| 摘要 |
<p>An ICMP ping is sent from a test instrument to all known bridges and switches on a network, which respond by populating the forwarding data base (FDB) tables with the MAC addresses of adjacent bridges. Then an SNMP query is sent to the FDB table of a selected bridge, retrieving not only MAC addresses, but interface indices associated with ports of downstream bridges. These ports are identified as uplink ports.</p> |
