R0106-HP MSR Router Series Layer 3 - IP Services Command Reference(V7)

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• user-defined node-identifier: Uses a case-sensitive string of 1 to 50 characters as the node identifier.
The padding format for the specified character string is always ASCII regardless of the specified
padding format.
format: Specifies the code type for the Circuit ID sub-option.
ascii: Specifies the ASCII code type.
hex: Specifies the hex code type.
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 use this command multiple times, the most recent configuration takes effect.
The padding format for the user-defined string, the normal mode, or the verbose modes varies by
command configuration. Table 16 sho
ws how the padding format is determined for different modes.
Table 16 Padding format for different modes
Keyword (mode)
If no padding format
is s
p
ecified
If the padding
format is ascii
The padding format is hex
string circuit-id
You cannot specify a
padding format, and the
padding format is
always ASCII.
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.
If replace is configured as the handling strategy for DHCP requests that contain Option 82, you must
specify the padding content and code type for the Circuit ID sub-option. If the handling strategy is keep
or drop, you do not need to specify the padding content and code type for the Circuit ID sub-option.
Examples
# Configure verbose as the padding format, device name as the node identifier, and ASCII as the code
type for the Circuit ID sub-option.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/1/1
[Sysname-GigabitEthernet2/1/1] dhcp snooping information enable
[Sysname-GigabitEthernet2/1/1] dhcp snooping information strategy replace
[Sysname-GigabitEthernet2/1/1] 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