Web Management Guide-R04

Table Of Contents
Chapter 12
| Security Measures
ARP Inspection
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IPv6 Address/IPv6 Prefix – IPv6 address/prefix corresponding to the client.
Type – Shows the entry type:
DHCP – Dynamic DHCPv6 binding, stateful address.
ND – Dynamic Neighbor Discovery binding, stateless address.
Web Interface
To display the binding table for IPv6 Source Guard:
1. Click Security, IPv6 Source Guard, Dynamic Binding.
2. Mark the search criteria, and enter the required values.
3. Click Query
Figure 247: Showing the IPv6 Source Guard Binding Table
ARP Inspection
ARP Inspection is a security feature that validates the MAC Address bindings for
Address Resolution Protocol packets. It provides protection against ARP traffic with
invalid MAC-to-IP address bindings, which forms the basis for certain “man-in-the-
middle” attacks. This is accomplished by intercepting all ARP requests and
responses and verifying each of these packets before the local ARP cache is
updated or the packet is forwarded to the appropriate destination. Invalid ARP
packets are dropped.
ARP Inspection determines the validity of an ARP packet based on valid IP-to-MAC
address bindings stored in a trusted database – the DHCP snooping binding
database (see “DHCP Snooping Global Configuration” on page 371). This database
is built by DHCP snooping if it is enabled on globally on the switch and on the
required VLANs. ARP Inspection can also validate ARP packets against user-
configured ARP access control lists (ACLs) for hosts with statically configured
addresses (see “Configuring an ARPACL” on page 349).