protocol itself. In the show cdp entry fred command in Example 2-4, all the details learned by
CDP are shown and highlighted. To know that fred is the device identifier of a neighbor, the
show cdp neighbor command can be used to summarize the information about each neighbor.
Show cdp neighbor detail lists the detail of all neighbors, in the same format as show cdp
entry. In addition, show cdp traffic lists the overhead that CDP introduces to perform its
functions.
Platform: cisco 2500, Capabilities: Router
Interface: Serial1, Port ID (outgoing port): Serial1
Holdtime : 164 sec
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-D-L), Version 12.0(6), RELEASE SOFTWARE (fc1)
Copyright 1986-1999 by cisco Systems, Inc.
Compiled Tue 10-Aug-99 23:52 by phanguye
Device ID: Yosemite
Entry address(es):
IP address: 10.1.5.252
Novell address: 5.0200.bbbb.bbbb
Platform: cisco 2500, Capabilities: Router
Interface: Serial0.2, Port ID (outgoing port): Serial0.2
Holdtime : 146 sec
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-D-L), Version 12.0(6), RELEASE SOFTWARE (fc1)
Copyright 1986-1999 by cisco Systems, Inc.
Compiled Tue 10-Aug-99 23:52 by phanguye
Ethernet0 is up, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
Serial0.2 is up, line protocol is up
Encapsulation FRAME-RELAY
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
Serial1 is up, line protocol is up
Encapsulation HDLC
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
CDP counters :
Packets output: 41, Input: 21
Hdr syntax: 0, Chksum error: 0, Encaps failed: 0
No memory: 0, Invalid packet: 0, Fragmented: 0