VendorLanProtocolFamily

Some vendors have created their own proprietary layer 2 protocols to exchange information that only other devices from that vendor can use.

History

The first protocol known to me was Cisco's CDP. Other vendors followed.

Protocols by vendor

Allied Telesis

• EPSR: Ethernet Protection Switching Ring

Cisco

• CDP: The Cisco Discovery Protocol

• DTP: Dynamic Trunking Protocol

• PagP: Port Aggregation Protocol (PagP)

• STP: Cisco Per Vlan Spanning Tree (PVST+)

• UDLD: UniDirectional Link Detection

• VTP: Virtual Trunking Protocol

Enterasys

• ISMP: Inter Switch Message Protocol

Extreme Networks

• EAPS: Ethernet Automatic Protection Switching (on top of EDP)

• EDP: Extreme Discovery Protocol

• ESRP: Extreme Standby Router Protocol (on top of EDP)

Foundry

• FDP: Foundry Discovery Protocol?

• VSRP: Virtual Switch Redundancy Protocol

Huawei

• RRPP: Rapid Ring Protection Protocol

Nortel

• IST: InterSwitch Trunk (IST)

• MRP: Metro Ring Protocol (MRP, also from Foundry)

• MLT/SMLT/DSMLT/RSMLT: the various Multi-Line Trunking protocols

• VLACP: Virtual LACP (VLACP)

• SONMP

Raptor

• RAST

External links

• add links to pages and sites with information about that protocol family, such as an organization responsible for defining and maintaining the protocol family

Discussion