diff options
| -rw-r--r-- | RELNOTES | 175 |
1 files changed, 92 insertions, 83 deletions
@@ -65,6 +65,13 @@ Dynamic shared library support: with the source tar ball. This script can be used to configure ISC DHCP to build with libtool and thus use dynamic shared libraries. +Other Highlights: + + - The server now supports dhcp-cache-threshold for DHCPv6 operations + - The server now supports DHPv6 address allocation based on EUI-64 DUIDs + - Experimental support for alternate relay port in the both the server + and relay for IPv4, IPv6 and 4o6 (see: draft-ietf-dhc-relay-port-10.txt) + For information on how to install, configure and run this software, as well as how to find documentation and report bugs, please consult the README file. @@ -80,9 +87,92 @@ ISC DHCP is open source software maintained by Internet Systems Consortium. This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). - Changes since 4.4.0a1 + Changes since 4.4.0a1 (New Features) -- None +- Added experimental support for relay port (draft-ietf-dhc-relay-port-10.txt) + feature for DHCPv4, DHCPv6 and DHCPv4-over-DHCPv6. Relay port has to be + enabled at compile time via --enable-relay-port and is fully backward + compatible (i.e. works with previous implementations of servers and relays + using the standard ports). A new --rp <relay-port> command line option + specifies to dhcrelay an alternate source port for upstream (i.e. toward + the server) messages. Thanks to Naiming Shen and Enke Chen of Cisco + systems for submitting these patches. + [ISC-Bugs #44535] + +- Added --release-on-roam to dhcpd server. When enabled and the server detects + that a DHCPv6 client (IAID+DUID) has roamed to a new network, it will release + the pre-existing leases on the old network and emit a log statement similar + to the following: + + "Client: <id> roamed to new network, releasing lease: <address>" + + The server will carry out all of the same steps that would normally occur + when a client explicitly releases a lease. This behavior is disabled by + default and may only be specified globally. Prior to this the server renders + the leases unavailable until they expire or the server is restarted. Clients + that need leases in multiple networks must supply a unique IAID in each IA. + When release-on-roam is disabled (the default) the server maintains the + prior behavior of making such leases unavailable until they expire or the + server is restarted. Clients that need leases in multiple networks must + supply a unique IAID in each IA. This parameter may only be specified at + the global level. Thanks to Fernando Soto from BlueCat Networks for + suggesting this change. + [ISC-Bugs #44576] + [ISC-Bugs #46849] + +- Support for delayed-ack is now compiled in by default. Prior to this + it had to be enabled at compile time via --enable-delayed-acks. The + default value for delayed-ack, however, has been changed from 28 to 0 + (i.e. disabled). This was done to minimize the impact on users not + currently using the feature. Please note that the delayed-ack feature + is not currently compatible with support for DHPCv4-over-DHCPv6 so + when a 4to6 port command line argument enables this in the server the + delayed-ack value is reset to 0. + [ISC-Bugs #42446] + +- The server (-6) now honors the parameter, update-static-leases, for static + (fixed-address6) DHCPv6 leases. It is worth noting that because stateful + data is not retained by the server for static leases, each time a client + requests or renews a static lease, the server will perform DDNS updates for + it. This may have significant performance implications for environments + with many clients that request or renew static leases often. Similarly, + the DNS entries will not be removed by server when a client issues a RELEASE + nor if the lease is deleted from the configuration. In such cases the DNS + entries must be removed manually. This feature is disabled by default. + Thanks to both Bill Shirley and dgutier-at-cern-dot-ch for requesting + this change. + [ISC-Bugs #34097] + [ISC-Bugs #41054] + [ISC-Bugs #41450] + +- Added to the server (-6) a new statement, local-address6, which specifies + the source address of packets sent by the server. An additional flag, + bind-local-address6, disabled by default, binds the service socket to + to local-address6. Note that bind-local-address does not work with direct + clients: a relay has to forward packets to the server using the + local-address6 destination. + [ISC-Bugs #46084] + + Changes since 4.4.0a1 (Bugs) + +- The server now recognizes environment variables PATH_DHCPD_DB and + PATH_DHCPD_PID. These had been incorrectly compiled out of the code + unless DHCPv6 support was disabled. Additionally, the server man + pages were corrected to accurately reflect how the server chooses + file names (see lease-file-name and pid-file-name statements). Thanks + to Fernando Soto at Bluecat for bringing this matter to our attention. + [ISC-Bugs #46859] + +- Removed an "Impossible condition" error upon exit in the dhcpd server that + has been shutdown via OMAPI. This condition was only apparent under Solaris + when building with --enable-use-sockets and --enable-ipv4-pktinfo. + [ISC-Bugs #36118] + +- Corrected some minor coverity issues: CID 1426059, 1426058, and 1426057. + [ISC-Bugs #46836] + +- Added missing text to dhclient.8 and expanded release note coverage + for --address-prefix-len changes. Changes since 4.3.6 (New Features) @@ -177,27 +267,6 @@ by Eric Young (eay@cryptsoft.com). doing load balancing within failover. [ISC-Bugs #45364] -- Added --release-on-roam to dhcpd server. When enabled and the server detects - that a DHCPv6 client (IAID+DUID) has roamed to a new network, it will release - the pre-existing leases on the old network and emit a log statement similar - to the following: - - "Client: <id> roamed to new network, releasing lease: <address>" - - The server will carry out all of the same steps that would normally occur - when a client explicitly releases a lease. This behavior is disabled by - default and may only be specified globally. Prior to this the server renders - the leases unavailable until they expire or the server is restarted. Clients - that need leases in multiple networks must supply a unique IAID in each IA. - When release-on-roam is disabled (the default) the server maintains the - prior behavior of making such leases unavailable until they expire or the - server is restarted. Clients that need leases in multiple networks must - supply a unique IAID in each IA. This parameter may only be specified at - the global level. Thanks to Fernando Soto from BlueCat Networks for - suggesting this change. - [ISC-Bugs #44576] - [ISC-Bugs #46849] - - 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 @@ -261,50 +330,6 @@ by Eric Young (eay@cryptsoft.com). only expired address associations. Thanks to Jiri Popelka at Red Hat for raising the issue and submitting the patch. [ISC-Bugs #22675] - -- Support for delayed-ack is now compiled in by default. Prior to this - it had to be enabled at compile time via --enable-delayed-acks. The - default value for delayed-ack, however, has been changed from 28 to 0 - (i.e. disabled). This was done to minimize the impact on users not - currently using the feature. Please note that the delayed-ack feature - is not currently compatible with support for DHPCv4-over-DHCPv6 so - when a 4to6 port command line argument enables this in the server the - delayed-ack value is reset to 0. - [ISC-Bugs #42446] - -- The server (-6) now honors the parameter, update-static-leases, for static - (fixed-address6) DHCPv6 leases. It is worth noting that because stateful - data is not retained by the server for static leases, each time a client - requests or renews a static lease, the server will perform DDNS updates for - it. This may have significant performance implications for environments - with many clients that request or renew static leases often. Similarly, - the DNS entries will not be removed by server when a client issues a RELEASE - nor if the lease is deleted from the configuration. In such cases the DNS - entries must be removed manually. This feature is disabled by default. - Thanks to both Bill Shirley and dgutier-at-cern-dot-ch for requesting - this change. - [ISC-Bugs #34097] - [ISC-Bugs #41054] - [ISC-Bugs #41450] - -- Added to the server (-6) a new statement, local-address6, which specifies - the source address of packets sent by the server. An additional flag, - bind-local-address6, disabled by default, binds the service socket to - to local-address6. Note that bind-local-address does not work with direct - clients: a relay has to forward packets to the server using the - local-address6 destination. - [ISC-Bugs #46084] - -- Added experimental support for relay port (draft-ietf-dhc-relay-port-10.txt) - feature for DHCPv4, DHCPv6 and DHCPv4-over-DHCPv6. Relay port has to be - enabled at compile time via --enable-relay-port and is fully backward - compatible (i.e. works with previous implementations of servers and relays - using the standard ports). A new --rp <relay-port> command line option - specifies to dhcrelay an alternate source port for upstream (i.e. toward - the server) messages. Thanks to Naiming Shen and Enke Chen of Cisco - systems for submitting these patches. - [ISC-Bugs #44535] - Changes since 4.3.6 (Bugs): - Corrected an issue where the server would return a client's previously @@ -350,22 +375,6 @@ by Eric Young (eay@cryptsoft.com). bringing this issue to our attention. [ISC-Bugs #46427] -- The server now recognizes environment variables PATH_DHCPD_DB and - PATH_DHCPD_PID. These had been incorrectly compiled out of the code - unless DHCPv6 support was disabled. Additionally, the server man - pages were corrected to accurately reflect how the server chooses - file names (see lease-file-name and pid-file-name statements). Thanks - to Fernando Soto at Bluecat for bringing this matter to our attention. - [ISC-Bugs #46859] - -- Removed an "Impossible condition" error upon exit in the dhcpd server that - has been shutdown via OMAPI. This condition was only apparent under Solaris - when building with --enable-use-sockets and --enable-ipv4-pktinfo. - [ISC-Bugs #36118] - -- Corrected some minor coverity issues: CID 1426059, 1426058, and 1426057. - [ISC-Bugs #46836] - Changes since 4.3.6b1 - None |