HP NC326m HP ProLiant Essentials Intelligent Networking Pack - Windows Edition - Page 32

Using discovery protocol In this section About Cisco Discovery Protocol and Link Layer Discovery Protocol 32 About Cisco Discovery Protocol and Link Layer Discovery Protocol CDP and LLDP are layer two, neighbor device discovery protocols that run on all networking devices such as routers, access servers, bridges, and switches. Using CDP or LLDP, a device can advertise its existence to other devices and also receive information about neighboring devices on the same LAN or on the remote side of a WAN. NOTE: LLDP is not supported on systems running Windows® 2000. CDP and LLDP are media and protocol independent protocols that allow two systems to learn about each other even if they use different network layer protocols. CDP and LLDP obtain protocol addresses of neighboring devices and discover the platform of those devices including information about the interfaces a router uses. The HP NCU supports CDP Version 1, CDP Version 2, and LLDP. The following information is provided by CDP Version 1, CDP Version 2 and LLDP: • Protocol Type • Device name • Port ID • Platform name of the device • Type of device The following information is provided only with CDP Version 2 and LLDP: • VTP management domain name • Native Vlan ID for untagged packets on the interface • Duplex Each team member configured for CDP or LLDP registers an address at which it can receive CDP or LLDP messages. The advertisements that come from network devices such as the switch will contain this information. A network administrator can use the information from CDP or LLDP to build a basic picture of their network, which can be used to detect misconfigurations and troubleshooting problems on the network. Using discovery protocol 32