Manual

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Москва, Новозаводская ул., 18, стр. 1
268
DHCP Snooping Typical Application
ip dhcp snooping information option
self-defined remote-id format [ascii |
hex]
Set self-defined format of remote-id for snooping
option82.
ip dhcp snooping information option
self-defined subscriber-id {vlan | port
| id (switch-id (mac | hostname)|
remote-mac) | string WORD}
no ip dhcp snooping information
option type self-defined subscriber-id
Set creation method for option82, users can define
the parameters of circute-id suboption by
themselves.
ip dhcp snooping information option
self-defined subscriber-id format
[ascii | hex]
Set self-defined format of circuit-id for snooping
option82.
Port mode
ip dhcp snooping information option
subscriber-id {standard | <circuit-id>}
no ip dhcp snooping information
option subscriber-id
Set the suboption1 (circuit ID option) content of
option 82 added by DHCP request packets (they
are received by the port). The no command sets
the additive suboption1 (circuit ID option) format of
option 82 as standard.
Command
Explanation
Globe mode
ip dhcp snooping information option
allow-untrusted (replace|)
no ip dhcp snooping information
option allow-untrusted (replace|)
This command is used to set that allow untrusted
ports of DHCP snooping to receive DHCP packets
with option82 option. When the "replace" is setting,
the potion82 option is allowed to replace. When
disabling this command, all untrusted ports will drop
DHCP packets with option82 option.