show ip arp命令可以得到IP地址与MAC地址的对应关系,show mac-address-table可以得到MAC地址与端口的对应关系,根据这两组对应关系,我们就可以得到IP地址与端口的对应关系。
命令总结:
1.静态绑定arp表项后,无老化时间
R2(config)#arp 192.168.1.2 cc01.0614.0000 arpa
2.show ip arp ---查看arp表
R2#show ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.1 1 cc00.0614.0000 ARPA FastEthernet0/0
Internet 192.168.1.2 - cc01.0614.0000 ARPA
Internet 192.168.1.3 0 cc02.0614.0000 ARPA FastEthernet0/0
Internet 192.168.1.4 1 cc03.0614.0000 ARPA FastEthernet0/0
R2#
3.show mac-address-table ---查看mac-address-table,适用于二层接口
4.修改arp老化时间
R2(config)#int f0/0
R2(config-if)#arp timeout ?
<0-2147483> Seconds
5.静态绑定mac-address-table
R1(config)#mac-address-table static cc01.0614.0000 interface fastEthernet 1/2 vlan 2
6.清除arp缓存,刷新arp表
R1#clear arp-cache ?
A.B.C.D IP address
interface Clear the entire ARP cache on the interface
vrf Clear entries for a VPN Routing/Forwarding instance
R1#clear arp-cache interface fastEthernet 1/2
R1#
7.no mac-address-table static 后需要刷新mac-address-table
clear mac-address-table
From:http://www.cisco-club.com.cn/space-129343-do-blog-id-5263.html
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