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CDP Commands
Cisco Discovery Protocol (CDP) is a proprietary protocol that discovers information
about neighboring devices by passing messages across the Data Link Layer. It is
used to share information about nearby network equipment. Participating devices
send CDP announcements from each connected network interface to the multicast
address 01-00-0C-CC-CC-CC. These packets may be received by any networking
devices that support CDP. By default, CDP announcements are sent every 60
seconds. Each device that supports CDP stores the information received from other
devices in a table that can be viewed using the
show cdp neighbors
command. This
information is refreshed each time an announcement is received, and the holdtime
for that entry is reinitialized.
The information contained in CDP announcements may include the CDP version,
host name, IP address and port identifier from which the announcement was sent,
device type, and other device specific information.
Table 110: CDP Commands
Command
Function
Mode
cdp
Enables CDP globally on the switch
GC
cdp hold-time
Specifies the amount of time the receiving device
should hold a CDP packet sent from this switch
GC
cdp transmit-interval
Specifies the periodic transmission interval for CDP
advertisements
GC
cdp version
Specifies the CDP version to use for transmitting
advertisements
GC
cdp
Enables CDP on the selected interface
IC
clear cdp table
Clears the CDP neighbor table
PE
show cdp
Shows global CDP configuration settings
PE
show cdp interface
Shows whether or not CDP is enabled on an
interface
PE
show cdp neighbors
Shows information about neighbors obtained by
monitoring CDP advertisements
PE
Содержание EX-3524
Страница 2: ......
Страница 28: ...Figures 28 ...
Страница 34: ...Section I Getting Started 34 ...
Страница 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Страница 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Страница 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Страница 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Страница 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Страница 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Страница 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Страница 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Страница 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Страница 366: ...Chapter 15 Address Table Commands 366 ...
Страница 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Страница 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Страница 578: ...Section I Appendices 578 ...
Страница 594: ...Appendix C Customer Support Manuals 594 ...