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Chapter 76 ARP Inspection
XGS2220 Series User’s Guide
570
76.7 IPv6 Source Guard
The purpose of IPv6 source guard is to distinguish between authorized and unauthorized users by using a
binding table that validates the source of IPv6 traffic. The binding table can be manually created or be
learned through Dynamic Host Configuration Protocol version 6 snooping (DHCPv6 snooping). IPv6
source guard can deny IPv6 traffic from an unknown source. The IPv6 source guard binding table
includes:
• IPv6 address
• IPv6 prefix
• VLAN ID
• Port number
• MAC address
Enable IPv6 source guard on a port for the Switch to check incoming IPv6 packets on that port. A
packet is allowed when it matches any entry in the IPSG binding table. If a user tries to send IPv6 packets
to the Switch that do not match an entry in the IPSG binding table, the Switch will drop these packets.
The Switch forwards matching traffic normally. The IPv6 source guard related screens are available in
standalone mode.
76.8 IPv6 Source Binding Status
Use this screen to look at the current IPv6 dynamic and static bindings and to remove dynamic bindings
based on IPv6 address and/or IPv6 prefix. Bindings are used to distinguish between authorized and
unauthorized packets in the network. The Switch learns the bindings by snooping DHCP packets
(dynamic bindings) and from information provided manually by administrators (static bindings). To open
this screen, click SECURITY > IPv6 Source Guard > IP Static Binding > IP Source Binding Status.
Enabled Select Yes to enable ARP inspection on the VLAN. Select No to disable ARP inspection on the
VLAN.
Log Specify when the Switch generates log messages for receiving ARP packets from the VLAN.
None: The Switch does not generate any log messages when it receives an ARP packet from
the VLAN.
Deny: The Switch generates log messages when it discards an ARP packet from the VLAN.
Permit: The Switch generates log messages when it forwards an ARP packet from the VLAN.
All: The Switch generates log messages every time it receives an ARP packet from the VLAN.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel Click this to reset the values in this screen to their last-saved values.
Table 298 SECURITY > IPv4 Source Guard > ARP Inspection > ARP Insp. VLAN Setup (continued)
LABEL DESCRIPTION
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