Ip Filtering Configuration Example - H3C S5600 SERIES Operation Manual

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Network diagram

Figure 4-6 Network diagram for DHCP-snooping Option 82 support configuration

Configuration procedure

# Enable DHCP snooping on the switch.

<Switch> system-view

[Switch] dhcp-snooping

# Specify GigabitEthernet 1/0/5 as the trusted port.

[Switch] interface GigabitEthernet1/0/5

[Switch-GigabitEthernet1/0/5] dhcp-snooping trust

[Switch-GigabitEthernet1/0/5] quit

# Enable DHCP-snooping Option 82 support.

[Switch] dhcp-snooping information enable

# Set the remote ID sub-option in Option 82 to the system name (sysname) of the DHCP snooping

[Switch] dhcp-snooping information remote-id sysname

# Set the circuit ID sub-option in DHCP packets from VLAN 1 to abcd on GigabitEthernet 1/0/3.

[Switch] interface GigabitEthernet1/0/3

[Switch-GigabitEthernet1/0/3] dhcp-snooping information vlan 1 circuit-id string abcd

IP Filtering Configuration Example

Network requirements

and GigabitEthernet 1/0/2 is connected to Host A. The IP address and MAC address of Host A are

1.1.1.1 and 0001-0001-0001 respectively. GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 are

connected to DHCP Client B and Client C.

Enable DHCP snooping on the switch, and specify GigabitEthernet 1/0/1 as the DHCP snooping

trusted port.

4-7, GigabitEthernet 1/0/1 of the S5600 switch is connected to the DHCP server

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