C
HAPTER
25
| General Security Measures
IPv6 Source Guard
– 926 –
EXAMPLE
Console#show ip source-guard binding
MAC Address IP Address Lease(sec) Type VLAN Interface
----------------- --------------- ---------- -------------- --------- ---------
11-22-33-44-55-66 192.168.0.99 0 Static 1 Eth 1/5
Console#
IPV6 SOURCE GUARD
IPv6 Source Guard is a security feature that filters IPv6 traffic on non-
routed, Layer 2 network interfaces based on manually configured entries in
the IPv6 Source Guard table, or dynamic entries in the Neighbor Discovery
Snooping table or DHCPv6 Snooping table when either snooping protocol is
enabled (see "DHCPv6 Snooping" on page 910). IPv6 source guard can be
used to prevent traffic attacks caused when a host tries to use the IPv6
address of a neighbor to access the network. This section describes
commands used to configure IPv6 Source Guard.
ipv6 source-guard
binding
This command adds a static address to the source-guard binding table. Use
the no form to remove a static entry.
SYNTAX
ipv6 source-guard binding mac-address vlan vlan-id ipv6-address
interface interface
no ipv6 source-guard binding mac-address vlan vlan-id
mac-address - A valid unicast MAC address.
vlan-id - ID of a configured VLAN (Range: 1-4094)
ipv6-address - Corresponding IPv6 address. This address must be
entered according to RFC 2373 “IPv6 Addressing Architecture,”
using 8 colon-separated 16-bit hexadecimal values. One double
colon may be used in the address to indicate the appropriate
number of zeros required to fill the undefined fields.
Table 96: IPv6 Source Guard Commands
Command Function Mode
ipv6 source-guard binding Adds a static address to the source-guard binding
table
GC
ipv6 source-guard Configures the switch to filter inbound traffic based
on source IP address
IC
ipv6 source-guard
max-binding
Sets the maximum number of entries that can be
bound to an interface
IC
show ipv6 source-guard Shows whether source guard is enabled or disabled
on each interface
PE
show ipv6 source-guard
binding
Shows the source guard binding table PE
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