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Overview

SimpleFabric application is built to replace legacy leaf networks where lP subnets are collocated with each leaf L2 switches and do simple IP routing to upper gateway to Internet

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Features

L2 Forwarding

• L2 Unicast Forwarding: Intra-Subnet is handled by Destination MAC matching Intents; based on HostService information
• L2 Broadcast Forwarding: Intra-Subnet broadcast is handles by Destination MAC matching Intents; base on L2Network configuration

...

• All forwarding are activated by Intents Framework which auto reconfigures on link failures

Configurations

L2Networks

• name: name of L2Network to be used by IpSubnets
• interfaces: interfaces names of ports of this L2Network
• l2Forward: yes to enable L2 Destination MAC based forwarding (default: yes)
• l2Broadcast: yes to enable L2 Destination FF:FF:FF:FF:FF:FF MAC to be broadcast to all l2Network ports except the incoming port (default: yes)

IpSubnets

• ipPrefix: IP subnet range
• gatewayIp: Virtual Gateway IP address
• gatewayMac: Virtual Gateway Mac MAC address
• l2NetworkName: L2Network this IpSubnet is collocated

BorderRoutesBorder Routes

• ipPrefix: route prefix to be matched on destination IP address (NOTE: IpSubnet ipPrefix matching has priority over borderRoute ipPrefix)
• nextHop: outer gateway IP to which forward the matched packet; should be a valid IP address of IpSubnets

Devices, Ports / Interfaces

      To be used for L2Networks's interface fields

Example network-cfg.json file:

{

  "devicesdevices":{

    ... list of devices ...

    "of:0000000000000011":{ "basic":{ "name":"LS1", "latitude":35, "longitude":-100 } },

    "of:0000000000000012":{ "basic":{ "name":"LS2", "latitude":35, "longitude":-90  } },

    "of:0000000000000021":{ "basic":{ "name":"SS1", "latitude":40, "longitude":-100 } },

    "of:0000000000000022":{ "basic":{ "name":"SS2", "latitude":40, "longitude":-90  } }

  },

  "ports" : {

    ... list of port/interfaces ...

    "of:0000000000000011/1" : { "interfaces" : [ { "name" : "h11" } ] },

    "of:0000000000000011/2" : { "interfaces" : [ { "name" : "h12" } ] },

   "of:0000000000000011/3" : {"interfaces" : [{"name" : "h13"}]},    "of:0000000000000011/4" : {"interfaces" : [{"name" : "h14"}]},    "of:0000000000000011/5" : {"interfaces" : [{"name" : "d11"}]},...

    "of:0000000000000011/6" : {"interfaces" : [{"name" : "d12"}]},    "of:0000000000000011/7" : {"interfaces" : [{"name" : "LS1_SS1"}]},    "of:0000000000000011/8" : {"interfaces" : [{"name" : "LS1_SS2"}]},    "of:0000000000000012/1" : { "interfaces" : [ { "name" : "h21" } ] } ,

    "of:0000000000000012/2" : { "interfaces" : [ { "name" : "h22" } ] },

    "of:0000000000000012/3" : {"interfaces" : [{"name" : "h23"}]},    "of:0000000000000012/4" : {"interfaces" : [{"name" : "h24"}]},    "of:0000000000000012/5" : {"interfaces" : [{"name" : "d21"}]},    "of:0000000000000012/6" : {"interfaces" : [{"name" : "d22"}]},    "of:0000000000000012/7" : {"interfaces" : [{"name" : "LS2_SS1"}]},    "of:0000000000000012/8" : {"interfaces" : [{"name" : "LS2_SS2"}]},    "of:0000000000000021/1" : {"interfaces" : [{"name" : "SS1_LS1"}]},    "of:0000000000000021/2" : {"interfaces" : [{"name" : "SS1_LS2"}]},    "of:0000000000000022/1" : {"interfaces" : [{"name" : "SS2_LS1"}]},    "of:0000000000000022/2" : {"interfaces" : [{"name" : "SS2_LS2"}]}

  },

...

  },

  "  "apps" : {

    "org.onosproject.simplefabric" : {

      "simpleFabric" : {

        "l2Networks" : [

          { "name" : "LEAF1", "interfaces" : ["h11", "h12", "h13", "h14", "d11", "d12" ], "l2Forward" : true },

          { "name" : "LEAF2", "interfaces" : ["h21", "h22", "h23", "h24", "d21", "d22" ], "l2Forward" : true }

        ],

        "ipSubnets" : [

           { "ipPrefix" : "10.0.1.0/24", "gatewayIp" : "10.0.1.1", "gatewayMac" : "00:00:10:00:01:01", "l2NetworkName" : "LEAF1" },

           { "ipPrefix" : "10.0.2.0/24", "gatewayIp" : "10.0.2.1", "gatewayMac" : "00:00:10:00:02:01", "l2NetworkName" : "LEAF2" }

        ],

        "borderRoutes" : [

           { "ipPrefix" : "0.0.0.0/0", "nextHop" : "10.0.1.2" }

        ]

      }

    }

  }

}

Modules

Topology configurations and events are all maintained by SimpleFabricManager SimpleFabricService/Manager and notified to sub modules to apply updates.

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