# Release Notes {#release_notes} * @subpage release_notes_2001 * @subpage release_notes_1908 * @subpage release_notes_19042 * @subpage release_notes_19041 * @subpage release_notes_1904 * @subpage release_notes_19013 * @subpage release_notes_19012 * @subpage release_notes_19011 * @subpage release_notes_1901 * @subpage release_notes_1810 * @subpage release_notes_1807 * @subpage release_notes_1804 * @subpage release_notes_18012 * @subpage release_notes_18011 * @subpage release_notes_1801 * @subpage release_notes_1710 * @subpage release_notes_1707 * @subpage release_notes_1704 * @subpage release_notes_17011 * @subpage release_notes_1701 * @subpage release_notes_1609 * @subpage release_notes_1606 @page release_notes_2001 Release notes for VPP 20.01 TBD @page release_notes_1908 Release notes for VPP 19.08 More than 850 commits since the 19.04 release. ## Features ### Infrastructure - API - API language: new types and limits support - Python API - add support for defaults - Export ip_types.api for out-of-tree plugins use - Refactor ipip.api with explicit types - DPDK - 19.05 integration - Remove bonding code - Rework extended stats - Debugging & Servicability - debug CLI leak-checker - vlib: add "memory-trace stats-segment" - vppapitrace JSON/API trace converter - ARP: add arp-disabled node - igmp: Trace more data from input packets - ip: Trace the packet from the punt node - Python API debug introspection improvements - Pin dependencies for make test infra - FEATURE.yaml meta-data infrastructure - tcp: add cc stats plotting tools - Packet tracer support for thread handoffs - libmemif: support for multi-thread connection establishment - svm - fifo ooo reads/writes with multiple chunks - support addition/removal of chunks to fifos - vppinfra - Mapped pcap file support - More AVX2 and AVX512 inlines - VLIB_INIT_FUNCTION sequencing rework - refactor spinlocks and rwlocks - add rbtree - add doubly linked list - rdma: bump rdma-core to v25.0 - stats - Add the number of worker threads and per worker thread vector rates - Support multiple workers for error counters ### VNET & Plugins - New Plugins - HTTP static page server with TLS support - L3 cross connect - acl: implement stat-segment counters - arp: add feature arcs: arp-reply, arp-input, arp-proxy - avf: improved logging and added 2.5/5 Gbps speeds - bonding: NUMA-related improvements - crypto: add support for AES-CTR cipher - fib - FIB Entry tracking - Support the POP of a Pseudo Wire Control Word - gbp - Anonymous l3-out subnets support - ARP unicast forward in gbp bridge domain - An Endpoint can change sclass - Consider data-plane learnt source better than control-plane - VRF scoped contracts - gso (experimental) - Add support to pg interfaces - Add support to vhost user - Add support to native virtio - Add support for tagged interfaces - punt: allow to specify packets by IP protocol Type - ip6-local: hop-by-hop protocol demux table - ipsec - intel-ipsec-mb version 0.52 - AH encrypt rework - handle UDP keepalives - support GCM in ESP - virtio - Refactor control queue support - dhcp-client: DSCP marking for transmitted packets - Idle resource usage improvements - Allocate bihash virtual space on demand - gre: don't register gre input nodes unless a gre tunnel is created - gtpu: don't register udp ports unless a tunnel is created - lacp: create lacp-process on demand - lisp-cp: start lisp retry service on demand - start the cdp period and dns resolver process on demand - vat: unload unused vat plugins - nat: api cleanup & update - nsim: make available as an output feature - load-balance performance improvements - l2: Add support for arp unicast forwarding - mactime - Mini-ACLs - Per-MAC allow-with-quota feature - qos - QoS dump APIs - Store function - rdma: add support for promiscuous mode (l2-switching and xconnect) - sr: update the Segment Routing definition to be compliant with current in IETF - udp-ping: disable due to conflict with mldv2 - vxlan-gpe: improve encap performance - vom - QoS support - Bridge domain arp unicast forwarding flag - Bridge domain unknown unicast flooding flag ### Host stack - session - API to support manual svm fifo resizing - Improved session output scheduler and close state machine - Transport and session cleanup notifications for builtin apps - Session migration notifications for builtin apps - Support for no session layer lookup transports (quic and tls) - Ability to retrieve local/remote endpoint in transport vft - Cleanup segment manager and fifo segment - Fix vpp to app msg generation on enqueue fail - Improve event logging - Moved test applications to hsa plugin - tcp - Congestion control algorithm enhancements - Delivery rate estimator - ACK/retransmission refactor and pacing - Add tcp-input sibling nodes without full 6-tuple lookup - More RFC4898 connection statistics - Allow custom output next node - Allow custom congestion control algorithms - quic - Multi-thread support - Logs readability improvements - Multistream support - tls - Fix close with data and listen failures - Handle TCP transport rests - Support endpoint retrieval interface - vcl - support quic streams and "connectable listeners" - worker unregister api - fix epoll with large events batch - ldp: add option to eanble transparent TLS connections - udp: - support close with data - fixed session migration - sctp - add option to enable/disable default to disable - moved from vnet to plugins ## Known issues For the full list of issues please refer to fd.io [JIRA](https://jira.fd.io). ## Issues fixed For the full list of fixed issues please refer to: - fd.io [JIRA](https://jira.fd.io) - git [commit log](https://git.fd.io/vpp/log/?h=stable/1908) ## API changes Description of results: * _Definition changed_: indicates that the API file was modified between releases. * _Only in image_: indicates the API is new for this release. * _Only in file_: indicates the API has been removed in this release. Message Name | Result -------------------------------------------------------------|------------------ abf_itf_attach_add_del | definition changed abf_itf_attach_details | definition changed abf_policy_add_del | definition changed abf_policy_details | definition changed acl_add_replace | definition changed acl_details | definition changed acl_stats_intf_counters_enable | only in image acl_stats_intf_counters_enable_reply | only in image api_versions_reply | definition changed bd_ip_mac_add_del | definition changed bd_ip_mac_details | definition changed bier_disp_entry_add_del | definition changed bier_disp_entry_details | definition changed bier_imp_add | definition changed bier_imp_details | definition changed bier_route_add_del | definition changed bier_route_details | definition changed bier_route_dump | definition changed bier_table_add_del | definition changed bier_table_details | definition changed bond_create | definition changed bridge_domain_add_del | definition changed bridge_domain_details | definition changed bridge_flags | definition changed connect_sock | definition changed create_vhost_user_if | definition changed ct6_enable | only in file ct6_enable_disable | only in image ct6_enable_disable_reply | only in image ct6_enable_disable | only in file dhcp6_pd_reply_event | definition changed dhcp6_pd_send_client_message | definition changed dhcp6_reply_event | definition changed dhcp6_send_client_message | definition changed dhcp_client_config | definition changed dhcp_client_details | definition changed dhcp_compl_event | definition changed dhcp_proxy_details | definition changed dslite_add_del_pool_addr_range | definition changed dslite_address_details | definition changed dslite_get_aftr_addr_reply | definition changed dslite_get_b4_addr_reply | definition changed dslite_set_aftr_addr | definition changed dslite_set_b4_addr | definition changed gbp_bridge_domain_add | definition changed gbp_bridge_domain_details | definition changed gbp_contract_add_del | definition changed gbp_contract_details | definition changed gbp_endpoint_add | definition changed gbp_endpoint_details | definition changed gbp_endpoint_group_add | definition changed gbp_endpoint_group_details | definition changed gbp_ext_itf_add_del | definition changed gbp_ext_itf_details | definition changed gbp_recirc_add_del | definition changed gbp_recirc_details | definition chang
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