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The link discovery services uses both LLDPs and broadcast packets (aka BDDPs) to detect links. The LLDP destination MAC is 01:80:c2:00:00:0e and the BDDP destination MAC is ff:ff:ff:ff:ff:ff (broadcast address). The ether type for LLDPs and BDDPs is 0x88cc and 0x8999. There are two assumptions made in order for the topology to be learned properly.
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Getting all devices
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curl -s http://localhost:8080/wm/topology/links/json
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