Configuration procedure – H3C Technologies H3C S12500 Series Switches User Manual

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format as verbose, access node identifier as sysname, and code type as ascii for Option 82. Switch B

forwards DHCP requests to the DHCP server (Switch A) after replacing Option 82 in the requests, so that
the DHCP clients can obtain IP addresses.

Configuration procedure

# Enable DHCP snooping.

system-view

[SwitchB] dhcp-snooping

# Specify GigabitEthernet 3/0/1 as trusted.

[SwitchB] interface GigabitEthernet 3/0/1

[SwitchB-GigabitEthernet3/0/1] dhcp-snooping trust

[SwitchB-GigabitEthernet3/0/1] quit

# Configure GigabitEthernet 3/0/2 to support Option 82.

[SwitchB] interface GigabitEthernet 3/0/2

[SwitchB-GigabitEthernet3/0/2] dhcp-snooping information enable

[SwitchB-GigabitEthernet3/0/2] dhcp-snooping information strategy replace

[SwitchB-GigabitEthernet3/0/2] dhcp-snooping information circuit-id string company001

[SwitchB-GigabitEthernet3/0/2] dhcp-snooping information remote-id string device001

[SwitchB-GigabitEthernet3/0/2] quit

# Configure GigabitEthernet 3/0/3 to support Option 82.

[SwitchB] interface GigabitEthernet 3/0/3

[SwitchB-GigabitEthernet3/0/3] dhcp-snooping information enable

[SwitchB-GigabitEthernet3/0/3] dhcp-snooping information strategy replace

[SwitchB-GigabitEthernet3/0/3] dhcp-snooping information format verbose node-identifier

sysname

[SwitchB-GigabitEthernet3/0/3] dhcp-snooping information circuit-id format-type ascii

[SwitchB-GigabitEthernet3/0/3] dhcp-snooping information remote-id format-type ascii

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