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diff --git a/docs/requirements/use_cases/shared_service_functions.rst b/docs/requirements/use_cases/shared_service_functions.rst deleted file mode 100644 index 3d370c0..0000000 --- a/docs/requirements/use_cases/shared_service_functions.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. This work is licensed under a Creative Commons Attribution 4.0 International License. -.. http://creativecommons.org/licenses/by/4.0 -.. (c) Georg Kunz - - -Shared Service Functions ------------------------- - -Description -^^^^^^^^^^^ - -This use case aims at binding multiple networks or network services to a single -vNIC (port) of a given VM. There are several specific application scenarios for -this use case: - -* Shared Service Functions: A service function connects to multiple (tenant) - networks by means of a single vNIC. - - Typically, a vNIC is bound to a single (tenant) network. Hence, in order to - directly connect a service function to multiple (tenant) networks at the same - time, multiple vNICs are needed - each vNIC binding the service function to a - separate network. For service functions requiring connectivity to a large - number of networks, this approach does not scale as the number of vNICs per VM - is limited and additional vNICs occupy additional resources on the hypervisor. - - A more scalable approach is to bind multiple networks to a single vNIC - and let the service function, which is now shared among multiple networks, - handle the separation of traffic itself. - - -* Multiple network services: A service function connects to multiple different - network types such as a L2 network, a L3(-VPN) network, a SFC domain or - services such as DHCP, IPv6 NDP, firewall/security, etc. - - -In order to achieve a flexible binding of multiple services to vNICs, a logical -separation between a vNIC (instance port) - that is, the entity that is used by -the compute service as hand-off point between the network and the VM - and a -service interface - that is, the interface a service binds to - is needed. - -Furthermore, binding network services to service interfaces instead of to the -vNIC directly enables a more dynamic management of the network connectivity of -network functions as there is no need to add or remove vNICs. - - -Requirements -^^^^^^^^^^^^ - -Northbound API -"""""""""""""" - -The API has to cover the following functionality: - -* management of instance ports - -* management of service ports - -* binding of services to service ports - - -Data models -""""""""""" - -TBD - - -Orchestration -""""""""""""" - -None. - - -Dependencies on other resources -""""""""""""""""""""""""""""""" - -The compute service needs to be enabled to consume instance ports instead of -classic Neutron ports. - - -Implementation Proposal -^^^^^^^^^^^^^^^^^^^^^^^ - -TBD |