CCNA Cisco Certified Network Associate Study Guide - FTP Server

346 Chapter 7 � Managing a Cisco Internetwork
Both the Cisco routers and the Cisco switches use the same parameters.
The output on a router looks like this:
Router#sh cdp
Global CDP information:
Sending CDP packets every 60 seconds
Sending a holdtime value of 180 seconds
Router#
Use the global commands show cdp holdtime and show cdp timer to
configure the CDP holdtime and timer on a router.
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#cdp ?
holdtime Specify the holdtime (in sec) to be sent in packets
timer Specify the rate at which CDP packets are sent(in sec)
run
Router(config)#cdp timer 90
Router(config)#cdp holdtime 240
Router(config)#^Z
You can turn off CDP completely with the no cdp run command from
global configuration mode of a router. To turn CDP off or on in a router
interface, use the no cdp enable and cdp enable commands, which are discussed
in more detail in the “Getting Port and Interface Information” section
a bit later in this chapter.
Getting Neighbor Information
The show cdp neighbor command (sh cdp nei for short) shows information
about directly connected devices. It is important to remember that CDP
packets are not passed through a Cisco switch, and you only see what is
directly attached. On a router connected to a switch, you will not see the
other devices connected to the switch.