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Usage guidelines
The Circuit ID sub-option cannot carry information about interface splitting or subinterfaces. For
more information about interface splitting and subinterfaces, see Interface Configuration Guide.
If you execute this command multiple times, the most recent configuration takes effect.
The padding format for the string mode, the normal mode, or the verbose mode varies by command
configuration. Table 18 sh
ows how the padding format is determined for different modes.
Table 18 Padding format for different modes
Keyword (mode)
If no padding format is
set
If the padding
format is ascii
If the padding format
is hex
string
circuit-id
The padding format is always
ASCII, and is not
configurable.
N/A N/A
normal
Hex. ASCII. Hex.
verbose
Hex for the VLAN ID.
ASCII for the node identifier,
Ethernet type, chassis
number, slot number, sub-slot
number, and interface
number.
ASCII.
ASCII for the node
identifier and Ethernet
type.
Hex for the chassis
number, slot number,
sub-slot number, interface
number, and VLAN ID.
Examples
# Configure verbose as the padding mode, device name as the node identifier, and ASCII as the
padding format for the Circuit ID sub-option.
<Sysname> system-view
[Sysname] interface hundredgige 1/0/1
[Sysname-HundredGigE1/0/1] dhcp snooping information enable
[Sysname-HundredGigE1/0/1] dhcp snooping information strategy replace
[Sysname-HundredGigE1/0/1] dhcp snooping information circuit-id verbose node-identifier
sysname format ascii
Related commands
dhcp snooping information enable
dhcp snooping information strategy
display dhcp snooping information
dhcp snooping information enable
Use dhcp snooping information enable to enable DHCP snooping to support Option 82.
Use undo dhcp snooping information enable to disable this feature.
Syntax
dhcp snooping information enable
undo dhcp snooping information enable
Default
DHCP snooping does not support Option 82.
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