3Com S7902E Command Reference Manual - page 564
4-8
Parameters
no-user-binding
: Specifies the port not to record the clients’ IP-to-MAC bindings in DHCP requests it
receives. The command without this keyword records the IP-to-MAC bindings of clients.
Description
Use the
dhcp-snooping trust
command to configure a port as a trusted port.
Use the
undo dhcp-snooping trust
command to restore the default state of a port.
All ports are untrusted by default.
Related commands:
display dhcp-snooping trust
.
Examples
# Specify GigabitEthernet 2/0/1 as a trusted port and enable it to record the IP-to-MAC bindings of
clients.
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] dhcp-snooping trust
display dhcp-snooping
Syntax
display dhcp-snooping
[
ip ip-address
]
View
Any view
Default Level
1: Monitor level
Parameters
ip
ip-address
: Displays the DHCP snooping IP-to-MAC binding corresponding to the specified IP
address.
Description
Use the
display dhcp-snooping
command to display the IP-to-MAC bindings recorded by the DHCP
snooping device.
Related commands:
dhcp-snooping
.
Using the
display dhcp-snooping
command displays IP-to-MAC bindings that are present both in the
DHCP-ACK and DHCP-REQUEST messages.