User's Manual

335
Command Operation
dhcp snooping information
vendor-specific string
STRING
If option82 is set to be in the manual format, you need to
set DHCP-snooping to forward DHCP packets with
bearing of option82, whose content is the character string
written by STRING. This command is set on the port that
connects the client.
dhcp snooping information
vendor-specific hex [xx-xx-
xx-xx-xx-xx]
If option82 is set to be in the manual format, you need to
set DHCP-snooping to forward DHCP packets with
bearing of option82, whose content is the Hex system..
This command is set on the port that connects the client.
no dhcp snooping
information vendor-specific
Deletes the manually configured option82 vendor-
specific.
44.1.11 Setting the Policy of DHCP Snooping Option82 Packets
You can set the policy for the DHCP request packets, which carry with option82, after these packets are
received. The policies include the following ones:
“Drop” policy: Run the following commands in the port mode to drop the request packets with option82.
Command Operation
dhcp snooping information
drop
Drops the request packets that contain option82.
“Append” policy: Run the following command in port mode to add the request packets with option82.
Command Operation
dhcp snooping information
append
Enables the function to add option82 on a port.
dhcp snooping information
append first-subop9-param
{ hex xx-xx-xx-xx-xx-xx |
vlanip | hostname }
Stands for the first parameter carried by option82 vendor-
specific (suboption9).
dhcp snooping information
append second-subop9-
param { hex xx-xx-xx-xx-xx-
xx | vlanip | hostname }
Stands for the second parameter carried by option82
vendor-specific (suboption9).
44.1.12 Setting the TFTP Server for Backing Up Interface Binding
After the switch configuration is rebooted, the previously-configured interface binding will be lost. In this case,