Commit a804fcc0 authored by Thomas Markwalder's avatar Thomas Markwalder

[master] Added backward incompatibility warnings to RELNOTES

   Merges in rt23252a.
parent d8805cee
......@@ -35,14 +35,27 @@ Dynamic DNS Improvements:
dhclient Improvements:
- We've added two new command line parameters to dhclient:
- We've added three command line parameters to dhclient:
1. --prefix-len-hint - directs dhclient to use the given length as
the prefix length hint when requesting prefixes
2. --declient-wait-time - instructs the client to wait the given number
2. --decline-wait-time - instructs the client to wait the given number
of seconds after declining an IPv4 address before issuing a discover
3. --address-prefix-len - specifies the prefix length passed by dhclient
into the client script (via the environment variable ip6_prefixlen) with
each IPv6 address. We added this parameter because we have changed the
default value from 64 to 128 in order to be compliant with RFC3315bis
draft (-09, page 64) and RFC5942, Section 4, point 1.
**WARNING**: The new default value of 128 may not be backwardly compatible
with your environment. If you are operating without a router, such as
between VMs on a host, you may find they cannot see each with prefix
length of 128. In such cases, you'll need to either provide routing or use
the command line parameter to set the value to 64. Alternatively you may
change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN
in includes/site.h.
- dhclient will now generate a DHCPv6 DECLINE message when the client script
indicates a DAD failure
......@@ -231,18 +244,21 @@ by Eric Young (eay@cryptsoft.com).
[ISC-Bugs #45046]
- Changed the default value of the prefix length passed by dhclient into the
client script for each IPv6 address, from 64 to 128. In addition, dhclient
now supports a command line argument, --address-prefix-len <len>, which may
be used to override the default value. PLEASE NOTE: If your DHCPv6 clients
require a value other than 128, you MUST specify the value via this new
command line argument. Prior to this the only way to alter the value was at
compile time by changing DHCLIENT_DEFAULT_PREFIX_LEN in include/sites.h.
**NOTE: THIS IS CHANGE IN DEFAULT BEHAVIOR.
client script for each IPv6 address from 64 to 128. This was done to comply
with RFC3315bis draft (-09, page 64) and RFC5942, Section 4, point 1.
In addition, dhclient now supports a command line argument,
--address-prefix-len, which may be used to override the default value.
**WARNING**: This change may not be backwardly compatible with your
environment. If you are operating without a router, such as between VMs on
a host, you may find they cannot see each with prefix length of 128. In
such cases, you'll need to either provide routing or use the command line
parameter to set the value to 64. Alternatively you may change the default
at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN in includes/site.h.
[ISC-Bugs #23252]
[ISC-Bugs #37221]
- Modified dhclient (-6) to bypass sending a confirm (INIT REBOOT) when it has
only expired address assocations. Thanks to Jiri Popelka at Red Hat for
only expired address associations. Thanks to Jiri Popelka at Red Hat for
raising the issue and submitting the patch.
[ISC-Bugs #22675]
......@@ -300,7 +316,7 @@ by Eric Young (eay@cryptsoft.com).
for pointing out the error of our ways.
[ISC-bugs #45780]
- Added explicit include of BIND9 isc/util.h to adapt to revisisions
- Added explicit include of BIND9 isc/util.h to adapt to revisions
in BIND9 (see BIND9 ticket #46311). Prior to this the build was failing
with implicit function declarations errors for POST() and INSIST().
[ISC-bugs #46332]
......@@ -317,7 +333,7 @@ by Eric Young (eay@cryptsoft.com).
- Replaced iasubopt::heap_index with separate values for active and inactive
heaps: iasubopt::active_index and iasubopt::inactive_index. This was done
to accomodate a change in behavior in BIND9 isc_heap_delete().
to accommodate a change in behavior in BIND9 isc_heap_delete().
[ISC-bugs #46719]
! Plugged a socket descriptor leak in OMAPI, that can occur when there is
......
.\" $Id: dhclient.8,v 1.36 2011/04/15 21:58:12 sar Exp $
.\"
.\" Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
.\" Copyright (c) 2004-2018 by Internet Systems Consortium, Inc. ("ISC")
.\" Copyright (c) 1996-2003 by Internet Software Consortium
.\"
.\" This Source Code Form is subject to the terms of the Mozilla Public
......@@ -363,7 +363,7 @@ Use a DUID with DHCPv4 clients. If no DUID is available in the
lease file one will be constructed and saved. The DUID will be
used to construct a RFC4361 style client id that will be included
in the client's messages. This client id can be overridden by
setting a client id in the configuration file. Overridding the
setting a client id in the configuration file. Overriding the
client id in this fashion is discouraged.
.TP
.BI \-I
......@@ -429,6 +429,14 @@ Restore normal address query for IPv6. This implies \fB-6\fR.
It is used to restore normal operation after using \fB-T\fR or \fB-P\fR.
Multiple addresses can be requested with multiple \fB\-N\fR flags.
.TP
.BI \--address-prefix-len \ length
Specify the length of the prefix for IPv6 addresses. This value is passed by
dhclient into the client script via the environment variable, ip6_prefixlen,
when binding IPv6 addresses. The default value is 128. Alternatively you may
change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN in
includes/site.h.
.PP
.TP
.BI \--dad-wait-time \ seconds
Specify maximum time (in seconds) that the client should wait for the
duplicate address detection (DAD) to complete on an interface. This
......
......@@ -165,13 +165,13 @@ static const char use_v6command[] = "Command not used for DHCPv4: %s";
"[-4|-6] [-SNTPRI1dvrxi] [-nw] -4o6 <port>] [-p <port>] [-D LL|LLT]\n" \
" [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \
" [--decline-wait-time <seconds>]\n" \
" [--address-prefix-len length]\n"
" [--address-prefix-len <length>]\n"
#else /* DHCP4o6 */
#define DHCLIENT_USAGE0 \
"[-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]\n" \
" [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \
" [--decline-wait-time <seconds>]\n" \
" [--address-prefix-len length]\n"
" [--address-prefix-len <length>]\n"
#endif
#else /* DHCPv6 */
#define DHCLIENT_USAGE0 \
......
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