Complete Protocol dictionary, glossary and reference
DRIP: Duplicate Ring Protocol
Duplicate Ring Protocol (DRIP), a Cisco protocol, runs on Cisco routers and switches that support Virtual LAN networking, and is used to identify active Token Ring VLANs. DRIP information is used for all-routes explorer filtering and detecting the configuration of duplicate Token ring Concentrator Relay Function (TrCRF) across routers and switches, which would cause a TrCRF to be distributed across ISL trunks. DRIP sends advertisements to a multicast address so the advertisements are received by all neighboring devices. The advertisement includes VLAN information for the source device only.