H3C S3100 8C SI User Manual

Operation Manual – DHCP
H3C S3100 Series Ethernet Switches Chapter 2 DHCP Snooping Configuration
2-5
Handling
policy
Sub-option
configuration
The DHCP Snooping device will…
Neither of the two
sub-options is
configured
Forward the packet after replacing the original
Option 82 with the default content.
The storage format of Option 82 content is the
one specified with the dhcp-snooping
information format command or the default
HEX format if this command is not executed.
Circuit ID
sub-option is
configured
Forward the packet after replacing the circuit
ID sub-option of the original Option 82 with
the configured circuit ID sub-option in ASCII
format.
Replace
Remote ID
sub-option is
configured
Forward the packet after replacing the remote
ID sub-option of the original Option 82 with
the configured remote ID sub-option in ASCII
format.
When receiving a DHCP client’s request without Option 82, the DHCP snooping device
will add the option field with the configured sub-option and then forward the packet. For
details, see
Table 2-2.
Table 2-2 Ways of handling a DHCP packet without Option 82
Sub-option
configuration
The DHCP-Snooping device will …
Neither of the two
sub-options is
configured.
Forward the packet after adding Option 82 with the default
contents.
The format of Option 82 is the one specified with the
dhcp-snooping information format command or the
default HEX format if this command is not executed.
Circuit ID sub-option is
configured.
Forward the packet after adding Option 82 with the
configured circuit ID sub-option in ASCII format.
Remote ID sub-option
is configured.
Forward the packet after adding Option 82 with the
configured remote ID sub-option in ASCII format.
 Note:
The circuit ID and remote ID sub-options in Option 82, which can be configured
simultaneously or separately, are independent of each other in terms of configuration
sequence.
When the DHCP snooping device receives a DHCP response packet from the DHCP
server, the DHCP snooping device will delete the Option 82 field, if contained, before

H3C S3100 8C SI Specifications

General

Brand	H3C
Model	S3100 8C SI
Category	Switch
Language	English