Ipv6 Source-Guard - Edge-Core ES3528MV2 Management Manual

| General Security Measures
C 25
HAPTER
IPv6 Source Guard

ipv6 source-guard

R C
ELATED OMMANDS
ipv6 source-guard (928)
ipv6 dhcp snooping (911)
ipv6 dhcp snooping vlan (915)
This command configures the switch to filter inbound traffic based on the
source IP address stored in the binding table. Use the no form to disable
this function.
S
YNTAX
ipv6 source-guard sip
no ipv6 source-guard
D S
EFAULT ETTING
Disabled
C M
OMMAND ODE
Interface Configuration (Ethernet)
C U
OMMAND SAGE
Source guard is used to filter traffic on an insecure port which receives
◆
messages from outside the network or fire wall, and therefore may be
subject to traffic attacks caused by a host trying to use the IP address
of a neighbor.
This command checks the VLAN ID, IPv6 global unicast source IP
◆
address, and port number against all entries in the binding table. Use
the no ipv6 source guard command to disable this function on the
selected port.
After IPv6 source guard is enabled on an interface, the switch initially
◆
blocks all IPv6 traffic received on that interface, except for ND packets
allowed by ND snooping and DHCPv6 packets allowed by DHCPv6
snooping. A port access control list (ACL) is applied to the interface.
Traffic is then filtered based upon dynamic entries learned via ND
snooping or DHCPv6 snooping, or static addresses configured in the
source guard binding table. The port allows only IPv6 traffic with a
matching entry in the binding table and denies all other IPv6 traffic.
◆ Table entries include a MAC address, IPv6 global unicast address, entry
type (Static-IPv6-SG-Binding, Dynamic-ND-Binding, Dynamic-DHCPv6-
Binding), VLAN identifier, and port identifier.
Static addresses entered in the source guard binding table with the
◆
ipv6 source-guard binding
an infinite lease time. Dynamic entries learned via DHCPv6 snooping
are configured by the DHCPv6 server itself.
If IPv6 source guard is enabled, an inbound packet's source IPv6
◆
address will be checked against the binding table. If no matching entry
is found, the packet will be dropped.
– 928 –
command are automatically configured with