Cisco SFS7000P-SK9 Command Reference - Page 191

Chapter 6 Show Commands show cdp show cdp Display the Cisco Discovery Protocol (CDP) advertisement information, with the show cdp command. show cdp Syntax Description This command has no arguments or keywords. Defaults CDP is running when the chassis boots. Command Modes User Execute mode, Privileged Execute mode. Usage Guidelines Platform Availability: Cisco SFS 3001, Cisco SFS 7000, Cisco SFS 7008, Cisco SFS 3012, Cisco 4x InfiniBand Switch Module for IBM BladeCenter Privilege Level: Unrestricted read-write user. Cisco Discovery Protocol (CDP) obtains protocol addresses of neighboring devices and discovers the platform of those devices. Using it with the MIB database allows applications to learn the device and the SNMP agent address of neighboring devices. CDP uses the CISCO-CDP-MIB. Each device configured for CDP sends periodic messages, known as advertisements, to a multicast address. Each device advertises at least one address at which it can receive SNMP messages. Advertisements also contain time-to-live, or hold time, information, that indicates the length of time that a receiving device holds CDP information before discarding it. Each device also listens to the CDP messages sent by others to learn when the media interfaces of neighboring devices go up or down. CDP Version-2 is the latest release of the protocol. With CDP Version-2, detailed information is provided on the VLAN Trunking Protocol (VTP) management domain and duplex modes of neighbor devices, CDP-related counters, and VLAN IDs of connecting ports. This helps Ethernet gateway configuration. CDP is run on server switches over both management-Ethernet and management-IB interfaces. Examples The following example displays the CDP advertisement information: SFS-7000P# show cdp CDP Information run : false message-interval : 60 hold-time : 180 device-id : SFS(00:05:ad:01:5f:f2) OL-9163-02 Cisco SFS 7000 Series Product Family Command Reference Guide 6-25