Cisco Small Business RV320, Руководство администратора

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DHCP
DHCP Setup
46 Cisco RV320/RV325 Administration Guide
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DHCP Setup
DHCP Setup configures DHCP for IPv4 or IPv6. It also allows some devices to
download their configuration from a TFTP server. When a device starts, if it does
not have both the IP address and TFTP server IP address pre configured, it sends
a request with Option 66, 67, and 150 to the DHCP server to obtain this information.
DHCP Option 150 is Cisco proprietary. The IEEE standard that similar to this
requirement is Option 66. Like Option 150, Option 66 is used to specify the Name
of the TFTP server. Option 67 provides the boot file name.
Option 82 (DHCP relay agent information option) enables a DHCP relay agent to
include information about itself when forwarding client-originated DHCP packets
to a DHCP server. The DHCP server can use this information to implement IP
addressing or other parameter-assignment policies.
To set up DHCP IPv4, click the IPv4 tab. To set up DHCP IPv6, click the IPv6 tab.
Configuring DHCP for IPv4
To configure DHCP for IPv4:
STEP 1
Choose VLAN or Option 82 .
STEP 2
If you choose Option 82 , add circuit IDs by using DHCP > Option 82 . Those circuit
IDs are then listed in the Circuit ID drop-down menu.
If you choose VLAN , select the VLAN from the VLAN ID menu and enter:
• Device IP Address —Management IP address.
• Subnet Mask —Management IP subnetwork mask.
STEP 3
Select the DHCP Mode :
• Disable —Disables DHCP on this device. There are no additional parameters
to complete.
• DHCP Server —Communicates the client DHCP requests to the device
DHCP server.
• DHCP Relay —Passes DHCP requests and replies from another DHCP
server through the device. If DHCP Relay is chosen, enter the Remote DHCP
Server IP address.