Chapter 24: General Security Measures
IPv4 Source Guard
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Console(config)#ip source-guard binding 11-22-33-44-55-66 vlan 1 192.168.0.99
interface ethernet 1/5
Console(config-if)#
R
ELATED
C
OMMANDS
ip source-guard
This command configures the switch to filter inbound traffic based on
source IP address, or source IP address and corresponding MAC address.
Use the
no
form to disable this function.
S
YNTAX
ip source-guard
{
sip
|
sip-mac
}
no
ip source-guard
sip
- Filters traffic based on IP addresses stored in the binding
table.
sip-mac
- Filters traffic based on IP addresses and corresponding
MAC addresses stored in the binding table.
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (Ethernet)
C
OMMAND
U
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.
•
Setting source guard mode to “sip” or “sip-mac” enables this function
on the selected port. Use the “sip” option to check the VLAN ID, source
IP address, and port number against all entries in the binding table.
Use the “sip-mac” option to check these same parameters, plus the
source MAC address. Use the
no ip source guard
command to disable
this function on the selected port.
•
When enabled, traffic is filtered based upon dynamic entries learned via
DHCP snooping, or static addresses configured in the source guard
binding table.
•
Table entries include a MAC address, IP address, lease time, entry type
(Static-IP-SG-Binding, Dynamic-DHCP-Binding, VLAN identifier, and
port identifier.
Summary of Contents for SSE-G2252
Page 42: ...44 General IP Routing on page 627...
Page 603: ...Chapter 16 IP Configuration Setting the Switch s IP Address IP Version 6 609...
Page 883: ...Chapter 24 General Security Measures Port based Traffic Segmentation 894...
Page 989: ...Chapter 30 Congestion Control Commands Automatic Traffic Control Commands 1000 Console...
Page 1007: ...Chapter 33 Address Table Commands 1019...
Page 1137: ...Chapter 38 Quality of Service Commands 1150...