網絡維護中,如果要將某個用戶所在接口重新劃分VLAN,知道某個用戶的IP地址,現在要查出用戶所用接口,如下:
1、cisco-6506#show ip arp | include 172.16.16.27
Internet 172.16.16.27 0 e89a.8f6d.b8ed ARPA Vlan16 **這裏就會是顯示IP 地址對應的電腦的MAC地址e89a.8f6d.b8ae
2、cisco-6506#show mac-address-table dynamic address e89a.8f6d.b8ed
Legend: * - primary entry
age - seconds since last seen
n/a - not available
vlan mac address type learn age ports
------+----------------+--------+-----+----------+--------------------------
Supervisor:
* 16 e89a.8f6d.b8ed dynamic Yes 0 Gi3/3
*****這裏就表示接口在GI3/3,或連接GI3/3這個接口的交換機上
3、cisco-6506#show cdp neighbors GI3/3 detail ***通過這個命令查找與GI3/3接口相連接的交換機詳細信息,然後登錄上去同樣的方法就可以查到IP對應的交換機接口了。例如:
4、cisco-2#show mac-address-table dynamic address e89a.7c6d.b8ae
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
沒有是顯示出端口號,那麼說明還在下層交換機
5、cisco-2#show cdp neighbors g0/1 detail
根據顯示的詳細信息再登錄下一層交換機,依據上面的方法再查看,直到找到爲止。