An example of usage is the Link Layer Discovery Protocol which allows for the sending of organizational-specific information as a TLV element within LLDP packets.
CDP support was replaced with IEEE 802.1AB Link Layer Discovery Protocol ( LLDP ), an IEEE standard that is implemented by multiple vendors and is functionally similar to CDP.
The IEEE 802.1AB or Link Layer Discovery Protocol that is supported on most Nortel equipment is a standards based ( vendor-neutral ) protocol that supports multi-vendor environments.