HP 6125G Configuration Manual page 66

On GigabitEthernet 1/0/2, configure the padding content for the circuit ID sub-option as
•
company001 and for the remote ID sub-option as device001.
On GigabitEthernet 1/0/3, configure the padding format as verbose, access node identifier as
•
sysname, and code type as ascii for Option 82.
Switch forwards DHCP requests to the DHCP server after replacing Option 82 in the requests, so
•
that the DHCP clients can obtain IP addresses.
Configuration procedure
# Enable DHCP snooping.
<Switch> system-view
[Switch] dhcp-snooping
# Specify GigabitEthernet 1/0/1 as trusted.
[Switch] interface GigabitEthernet 1/0/1
[Switch-GigabitEthernet1/0/1] dhcp-snooping trust
[Switch-GigabitEthernet1/0/1] quit
# Configure GigabitEthernet 1/0/2 to support Option 82.
[Switch] interface GigabitEthernet 1/0/2
[Switch-GigabitEthernet1/0/2] dhcp-snooping information enable
[Switch-GigabitEthernet1/0/2] dhcp-snooping information strategy replace
[Switch-GigabitEthernet1/0/2] dhcp-snooping information circuit-id string company001
[Switch-GigabitEthernet1/0/2] dhcp-snooping information remote-id string device001
[Switch-GigabitEthernet1/0/2] quit
# Configure GigabitEthernet 1/0/3 to support Option 82.
[Switch] interface GigabitEthernet 1/0/3
[Switch-GigabitEthernet1/0/3] dhcp-snooping information enable
[Switch-GigabitEthernet1/0/3] dhcp-snooping information strategy replace
[Switch-GigabitEthernet1/0/3] dhcp-snooping information format verbose node-identifier
sysname
[Switch-GigabitEthernet1/0/3] dhcp-snooping information circuit-id format-type ascii
[Switch-GigabitEthernet1/0/3] dhcp-snooping information remote-id format-type ascii
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