86
View
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Default level
2: System level
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.
After enabling DHCP snooping, you need to specify the ports connected to the valid DHCP servers as
trusted to ensure that DHCP clients can obtain valid IP addresses.
Related commands: display dhcp-snooping trust.
Examples
# Specify GigabitEthernet 1/0/1 as a trusted port and enable it to record the IP-to-MAC bindings of
clients.
<Sysname> system-view
[Sysname] interface GigabitEthernet 1/0/1
[Sysname-GigabitEthernet1/0/1] dhcp-snooping trust
display dhcp-snooping
Syntax
display dhcp-snooping [ ip ip-address ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
ip ip-address: Displays the DHCP snooping entries corresponding to the specified IP address.
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see the Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display dhcp-snooping command to display DHCP snooping entries.
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