Cisco交换机防止VLAN间的ARP攻击方案

6602-SHA-15F> port-security 3/12 enable
6602-SHA-15F> port-security 3/12 maximum 10
6602-SHA-15F> port-security 3/12 violation ?
　^
　SHUTDOWN RESTRICT 

ip dhcp snooping vlan 100,200 ,300,400
no ip dhcp snooping information option 
ip dhcp snooping 
ip arp inspection vlan 100,200 ,300,400
ip arp inspection log-buffer entries 1024 
ip arp inspection log-buffer logs 1024 interval 10 

ip dhcp snooping trust 
ip arp inspection trust 
ip arp inspection limit rate 15  

arp access-list static-arp 
permit ip host 202.65.3.42 mac host 0012.3F82.1B22
ip arp inspection filter static-arp vlan 201 

3w0d: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa5/16, vlan 1.
([000b.db1d.6ccd/192.168.1.200/0000.0000.0000/192.168.1.2 

3w0d: %SW_DAI-4-PACKET_RATE_EXCEEDED: 16 packets received in 184 milliseconds
on Fa5/30. ******报警 
3w0d: %PM-4-ERR_DISABLE: arp-inspection error detected on Fa5/30, 
putting Fa5/ 30 in err-disable state ******切断端口 
4500-1#sh int f 5/30 
FastEthernet5/30 is down, line protocol is down (err-disabled) 
Hardware is Fast Ethernet Port , address is 0002.b90e .3f 4d 

(bia 0002.b90e .3f 4d) 
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, 
reliability 255/255, txload 1/255, rxload 1/255 
4500-1# 

3w0d: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa5/30, vlan 1.
([000d.6078.2d95/192.168.1.100/0000.0000.0000/192.168.1.100/01:52:28 UTC Fri
Dec 29 2000 ])