Dhcp Snooping Configuration Examples; Dhcp Snooping Configuration Example - H3C S5120-SI Series Operation Manual

Clear DHCP snooping entries
Clear DHCP packet statistics on the
DHCP snooping device

DHCP Snooping Configuration Examples

DHCP Snooping Configuration Example

Network requirements
As shown in Figure
two DHCP clients through GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3. GigabitEthernet 1/0/1
forwards DHCP server responses while the other two do not.
Switch A records clients' IP-to-MAC address bindings in DHCP-REQUEST messages and DHCP-ACK
messages received from trusted ports.
Figure 3-3 Network diagram for DHCP snooping configuration
Configuration procedure
# Enable DHCP snooping.
<SwitchA> system-view
[SwitchA] dhcp-snooping
# Specify GigabitEthernet1/0/1 as trusted.
[SwitchA] interface GigabitEthernet 1/0/1
[SwitchA-GigabitEthernet1/0/1] dhcp-snooping trust
[SwitchA-GigabitEthernet1/0/1] quit
DHCP Snooping Option 82 Support Configuration Example
Network requirements
As shown in
Configure the handling strategy for DHCP requests containing Option 82 as replace.
To do...
3-3, Switch A is connected to a DHCP server through GigabitEthernet 1/0/1, and to
Figure 3-3, enable DHCP snooping and Option 82 support on Switch A.
Use the command...
reset dhcp-snooping { all | ip
ip-address }
reset dhcp-snooping packet
statistics
3-7
Remarks
Available in user view
Available in user view