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[master] Added backward incompatibility warnings to RELNOTES
Merges in rt23252a.
This commit is contained in:
Thomas Markwalder
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d8805cee56
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a804fcc04a
40
RELNOTES
40
RELNOTES
@ -35,14 +35,27 @@ Dynamic DNS Improvements:
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dhclient Improvements:
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- We've added two new command line parameters to dhclient:
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- We've added three command line parameters to dhclient:
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1. --prefix-len-hint - directs dhclient to use the given length as
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the prefix length hint when requesting prefixes
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2. --declient-wait-time - instructs the client to wait the given number
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2. --decline-wait-time - instructs the client to wait the given number
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of seconds after declining an IPv4 address before issuing a discover
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3. --address-prefix-len - specifies the prefix length passed by dhclient
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into the client script (via the environment variable ip6_prefixlen) with
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each IPv6 address. We added this parameter because we have changed the
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default value from 64 to 128 in order to be compliant with RFC3315bis
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draft (-09, page 64) and RFC5942, Section 4, point 1.
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**WARNING**: The new default value of 128 may not be backwardly compatible
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with your environment. If you are operating without a router, such as
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between VMs on a host, you may find they cannot see each with prefix
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length of 128. In such cases, you'll need to either provide routing or use
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the command line parameter to set the value to 64. Alternatively you may
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change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN
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in includes/site.h.
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- dhclient will now generate a DHCPv6 DECLINE message when the client script
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indicates a DAD failure
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@ -231,18 +244,21 @@ by Eric Young (eay@cryptsoft.com).
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[ISC-Bugs #45046]
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- Changed the default value of the prefix length passed by dhclient into the
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client script for each IPv6 address, from 64 to 128. In addition, dhclient
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now supports a command line argument, --address-prefix-len <len>, which may
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be used to override the default value. PLEASE NOTE: If your DHCPv6 clients
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require a value other than 128, you MUST specify the value via this new
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command line argument. Prior to this the only way to alter the value was at
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compile time by changing DHCLIENT_DEFAULT_PREFIX_LEN in include/sites.h.
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**NOTE: THIS IS CHANGE IN DEFAULT BEHAVIOR.
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client script for each IPv6 address from 64 to 128. This was done to comply
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with RFC3315bis draft (-09, page 64) and RFC5942, Section 4, point 1.
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In addition, dhclient now supports a command line argument,
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--address-prefix-len, which may be used to override the default value.
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**WARNING**: This change may not be backwardly compatible with your
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environment. If you are operating without a router, such as between VMs on
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a host, you may find they cannot see each with prefix length of 128. In
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such cases, you'll need to either provide routing or use the command line
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parameter to set the value to 64. Alternatively you may change the default
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at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN in includes/site.h.
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[ISC-Bugs #23252]
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[ISC-Bugs #37221]
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- Modified dhclient (-6) to bypass sending a confirm (INIT REBOOT) when it has
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only expired address assocations. Thanks to Jiri Popelka at Red Hat for
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only expired address associations. Thanks to Jiri Popelka at Red Hat for
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raising the issue and submitting the patch.
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[ISC-Bugs #22675]
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@ -300,7 +316,7 @@ by Eric Young (eay@cryptsoft.com).
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for pointing out the error of our ways.
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[ISC-bugs #45780]
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- Added explicit include of BIND9 isc/util.h to adapt to revisisions
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- Added explicit include of BIND9 isc/util.h to adapt to revisions
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in BIND9 (see BIND9 ticket #46311). Prior to this the build was failing
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with implicit function declarations errors for POST() and INSIST().
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[ISC-bugs #46332]
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@ -317,7 +333,7 @@ by Eric Young (eay@cryptsoft.com).
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- Replaced iasubopt::heap_index with separate values for active and inactive
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heaps: iasubopt::active_index and iasubopt::inactive_index. This was done
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to accomodate a change in behavior in BIND9 isc_heap_delete().
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to accommodate a change in behavior in BIND9 isc_heap_delete().
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[ISC-bugs #46719]
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! Plugged a socket descriptor leak in OMAPI, that can occur when there is
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@ -1,6 +1,6 @@
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.\" $Id: dhclient.8,v 1.36 2011/04/15 21:58:12 sar Exp $
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.\"
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.\" Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
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.\" Copyright (c) 2004-2018 by Internet Systems Consortium, Inc. ("ISC")
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.\" Copyright (c) 1996-2003 by Internet Software Consortium
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.\"
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.\" This Source Code Form is subject to the terms of the Mozilla Public
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@ -363,7 +363,7 @@ Use a DUID with DHCPv4 clients. If no DUID is available in the
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lease file one will be constructed and saved. The DUID will be
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used to construct a RFC4361 style client id that will be included
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in the client's messages. This client id can be overridden by
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setting a client id in the configuration file. Overridding the
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setting a client id in the configuration file. Overriding the
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client id in this fashion is discouraged.
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.TP
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.BI \-I
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@ -429,6 +429,14 @@ Restore normal address query for IPv6. This implies \fB-6\fR.
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It is used to restore normal operation after using \fB-T\fR or \fB-P\fR.
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Multiple addresses can be requested with multiple \fB\-N\fR flags.
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.TP
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.BI \--address-prefix-len \ length
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Specify the length of the prefix for IPv6 addresses. This value is passed by
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dhclient into the client script via the environment variable, ip6_prefixlen,
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when binding IPv6 addresses. The default value is 128. Alternatively you may
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change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN in
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includes/site.h.
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.PP
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.TP
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.BI \--dad-wait-time \ seconds
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Specify maximum time (in seconds) that the client should wait for the
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duplicate address detection (DAD) to complete on an interface. This
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@ -165,13 +165,13 @@ static const char use_v6command[] = "Command not used for DHCPv4: %s";
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"[-4|-6] [-SNTPRI1dvrxi] [-nw] -4o6 <port>] [-p <port>] [-D LL|LLT]\n" \
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" [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \
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" [--decline-wait-time <seconds>]\n" \
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" [--address-prefix-len length]\n"
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" [--address-prefix-len <length>]\n"
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#else /* DHCP4o6 */
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#define DHCLIENT_USAGE0 \
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"[-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]\n" \
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" [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \
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" [--decline-wait-time <seconds>]\n" \
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" [--address-prefix-len length]\n"
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" [--address-prefix-len <length>]\n"
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#endif
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#else /* DHCPv6 */
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#define DHCLIENT_USAGE0 \
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