H3C S5600 Series Operation Manual page 782

Operation Manual – DHCP
H3C S5600 Series Ethernet Switches
Table 4-1 Ways of handling a DHCP packet with Option 82
Handling policy
Drop
Keep
Replace
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 4-2 Ways of handling a DHCP packet without Option 82
Sub-option configuration
Neither of the two sub-options is
configured.
Circuit ID sub-option is configured.
Remote ID sub-option is
configured.
Sub-option
configuration
—
—
Neither of the two
sub-options is
configured
Circuit ID sub-option is
configured
Remote ID sub-option
is configured
Table 4-2.
Chapter 4 DHCP Snooping Configuration
The DHCP Snooping device will...
Drop the packet.
Forward the packet without
changing Option 82.
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.
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.
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.
The DHCP-Snooping device will ...
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.
Forward the packet after adding Option 82
with the configured circuit ID sub-option in
ASCII format.
Forward the packet after adding Option 82
with the configured remote ID sub-option in
ASCII format.
4-4