Modeling openflow resources and services

[xi-yang]

Model OpenFlow Device (nml:Node) or Network (nml:Topology)

A clean-slate device or network with openflow capability use nml:hasService to point to a OpenflowService which is of mrs:OpenflowService type. This instance will include the ports / bidirectionalPorts that operate in openflow mode.

OpenflowService provides one or more FlowTable instances.

FlowTable provides Flows to indicate dynamically instantiated services. In clean-state status, FlowTable provides none.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001>
a nml:Node , owl:NamedIndividual ;
nml:hasBidirectionalPort <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:port-s1-eth2> , <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:port-s1-eth1> ; nml:hasService <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service>.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service>
a mrs:OpenflowService , owl:NamedIndividual ;
nml:hasBidirectionalPort <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:port-s1-eth2> , <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:port-s1-eth1> ;
mrs:providesFlowTable <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1> .

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1>
a mrs:FlowTable , owl:NamedIndividual .

Model Dynamic Flows

When a Flow is instantiated in a FlowTable. It should be modeled as follows.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1>
a mrs:FlowTable , owl:NamedIndividual ;
mrs:providesFlow
<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345> ,
<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-67890> .

Each flow is modeled with match rules and action rules, both through FlowRule resources.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345>
a mrs:Flow, owl:NamedIndividual ;
mrs:flowMatch <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-0> ;
mrs:flowMatch <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-1> ;
mrs:flowMatch <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-2> ;
mrs:flowMatch <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-3> ;
mrs:flowMatch <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-4> ;
mrs:flowAction <urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-action-0>

Each match rule is a type-value pair to match against one flow label. There are normally multiple rules.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-0>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "IN_PORT" ;
mrs:value "1" .

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-1>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "ETH_SRC_MAC" ;
mrs:value "00:00:00:00:00:13" .

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-2>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "ETH_DST_MAC" ;
mrs:value "00:00:00:00:00:01" .

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-3>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "ETH_SRC_VLAN" ;
mrs:value "100" .

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-match-4>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "ETH_DST_VLAN" ;
mrs:value "101" .

Each action rule is also a type-value pair to indicate a treatment action. There could be one or more action rules.

<urn:ogf:network:onos.maxgigapop.net:network:of:0000000000000001:openflow-service:flow-table-1:flow-12345:rule-action-0>
a mrs:FlowRule, owl:NamedIndividual ;
mrs:type "OUT_PORT" ;
mrs:value "2" .

References

Schema / Ontology definition is here:
https://github.com/MAX-UMD/nml-mrs-model/blob/master/schema/rdf-owl/nml-mrs-ext-v2.owl

The modified MRS Java base with Openflow resource and property types is here:
https://github.com/MAX-UMD/VersaStack/blob/CoWork-ONOS-xyang/VersaStack-ejb/src/main/java/net/maxgigapop/mrs/common/Mrs.java