Configuring Dhcp Option 82 - H3C S3100 Series Operation Manual

H3c s3100 series ethernet switches operation manual

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[SwitchA] interface GigabitEthernet 1/1/1

[SwitchA-GigabitEthernet1/1/1] port link-type trunk

[SwitchA-GigabitEthernet1/1/1] port trunk permit vlan 1001 2001

Configuring DHCP Option 82

# Enable DHCP snooping on Switch A, and configure GigabitEthernet 1/1/1 as a trusted port.

[Sysname] dhcp-snooping

[Sysname] interface GigabitEthernet 1/1/1

[Sysname-GigabitEthernet1/1/1] dhcp-snooping trust

[Sysname-GigabitEthernet1/1/1] quit

# Configure DHCP snooping to support option 82 on Switch A.

[Sysname] dhcp-snooping information enable

You can configure option 82 in other ways. For more information, see DHCP Configuration.

# Configure Switch A to add Option 82 carrying the original VLAN information to the DHCP requests.

[Sysname] dhcp-snooping information ignore-vlanmapping

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