實驗3：CDP命令操作

  • 2020 年 1 月 11 日
  • 筆記

 Cisco Discovery Protocol （CDP）從名字我們就可以看出這是Cisco專有的了，建議大家學習CCNA的時候盡量熟悉全拼 不要簡單的記下縮寫！ CDP可以收集相鄰的設備的硬體和協議資訊 CDP有兩個全局參數 ，可以進行設置 CDP timer(CDP定時器) 和 CDP holdtime（保持時間） CDP定時器是多長時間將CDP數據包傳輸到所有介面的時間量。 CDP保持時間是設備保留從相鄰設備接收到的數據包的時間量。 下面介紹下CDP的幾個命令和區別 show cdp neighbors :作用是顯示有關直連設備的資訊，其中包括設備的主機名，接收數據包的埠或介面，保持時間，鄰居設備的性能，設備類型和連接的埠ID show cdp neighbors detail 顯示的就比較詳細了 和以上比較多了，直連設備的IP地址和IOS版本號。 show cdp entry * 與 show cdp neighbors detail 相同。 show cdp entry * protocols 顯示直連鄰居的IP地址。 show cdp entry * version 顯示直連鄰居的IOS版本。 show cdp traffic 顯示了設備發送和接收的CDP數據包。 show cdp interface 顯示每個介面使用的CDP資訊，包括線路的封裝類型，定時器和保持時間。 關閉CDP服務 no cdp run ,關閉某個介面的CDP 進入介面模式下 no cdp enable 當大家看完以上的命令的時候，想像一下，給你一個路由器 然後需要你根據CDP的 資訊來配置IP和線纜的連接類型 以及設備類型 ，大家應該能做出來吧！下面我們來做以上實驗

Router>en Router#conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#host ccna1                                   設置路由器名 ccna1(config)#enable password cisco1            設置password ccna1(config)#enable secret cisco2                   設置secret ccna1(config)#line vty 0 4 ccna1(config-line)#login % Login disabled on line 66, until 'password' is set % Login disabled on line 67, until 'password' is set % Login disabled on line 68, until 'password' is set % Login disabled on line 69, until 'password' is set % Login disabled on line 70, until 'password' is set ccna1(config-line)#pass cisco3                            設置vty密碼 ccna1(config-line)#exit ccna1(config)#service password-encryption ccna1(config)#int s1/1/0 ccna1(config-if)#ip add 202.119.249.1 255.255.255.0                    設置s0 ccna1(config-if)#clock rate 56000 ccna1(config-if)#no shut

%LINK-5-CHANGED: Interface Serial1/1/0, changed state to down ccna1(config-if)#exit ccna1(config)#exit %SYS-5-CONFIG_I: Configured from console by console ccna1#

ccna2配置

Router>en Router#Conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#host ccna2 ccna2(config)#enable password cisco1 ccna2(config)#enable secret cisco2 ccna2(config)#line vty 0 4 ccna2(config-line)#login % Login disabled on line 66, until 'password' is set % Login disabled on line 67, until 'password' is set % Login disabled on line 68, until 'password' is set % Login disabled on line 69, until 'password' is set % Login disabled on line 70, until 'password' is set ccna2(config-line)#password cisco3 ccna2(config-line)#exit ccna2(config)#service password-encryption ccna2(config)#int s1/1/0 ccna2(config-if)#ip add 202.119.249.2 255.255.255.0 ccna2(config-if)#no shut

%LINK-5-CHANGED: Interface Serial1/1/0, changed state to up ccna2(config-if)#exit ccna2(config)#int s1/1/1 ccna2(config-if)#ip add 202.119.248.1 255.255.255.0 ccna2(config-if)#clock rate 56000 ccna2(config-if)#no shut

%LINK-5-CHANGED: Interface Serial1/1/1, changed state to down ccna2(config-if)#end %SYS-5-CONFIG_I: Configured from console by console

ccna3配置

Router>en Router#conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#host ccna3 ccna3(config)#enable password cisco1 ccna3(config)#enable secret cisco2 ccna3(config)#line vty 0 4 ccna3(config-line)#login % Login disabled on line 66, until 'password' is set % Login disabled on line 67, until 'password' is set % Login disabled on line 68, until 'password' is set % Login disabled on line 69, until 'password' is set % Login disabled on line 70, until 'password' is set ccna3(config-line)#pass cisco3 ccna3(config-line)#exit ccna3(config)#service password-encryption ccna3(config)#int s1/1/0 ccna3(config-if)#ip add 202.119.248.2 255.255.255.0 ccna3(config-if)#no shut

%LINK-5-CHANGED: Interface Serial1/1/0, changed state to up ccna3(config-if)# %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1/0, changed state to upend %SYS-5-CONFIG_I: Configured from console by console ccna3#

主要內容ccna2上操作： ccna2>en Password: ccna2#show cdp neighbors Capability Codes: R – Router, T – Trans Bridge, B – Source Route Bridge                   S – Switch, H – Host, I – IGMP, r – Repeater, P – Phone Device ID    Local Intrfce   Holdtme    Capability   Platform    Port ID ccna1        Ser 1/1/0        167            R       C2800       Ser 1/1/0 ccna3        Ser 1/1/1        161            R       C2800       Ser 1/1/0 ccna2#show cdp Global CDP information:     Sending CDP packets every 60 seconds     Sending a holdtime value of 180 seconds     Sending CDPv2 advertisements is enabled

ccna2#show cdp entry *

Device ID: ccna1 Entry address(es):   IP address : 202.119.249.1 Platform: cisco C2800, Capabilities: Router Interface: Serial1/1/0, Port ID (outgoing port): Serial1/1/0 Holdtime: 158

Version : Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 18-Jul-07 06:21 by pt_rel_team

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Device ID: ccna3 Entry address(es):   IP address : 202.119.248.2 Platform: cisco C2800, Capabilities: Router Interface: Serial1/1/1, Port ID (outgoing port): Serial1/1/0 Holdtime: 152

Version : Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 18-Jul-07 06:21 by pt_rel_team

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ccna2#show cdp entry ccna1

Device ID: ccna1 Entry address(es):   IP address : 202.119.249.1 Platform: cisco C2800, Capabilities: Router Interface: Serial1/1/0, Port ID (outgoing port): Serial1/1/0 Holdtime: 139

Version : Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 18-Jul-07 06:21 by pt_rel_team

advertisement version: 2 Duplex: full —————————

ccna2#show cdp entry ccna3

Device ID: ccna3 Entry address(es):   IP address : 202.119.248.2 Platform: cisco C2800, Capabilities: Router Interface: Serial1/1/1, Port ID (outgoing port): Serial1/1/0 Holdtime: 129

Version : Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 18-Jul-07 06:21 by pt_rel_team

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ccna2#show cdp entry ccna2

ccna2#un all All possible debugging has been turned off

ccna2#conf t Enter configuration commands, one per line.  End with CNTL/Z. ccna2(config)#cdp run ccna2(config)#exit %SYS-5-CONFIG_I: Configured from console by console ccna2#show cdp interfac Vlan1 is administratively down, line protocol is down   Sending CDP packets every 60 seconds   Holdtime is 180 seconds FastEthernet0/0 is administratively down, line protocol is down   Sending CDP packets every 60 seconds   Holdtime is 180 seconds FastEthernet0/1 is administratively down, line protocol is down   Sending CDP packets every 60 seconds   Holdtime is 180 seconds Serial1/1/0 is up, line protocol is up   Sending CDP packets every 60 seconds   Holdtime is 180 seconds Serial1/1/1 is up, line protocol is up   Sending CDP packets every 60 seconds   Holdtime is 180 seconds ccna2#debug ?   eigrp        EIGRP Protocol information   frame-relay  Frame Relay   ip           IP information

搞定。。。。。

VirMach 便宜 VPS

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