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Switching Commands
141
ProSafe M4100 and M7100 Managed Switches
The following shows sample 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 0/1
00:00:00:00:00:09 1.2.3.4 dhcp-snooping 3 0/1
00:00:00:00:00:0A 1.2.3.4 dhcp-snooping 4 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.
Default disabled
Format ip arp inspection vlan vlan-list
Mode
no ip arp inspection vlan
Use this command to disable Dynamic ARP Inspection on a list of comma-separated VLAN
ranges.
Format no ip arp inspection vlan vlan-list
Mode
VLAN
VLAN for the entry
.
Interface
IP address of the interface in slot/port format.
Global Config
Global Config
Term Definition