3-3
Parameters
vlan vlan-id: Specifies a VLAN ID, in the range of 1 to 4094.
circuit-id: Padding content for the user-defined circuit ID sub-option, a case-sensitive string of 3 to 63
characters.
Description
Use the dhcp-snooping information circuit-id string command to configure the padding content for
the user-defined circuit ID sub-option.
Use the undo dhcp-snooping information circuit-id string command to restore the default.
By default, the padding content for the circuit ID sub-option depends on the padding format of Option
82.
Note that:
z After you configure the padding content for the circuit ID sub-option using this command, ASCII is
adopted as the code type.
z If a VLAN is specified, the configured circuit ID sub-option only takes effect within the VLAN; if no
VLAN is specified, the configured circuit ID sub-option takes effect in all VLANs. The former case
has a higher priority; that is, the circuit ID sub-option specified for a VLAN will be padded for
packets within the VLAN.
Related commands: dhcp-snooping information format, display dhcp-snooping information.
Examples
# Configure the global padding content for the user-defined circuit ID sub-option as company001.
<Sysname> system-view
[Sysname] interface GigabitEthernet 1/0/1
[Sysname-GigabitEthernet1/0/1] dhcp-snooping information circuit-id string company001
dhcp-snooping information enable
Syntax
dhcp-snooping information enable
undo dhcp-snooping information enable
View
Layer 2 Ethernet interface view, Layer 2 aggregation interface view
Default Level
2: System level
Parameters
None
Description
Use the dhcp-snooping information enable command to configure DHCP snooping to support Option
82.
Use the undo dhcp-snooping information enable command to disable this function.
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