Dynamic Ipv4 Source Guard Using Dhcp Relay Configuration Example - HP 5500 HI Series Configuration Manual

# Enable DHCP snooping.
<Device> system-view
[Device] dhcp-snooping
# Configure port GigabitEthernet 1/0/2, which is connected to the DHCP server, as a trusted
port.
[Device] interface gigabitethernet1/0/2
[Device-GigabitEthernet1/0/2] dhcp-snooping trust
[Device-GigabitEthernet1/0/2] quit
2. Configure the IPv4 source guard function.
# Configure the IPv4 source guard function on port GigabitEthernet 1/0/1 to filter packets based
on both the source IP address and MAC address.
[Device] interface gigabitethernet1/0/1
[Device-GigabitEthernet1/0/1] ip verify source ip-address mac-address
[Device-GigabitEthernet1/0/1] quit
Verifying the configuration
# Display the IPv4 source guard entries generated on port GigabitEthernet 1/0/1.
[Device] display ip source binding
Total entries found: 1
MAC Address
0001-0203-0406
# Display DHCP snooping entries to see whether they are consistent with the dynamic entries generated
on GigabitEthernet 1/0/1.
[Device] display dhcp-snooping
DHCP snooping is enabled.
The client binding table for all untrusted ports.
Type : D--Dynamic , S--Static , R--Recovering
Type IP Address
==== =============== ============== ============ ==== ===== =================
D 192.168.0.1
--- 1 dhcp-snooping item(s) found
The output shows that a dynamic IPv4 source guard entry has been generated based on the DHCP
snooping entry.
Dynamic IPv4 source guard using DHCP relay configuration
example
Network requirements
As shown in
VLAN-interface 100 and VLAN-interface 200 respectively. DHCP relay is enabled on the switch. The host
(with the MAC address of 0001-0203-0406) obtains an IP address from the DHCP server through the
DHCP relay agent.
Enable the IPv4 source guard function on the switch's VLAN-interface 100 to filter packets based on the
DHCP relay entry, allowing only packets from clients that obtain IP addresses from the DHCP server to
pass.
IP Address
192.168.0.1
MAC Address
0001-0203-0406 86335
Figure 1 12, the host and the DHCP server are connected to the switch through interfaces
VLAN Interface
1 GE1/0/1
Lease VLAN SVLAN Interface
1
---
362
Type
DHCP-SNP
N/A GigabitEthernet1/0/1