Managed Switch CLI Manual, Release 8.0
Switching Commands
3-130
v1.0, July 2009
Example: The following shows example CLI display output for the command.
(switch) #show ip source binding
MAC Address IP Address Type Vlan Interface
----------------- --------------- ------------- ----- -------------
00:00:00:00:00:08 1.2.3.4 dhcp-snooping 2 1/0/1
00:00:00:00:00:09 1.2.3.4 dhcp-snooping 3 1/0/1
00:00:00:00:00:0A 1.2.3.4 dhcp-snooping 4 1/0/1
Dynamic ARP Inspection Commands
Dynamic ARP Inspection (DAI) is a security feature that rejects invalid and malicious ARP
packets. DAI prevents a class of man-in-the-middle attacks, where an unfriendly station intercepts
traffic for other stations by poisoning the ARP caches of its unsuspecting neighbors. The miscreant
sends ARP requests or responses mapping another station’s IP address to its own MAC address.
DAI relies on DHCP snooping. DHCP snooping listens to DHCP message exchanges and builds a
binding database of valid {MAC address, IP address, VLAN, and interface} tuples.
When DAI is enabled, the switch drops ARP packets whose sender MAC address and sender IP
address do not match an entry in the DHCP snooping bindings database. You can optionally
configure additional ARP packet validation.
ip arp inspection vlan
Use this command to enable Dynamic ARP Inspection on a list of comma-separated VLAN
ranges.
no ip arp inspection vlan
Use this command to disable Dynamic ARP Inspection on a list of comma-separated VLAN
ranges.
Default
disabled
Format
ip arp inspection vlan
vlan-list
Mode
Global Config
Summary of Contents for FSM726v3 - ProSafe Fast Ethernet L2 Managed Switch
Page 4: ...v1 0 July 2009 iv...
