33
DHCP Relay Agent:
The DHCP Relay Agent
is also known as DHCP Option 82. It can help
relay the DHCP Request to remote DHCP
server located in different subnet.
Note:
The DHCP Server cannot work with
DHCP Relay Agent at the same time.
Relay Agent:
Choose Enable or Disable the
relay agent.
Relay Policy:
The Relay Policy is used when
the DHCP request is relayed through more
than one switch. The switch can drop, keep or
replace the MAC address of the DHCP
Request packet.
Helper Address:
Type the IP address of the
target DHCP Server. There are 4 available IP
addresses.
DHCP Option82:
You can configure the DHCP Option82 setting of the Relay Agent.
Choose
‘Default’ or you can input any string for Circuit-ID and Remote-ID. By default,
Circuit-ID is the combination of VLAN-ID/Port number, Remote-ID is the MAC address of
Relay Agent.
4.2.7
Backup and Restore
With Backup command, you can save current configuration file saved in the switch’s flash to
admin PC or TFTP server. This will allow you to go to
Restore
command later to restore the
configuration file back to the switch. Before you restore the configuration file, you must place
the backup configuration file in the PC or TFTP server. The switch will then download this
file back to the flash.
There are 2 modes for users to backup/restore the configuration file, the Local File mode,
and TFTP Server mode.
Local File
mode: In this mode, the switch acts as the file server. Users can browse the
target folder and then type the file name to backup the configuration. Users can also browse
the target folder and select existed configuration file to restore the configuration back to the
switch. This mode is only provided by Web UI while CLI is not supported.
TFTP Server
mode: In this mode, the switch acts as TFTP client. Before you do so, make
sure that your TFTP server is ready. Then please type the IP address of TFTP Server and
Backup configuration file name. This mode can be used in both CLI and Web UI.
TFTP Server IP Address
: You need to key in the IP address of your TFTP Server here.
Backup/Restore File Name
: Please type the correct file name of the configuration file..
Configuration File:
The configuration file of the switch is a pure text file. You can open it by
word/txt read file. You can also modify the file, add/remove the configuration settings, and
then restore back to the switch.
Startup Configuration File:
After you saved the running-config to flash, the new settings
will be kept and work after power cycle. You can use
show startup-config
to view it in CLI.
The Backup command can only backup such configuration file to your PC or TFTP server.
To activate the configuration after power reboot,
“Save to Flash” is a Must command
.
Please check the description in Ch4.14
