Programmable Overlays with VPP
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1 Programmable Overlays with LinuxCon 2016, Toronto Florin Coras, Vina Ermagan Cisco Systems
2 Overlay Network Engine Objective Enable programmable, software defined, overlays Data driven control-plane protocol Rich set of forwarding policies Various overlay address families and encapsulation technologies SDN controller driven
3 Overlay Features Overlay Control Plane Mapping System overlay underlay overlay
4 Overlay Features Retrieve destination mapping Mapping System
5 Overlay Features b->b Mapping System B b Encapsulate and forward packets over underlay
6 Overlay Features b->{b1, B2} Mapping System B1 B2 b Use multiple paths if possible
7 Overlay Features Mapping System B1 B2 Decap and forward to destination
8 Overlay Features SDN Controller Mapping System External trigger Reprogram forwarding
9 Overlay Features SDN Controller Mapping System b->[c, B] C B b
10 Overlay Features SDN Controller Mapping System External trigger Reprogram forwarding x C B b
11 Overlay Features SDN Controller Mapping System b->[c, B] [x, b]->b C x only if sourced by x B b
12 APIs Controller NETCONF (Honeycomb) CLI Binary API CP Protocol APIs
13 APIs Controller configuration NETCONF (Honeycomb) CLI Binary API CP Protocol APIs
14 APIs Controller NETCONF (Honeycomb) dynamic updating of forwarding CLI Binary API CP Protocol APIs
15 Tunneling protocols in GRE MPLS-GRE L2TP VXLAN VXLAN-GPE ILA IPSEC-GRE (code just in)
16 Overlay Network Engine (ONE) Project definition SDN controller: OpenDaylight control plane: LISP data plane: starting with Generic Protocol Encapsulation (LISP-GPE) ODL LispFlowMapping NETCONF LISP LISP NETCONF GPE Other GPE Other
17 Overlay Network Engine (ONE) Features Any of IP4, IP6 and L2 overlays on top of IP4 and/or IP6 underlays Multihoming/load balancing between underlay attachment points Multitenancy/EID virtualization Overlays spanning disjoint underlays with re-encapsulating routers CLI, binary API and VAT (test API) Soon: NETCONF support (Honeycomb) and src/dst control plane support
18 Overlay Network Engine (ONE) Programmability External trigger ODL LispFlowMapping ODL tracks mappings subscribers and pushes notifications when changes occur.
19 Create overlay: use-case multihoming Router config lisp enable lisp locator-set add ls1 iface <ifname1> p 1 w 1 iface <ifname2> p 1 w 1 lisp eid-table add eid <ip-prefix> locator-set ls1 lisp map-resolver add <mr-ip> b->{b1, B2} Mapping System ODL config Use RESTCONF to add two mappings, one per router B1 B2 b
20 node graph (simplified) dpdk-input eth-input ipx-rewrite iface_output iface_tx ipx-input ipx-local ipx-udp-lookup
21 ONE node graph init - dp dpdk-input eth-input lgpe- lisp-gpe-tx recirculate via iface ipx-input lispx 4341 lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
22 ONE node graph init - dp Attach dpdk-input lgpe- as possible next_hop to when lisp-gpe interface is switched on. eth-input lgpe- src matching lisp-gpe-tx recirculate via iface ipx-input dst matching lispx 4341 lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
23 ONE node graph init - dp dpdk-input eth-input Add one lispx interface per table_id (vrf) and have the tx function do the lisp encap lgpe- lisp-gpe-tx recirculate via iface ipx-input lispx output features 4341 lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
24 ONE node graph init - dp dpdk-input eth-input If all goes right in lookup, send to lisp-gpeoutput_node (output features like IPsec can be executed here) and subsequently to lispgpe-tx_node where packets are lisp-gpe encapsulated lgpe- lisp-gpe-tx recirculate via iface ipx-input lispx output features lisp-gpe-ipx-input 4341 ipx-local ipx-udp-lookup data-plane
25 ONE node graph init - dp dpdk-input eth-input iface lgpe- lisp-gpe-tx recirculate via ipx-input lispx Register lisp-gpe-ipx-input as handler of UDP port 4341 packets 4341 lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
26 ONE node graph init - cp dpdk-input lisp-cp-lookup eth-input iface lgpe- lisp-gpe-tx recirculate via ipx-input lispx lisp-gpe-ipx-input 4341 data-plane control-plane ipx-local ipx-udp-lookup 4342 lisp-cp-input
27 ONE node graph init - cp dpdk-input Add default route that points to lisp-cp-lookup. lisp-cp-lookup eth-input iface lgpe- lisp-gpe-tx recirculate via ipx-input lispx lisp-gpe-ipx-input 4341 data-plane control-plane ipx-local ipx-udp-lookup 4342 lisp-cp-input
28 ONE node graph init - cp dpdk-input lisp-cp-lookup eth-input iface lgpe- lisp-gpe-tx recirculate via ipx-input lispx lisp-gpe-ipx-input Register lisp-cp-input 4341 as handler of UDP port 4342 packets data-plane control-plane ipx-local ipx-udp-lookup 4342 lisp-cp-input
29 ONE node graph init features dpdk-input lisp-cp-lookup eth-input iface lgpe- lisp-gpe-tx recirculate via ipx-input lispx classify encrypt ipsec-input ipsec-output 4341 lisp-gpe-ipx-input data-plane control-plane ipx-local ipx-udp-lookup 4342 lisp-cp-input iface-feature
30 ONE node graph init L2 dp dpdk-input eth-input l2-lispx lisp-gpe-tx recirculate via iface ipx-input l2-input lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
31 ONE node graph init L2 dp dpdk-input eth-input Add one l2_lispx interface per bridge domain and have the tx function do the lisp encap l2-lispx lisp-gpe-tx recirculate via iface ipx-input l2-input lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane
32 ONE node graph init L2 cp dpdk-input eth-input Flood packets with unknown destinations are sent to lisp-cp-lookup lisp-cp-lookup iface l2-lispx lisp-gpe-tx recirculate via ipx-input l2-input lisp-gpe-ipx-input ipx-local ipx-udp-lookup data-plane lisp-cp-input
33 ONE control plane gid-dictionary lisp_fwd_cache CRD mappings CRD fwd entries lisp-gpe router logic lisp-cp-input lisp-cp-lookup lisp-dp-api egress map-request ingress map-request map-reply vpp fwd entry request lisp-gpe data plane add/del fwd entry
34 Demo Map-Cache Mapping System b->b B b IP6 over IP4 overlay
35 Demo Map-Cache Mapping System b->b IPv4 RTR Buy faster/cheaper transit or transition part of the core to IPv6 IPv6
36 Demo Switch to RTR path Map-Cache b->rtr Mapping System Reprogram forwarding IPv4 RTR IPv6
37 Demo Switch to RTR path Map-Cache Mapping System b->rtr IPv4 RTR IPv6
38 Next steps Get involved Get the Code, Build the Code, Run the Code Read/Watch the Tutorials Read/Watch Tutorials Join the Mailing Lists
39 Thank you!?
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