實驗目的
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1、了解鏈路層發現協議LLDP的運行原理
2、掌握鏈路層發現協議LLDP的配置方法
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實驗拓撲
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實驗需求
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1、根據實驗拓撲圖，完成設備的基本配置；
2、在R1上使用LLDP查看SW1和R2的設備信息；
3、注意：LLDP默認關閉，需要手工打開。
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實驗步驟
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步驟1：設備的基本配置
配置R 1 ：
Router>enableRouter#configure terminalRouter(config)#hostname R1R1(config)#no ip domain-lookupR1(config)#line console 0R1(config-line)#exec-timeout 0 0R1(config-line)#logging synchronousR1(config-line)#exitR1(config)#interface ethernet0/0R1(config-if)#ip address 192.168.1.254 255.255.255.0R1(config-if)#no shutdownR1(config-if)#exitR1(config)#interface ethernet0/1R1(config-if)#ip address 192.168.12.1 255.255.255.0R1(config-if)#no shutdownR1(config-if)#endR1#
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配置R 2 ：
Router>enableRouter#configure terminalRouter(config)#hostname R2R2(config)#no ip domain-lookupR2(config)#line console 0R2(config-line)#exec-timeout 0 0R2(config-line)#logging synchronousR2(config-line)#exitR2(config)#interface ethernet0/0R2(config-if)#ip address 192.168.12.2 255.255.255.0R2(config-if)#no shutdownR2(config-if)#endR2#
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配置S W1 ：
Switch>enableSwitch#configure terminalSwitch(config)#hostname SW1SW1(config)#no ip domain-lookupSW1(config)#line console 0SW1(config-line)#exec-timeout 0 0SW1(config-line)#logging synchronousSW1(config-line)#exitSW1(config)#interface vlan 1SW1(config-if)#ip address 192.168.1.1 255.255.255.0SW1(config-if)#no shutdownSW1(config-if)#exitSW1(config)#ip default-gateway 192.168.1.254SW1(config)#endSW1#
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步驟2：配置L LDP
配置R1：R1>enableR1#configure terminalR1(config)#lldp run //運行LLDP
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配置R2：R2>enableR2#configure terminalR2(config)#lldp?run
配置SW1：SW1>enableSW1#configure terminalSW1(config)#lldp run
實驗檢查
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步驟1：檢查設備的接口狀態
檢查R 1 ：
R1#show ip interface briefInterface IP-Address OK? Method Status ProtocolEthernet0/0 192.168.1.254 YES manual up up Ethernet0/1 192.168.12.1 YES manual up up Ethernet0/2 unassigned YES unset administratively down down Ethernet0/3 unassigned YES unset administratively down down R1使用到的接口已經配置好IP地址，并且是up up狀態。
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檢查R2：R2#show ip interface briefInterface IP-Address OK? Method Status ProtocolEthernet0/0 192.168.12.2 YES manual up up Ethernet0/1 unassigned YES TFTP administratively down down Ethernet0/2 unassigned YES unset administratively down down Ethernet0/3 unassigned YES unset administratively down down R2使用到的接口已經配置好IP地址，并且是up up狀態。
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檢查SW1：SW1#show ip interface briefInterface IP-Address OK? Method Status ProtocolEthernet0/0 unassigned YES unset up up Ethernet0/1 unassigned YES unset up up Ethernet0/2 unassigned YES unset up up Ethernet0/3 unassigned YES unset up up Vlan1 192.168.1.1 YES manual up up SW1使用到的接口已經配置好IP地址，并且是up up狀態。
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步驟2：使用 LLD P查看物理相連的設備信息
檢查R1上運行LLDP的接口:R1#show lldp interfaceEthernet0/0: Tx: enabled Rx: enabled Tx state: IDLE Rx state: WAIT FOR FRAMEEthernet0/1: Tx: enabled Rx: enabled Tx state: IDLE Rx state: WAIT FOR FRAMEEthernet0/2: Tx: enabled Rx: enabled Tx state: INIT Rx state: WAIT PORT OPEREthernet0/3: Tx: enabled Rx: enabled Tx state: INIT --More--R1的E0/0和E0/1接口已經運行LLDP。
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檢查R1上的LLDP鄰居:R1#show lldp neighborsCapability codes: (R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device (W) WLAN Access Point, (P) Repeater, (S) Station, (O) OtherDevice ID Local Intf Hold-time Capability Port IDSW1 Et0/0 120 R Et0/0R2 Et0/1 120 R Et0/0Total entries displayed: 2R1上能夠看到SW1和R2兩個LLDP鄰居。
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檢查R1上的LLDP條目:R1#show lldp entry *Capability codes: (R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device (W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other------------------------------------------------Local Intf: Et0/0 //R1本端的接口Chassis id: aabb.cc00.3000Port id: Et0/0 //對端的接口Port Description: Ethernet0/0System Name: SW1 //對端設備的主機名System Description:Cisco IOS Software, Linux Software (I86BI_LINUXL2-ADVENTERPRISEK9-M), Version 15.2(CML_NIGHTLY_20190423)FLO_DSGS7, EARLY DEPLOYMENT DEVELOPMENT BUILD, synced to V152_6_0_81_ETechnical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2019 byTime remaining: 103 secondsSystem Capabilities: B,REnabled Capabilities: RManagement Addresses: IP: 192.168.1.1 //SW1的IP地址Auto Negotiation - not supportedPhysical media capabilities - not advertisedMedia Attachment Unit type - not advertisedVlan ID: - not advertised------------------------------------------------Local Intf: Et0/1Chassis id: aabb.cc00.2000Port id: Et0/0Port Description: Ethernet0/0System Name: R2System Description:Cisco IOS Software, Linux Software (I86BI_LINUX-ADVENTERPRISEK9-M), Version 15.7(3)M2, DEVELOPMENT TEST SOFTWARETechnical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2018 by Cisco Systems, Inc.Compiled Wed 28-Mar-18 11:18 by prod_rel_teTime remaining: 98 secondsSystem Capabilities: B,REnabled Capabilities: RManagement Addresses: IP: 192.168.12.2Auto Negotiation - not supportedPhysical media capabilities - not advertisedMedia Attachment Unit type - not advertisedVlan ID: - not advertisedTotal entries displayed: 2R1有兩個CDP鄰居，分別是SW1和R2。
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