CDP:思科發現協議(CDP:Cisco Discovery Protocol),CDP 基本上是用來獲取直連設備的協議地址以及發現這些設備的平臺。支持ATM, Ethernet, FDDI, frame relay, HDLC, PPP, token ring.
CDP 協議能獲取如下信息:
<!--[if !supportLists]-->1. <!--[endif]-->cisco設備名字
<!--[if !supportLists]-->2. <!--[endif]-->cisco設備類型,型號
<!--[if !supportLists]-->3. <!--[endif]-->設備運行IOS的version
<!--[if !supportLists]-->4. <!--[endif]-->設備功能,Eg:路由器,交換機或是其他
<!--[if !supportLists]-->5. <!--[endif]-->三層接口地址
<!--[if !supportLists]-->6. <!--[endif]-->設備獲取cdp信息來源
Eg:
Router#show cdp neighbors detail
-------------------------
Device ID: R1
Entry address(es):
IP address: 12.12.12.1
Platform: Cisco 7206VXR, Capabilities: Router
Interface: FastEthernet1/0, Port ID (outgoing port): FastEthernet1/0
Holdtime : 166 sec
Version :
Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Fri 11-Jul-08 04:22 by prod_rel_team
advertisement version: 2
Duplex: full
禁用CDP協議:邊界路由器一般都需要關閉該功能
Router(config)#no cdp run--------全局模式下,對所有接口生效
Router(config-if)#no cdp enable-------------接口模式下禁用,針對當前接口