Use this procedure to monitor Cisco Discovery Protocol (CDP) neighbor and interface information using show commands.
Monitor the neighboring devices and the CDP-enabled interfaces on your network.
Use these commands to view information about CDP-related devices, interfaces, neighbors, and traffic.
Procedure
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1. |
View details about specific or all neighboring devices.
Example:
Router#show cdp entry
-------------------------
Device ID: chiba
SysName : chiba
Entry address(es):
Platform: cisco 8000, Capabilities: Router
Interface: TenGigE0/2/0/19
Port ID (outgoing port): TenGigE0/0/0/2/0
Holdtime : 171 sec
Version :
26.2.1.19I
advertisement version: 2
Duplex: full
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2. |
Display information about the interfaces on which CDP is enabled.
Example:
Router#show cdp interface
Tue Jan 20 17:57:15.108 EST
TenGigE0/2/0/19 is Up
Encapsulation ether
Sending CDP packets every 10 seconds
Holdtime is 180 seconds
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3. |
View information about all neighboring devices.
Example:
Router# show cdp neighbors
Tue Jan 20 17:58:36.451 EST
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Local Intrfce Holdtme Capability Platform Port ID
chiba Te0/2/0/19 172 R 8000 Te0/0/0/2/0
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4. |
Display CDP traffic statistics.
Example:
Router#show cdp traffic
CDP counters :
Packets output: 61, Input: 58
Hdr syntax: 0, Chksum error: 0, Encaps failed: 0
No memory: 0, Invalid packet: 0, Truncated: 0
CDP version 1 advertisements output: 0, Input: 0
CDP version 2 advertisements output: 61, Input: 58
Unrecognize Hdr version: 0, File open failed: 0
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