What Is an Uplink Port?

In the network layered design model (Internet-core layer-convergence layer-access layer-PC), the uplink port is the port connecting to the aggregation or core layer, or the port out of the WAN Internet. Can also be understood as the port for uploading data.

Uplink port

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In the network layered design model (Internet-core layer-convergence layer-access layer-PC), the uplink port is the port connecting to the aggregation or core layer, or the port out of the WAN Internet. Can also be understood as the port for uploading data.
An ICMPping is sent from the test tool to all known bridges and switches on the network, which responds by populating a forwarding database (FDB) table with the MAC addresses of neighboring bridges. Then, an SNMP query is sent to the FDB table of the selected bridge to retrieve not only the MAC address, but also the interface index associated with the port of the downstream bridge. Identify these ports as uplink ports

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