c
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@ -77,7 +77,7 @@ option server.ddns-rev-domainname = \"in-addr.arpa.\";";
int ddns_update_style; int ddns_update_style;
int dont_use_fsync = 0; /* 0 = default, use fsync, 1 = don't use fsync */ int dont_use_fsync = 0; /* 0 = default, use fsync, 1 = don't use fsync */
int server_id_check = 0; /* 0 = default, don't check server id, 1 = do check */ int server_id_check = 0; /* 0 = default, don't check server id, 1 = do check */
int prefix_length_mode = PLM_EXACT; int prefix_length_mode = PLM_PREFER;
int authoring_byte_order = 0; /* 0 = not set */ int authoring_byte_order = 0; /* 0 = not set */
int lease_id_format = TOKEN_OCTAL; /* octal by default */ int lease_id_format = TOKEN_OCTAL; /* octal by default */

4
server/dhcpd.conf.5
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@ -2922,11 +2922,11 @@ available prefix.
.PP .PP
2. prefer - The server will offer the first available prefix with the same 2. prefer - The server will offer the first available prefix with the same
length as the requested length. If none are found then it will offer the length as the requested length. If none are found then it will offer the
first available prefix of any length. first available prefix of any length. This is the default behavior.
.PP .PP
3. exact - The server will offer the first available prefix with the same 3. exact - The server will offer the first available prefix with the same
length as the requested length. If none are found, it will return a status length as the requested length. If none are found, it will return a status
indicating no prefixes available. This is the default behavior. indicating no prefixes available.
.PP .PP
4. minimum - The server will offer the first available prefix with the same 4. minimum - The server will offer the first available prefix with the same
length as the requested length. If none are found, it will return the first length as the requested length. If none are found, it will return the first