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DHCP Server

You can disable or enable the DHCP (Dynamic Host Configuration Protocol) server or enable the

router’s DHCP relay functions. The DHCP protocol allows your router to dynamically assign IP

addresses to PCs on your network if they are configured to obtain IP addresses automatically.

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Disable

Disable the DHCP Server function.

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Enable

Enable the DHCP function, enter the information wanted. Here as default.

Start IP Address:

the start IP address of the range the DHCP Server used to assign to the Clients.

End IP Address:

the end IP address f the range the DHCP Server used to assign to the Clients.

Leased Time:

the leased time for each DHCP Client.

Maximum Leased Time(hour):

the Maximum Leased Time(hour).

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DHCP Server Relay

If you check

DHCP Relay

and then you must enter the IP address of the DHCP server which

assigns an IP address back to the DHCP client in the LAN. Use this function only if advised to do so

by your network administrator or ISP.

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Static IP List

The specified IP will be assigned to the corresponding MAC Address listed in the following table

when DHCP Server assign IP Addresses to Clients.

Press

Add

to the Static IP List.

Enter the MAC Address, IP Address and Host Name, then click Apply to confirm your settings.

IP Alias

This function allows the creation of multiple virtual IP interfaces on this router. It helps to connect two

or more local networks to the ISP or remote node.

IP Alias:

check whether to enable this function.

IP Address:

Specify an IP address on this virtual interface.

Netmask:

Specify a subnet mask on this virtual interface.

Click

Apply

to apply your settings.

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IPv6 Autoconfig

The IPv6 address composes of two parts, thus, the prefix and the interface ID.

There are two ways to dynamically configure IPv6 address on hosts. One is statefull configuration,

for example using DHCPv6 (which resembles its counterpart DHCP in IPv4.) In the stateful

autoconfiguration model, hosts obtain interface addresses and/or configuration information and

parameters from a DHCPv6 server. The Server maintains a database that keeps track of which

addresses have been assigned to which hosts.

The second way is stateless configuration. Stateless auto-configuration requires no manual

configuration of hosts, minimal (if any) configuration of routers, and no additional servers. The

stateless mechanism allows a host to generate its own addresses using a combination of locally

available information (MAC address) and information (prefix) advertised by routers. Routers

advertise prefixes that identify the subnet(s) associated with a link, while hosts generate an

"interface identifier" that uniquely identifies an interface on a subnet. An address is formed by

combining the two. When using stateless configuration, you needn’t configure anything on the client.

Static LAN IPv6 Address Configuration

Interface Address / Prefix Length:

enter the static LAN IPv6 address.

IPv6 LAN application

DHCPv6 Server:

check whether to enable DHCPv6 server.

DHCPv6 Server Type:

select Stateless or Stateful. When DHCPv6 is enabled, this parameter is

available.

Stateless:

if selected, the PCs in LAN are configured through RA mode, thus,

the PCs in

LAN are configured through RA mode, to obtain the prefix message and generate an address using

a combination of locally available information (MAC address) and information (prefix) advertised by

routers, but they can obtain such information like DNS from DHCPv6 Server.

Stateful:

if selected,

the PCs in LAN will be configured like in IPv4 mode, thus obtain addresses and DNS information

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from DHCPv6 server.

Start interface ID:

enter the start interface ID. The IPv6 address composed of two parts, thus, the

prefix and the interface ID. Interface is like the Host ID compared to IPv4.

End interface ID:

enter the end interface ID.

Note: Interface ID does NOT support ZERO COMPRESSION "::". Please enter the complete

information.

For example: Please enter "0:0:0:2" instead of "::2".

Leased Time (hour):

the leased time, similar to leased time in DHCPv4, is a time limit assigned to

clients, when expires, the assigned ID will be recycled and reassigned.

Issue Router Advertisement:

check whether to enable issue Router Advertisement feature. It is to

send Router Advertisement messages periodically.

MLD snooping:

similar to IGMP snooping, listens in on the MLD conversation between hosts and

routers by processing MLD packets sent in a multicast network, and it analyzes all MLD packets

between hosts and the connected multicast routers in the network. Without MLD snooping, multicast

traffic is treated in the same manner as broadcast traffic - that is, it is forwarded to all ports. With

MLD snooping, multicast traffic of a group is only forwarded to ports that have members of that

group.

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Standard Mode:

In standard mode, multicast traffic will flood to all bridge ports when no

client subscribes to a multicast group.

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Blocking Mode:

In blocking mode, the multicast data will be blocked when there is no

client subscribes to a multicast group, it won’t flood to the bridge ports.

Stateless and Stateful IPv6 address Configuration

Stateless:

two methods can be adopted.

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With DHCPv6 disabled, but Issue Router Advertisement Enabled

With this method,

the PCs in LAN are configured through RA mode, thus,

the PCs in LAN are

configured through RA mode, to obtain the prefix message and generate an address using a

combination of locally available information (MAC address) and information (prefix) advertised by

routers.

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With both DHCPv6 and Issue Router Advertisement Enabled

With this method, the PCs’ addresses in LAN are configured like above method, but they can

obtain such information like DNS from DHCPv6 Server.

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Stateful:

two methods can be adopted.

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With only DHCPv6 enabled

With this method, the PCs’ addresses are configured the same as in IPv4, that is addresses are

assigned by DHCPv6 server.

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With both DHCPv6 and Issue Router Advertisement Enabled

With this method, the PCs’ addresses are configured the same like above, and the address

information in RA packets will be neglected.