Dynamic Ipv4 Source Guard Using Dhcp Snooping Configuration Example - H3C S5500-EI Series Security Configuration Manual

# Configure the IPv4 source guard function on GigabitEthernet 1/0/2 to filter packets based on
both the source IP address and MAC address.
<DeviceB> system-view
[DeviceB] interface gigabitethernet 1/0/2
[DeviceB-GigabitEthernet1/0/2] ip verify source ip-address mac-address
# Configure GigabitEthernet 1/0/2 to allow only IP packets with the source MAC address of
0001-0203-0406 and the source IP address of 192.168.0.1 to pass.
[DeviceB] interface gigabitethernet 1/0/2
[DeviceB-GigabitEthernet1/0/2] ip source binding ip-address 192.168.0.1 mac-address
0001-0203-0406
[DeviceB-GigabitEthernet1/0/2] quit
# Configure the IPv4 source guard function on GigabitEthernet 1/0/1 to filter packets based on
the source IP address.
[DeviceB] interface gigabitethernet 1/0/1
[DeviceB-GigabitEthernet1/0/1] ip verify source ip-address
# Configure GigabitEthernet 1/0/1 to allow only IP packets with the source IP address of
192.168.0.2 to pass.
[DeviceB-GigabitEthernet1/0/1] ip source binding ip-address 192.168.0.2
[DeviceB-GigabitEthernet1/0/1] quit
Verifying the configuration
# On Device A, display information about static IPv4 source guard entries. The output shows that the
static IPv4 source guard entries are configured successfully.
[DeviceA] display ip source binding static
Total entries found: 2
MAC Address
0001-0203-0405
0001-0203-0406
# On Device B, display information about static IPv4 source guard entries. The output shows that the
static IPv4 source guard entries are configured successfully.
[DeviceB] display ip source binding static
Total entries found: 2
MAC Address
0001-0203-0406
N/A
Dynamic IPv4 source guard using DHCP snooping
configuration example
Network requirements
As shown in
GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 respectively. The host obtains an IP address from the
DHCP server.
Enable DHCP snooping on the device to record the DHCP snooping entry of the host. Enable the IPv4
source guard function on the device's port GigabitEthernet 1/0/1 to filter packets based on the DHCP
snooping entry, allowing only packets from clients that obtain IP addresses through the DHCP server to
pass.
IP Address
192.168.0.3
192.168.0.1
IP Address
192.168.0.1
192.168.0.2
Figure 125, the device connects to the host (client) and the DHCP server through ports
VLAN Interface
N/A GE1/0/2
N/A GE1/0/1
VLAN Interface
N/A GE1/0/2
N/A GE1/0/1
373
Type
Static
Static
Type
Static
Static