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diff --git a/examples/examples-pcvs/src/site-docs/adoc/fragments/vpnsla/policy.adoc b/examples/examples-pcvs/src/site-docs/adoc/fragments/vpnsla/policy.adoc new file mode 100644 index 000000000..b5bfcc5ab --- /dev/null +++ b/examples/examples-pcvs/src/site-docs/adoc/fragments/vpnsla/policy.adoc @@ -0,0 +1,28 @@ +// +// ============LICENSE_START======================================================= +// Copyright (C) 2016-2018 Ericsson. All rights reserved. +// ================================================================================ +// This file is licensed under the CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE +// Full license text at https://creativecommons.org/licenses/by/4.0/legalcode +// +// SPDX-License-Identifier: CC-BY-4.0 +// ============LICENSE_END========================================================= +// +// @author Sven van der Meer (sven.van.der.meer@ericsson.com) +// + +== VPN SLA Policy + +The VPN SLA policy is designed as a MEDA policy. +The first state (M = Match) takes the trigger event (a link up or down) and checks if this is a change to the known topology. +The second state (E = Establish) takes all available information (trigger event, local context) and defines what situation we have. +The third state (D = Decide) takes the situation and selects which algorithm is best to process it. +This state can select between `none` (nothing to do), `solved` (a problem is solved now), `sla` (compare the current customer SLA situation and select one to impede), and `priority` (impede non-priority customers). +The fourth and final state (A = Act) selects the right action for the taken decision and creates the response event sent to the orchestrator. + +We have added three more policies to set the local context: one for adding nodes, one for adding edges (links), and one for adding customers. +These policies do not realize any action, they are only here for updating the local context. +This mechanism is the fasted way to update local context, and it is independent of any context plugin. + +The policy uses data defined in Avro, so we have a number of Avro schema definitions. + |