Operation Manual – DHCP
H3C S3100 Series Ethernet Switches Chapter 2 DHCP Snooping Configuration
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table or static binding table, the switch regards the packet as a valid packet and
forwards it; otherwise, the switch drops it directly.
2.2 DHCP Snooping Configuration
2.2.1 Configuring DHCP Snooping
Table 2-3 Configure DHCP snooping
Operation Command Description
Enter system view
system-view
—
Enable DHCP
snooping
dhcp-snooping
Required
By default, the DHCP snooping
function is disabled.
Note:
z After DHCP snooping is enabled on an S3100 Ethernet switch, clients connected
with this switch cannot obtain IP addresses dynamically through BOOTP.
z You are not recommended to configure both the DHCP snooping and selective
Q-in-Q function on an S3100-EI switch, which may result in the DHCP snooping to
function abnormally.
2.2.2 Configuring DHCP Snooping Trusted/Untrusted Ports
Table 2-4 Configure DHCP Snooping Trusted/Untrusted Ports
Operation Command Description
Enter system view
system-view
—
Enter Ethernet port
view
interface interface-type
interface-number
—
Specify the current
port as a trusted port
dhcp-snooping trust
Required
By default, after DHCP snooping
is enabled, all ports of the
S3100-EI switch are untrusted
ports.
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