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Page 121 / 327 Scroll up to view Page 116 - 120
Chapter 8 Home Networking
VMG3926-B10A User’s Guide
121
•
Assigning lease times to mappings
Windows Messenger is an example of an application that supports NAT traversal and UPnP.
See the
Chapter 11 on page 159
for more information on NAT.
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own services and opening
firewall ports may present network security issues. Network information and configuration may also
be obtained and modified by users in some network environments.
When a UPnP device joins a network, it announces its presence with a multicast message. For
security reasons, the VMG allows multicast messages on the LAN only.
All UPnP-enabled devices may communicate freely with each other without additional configuration.
Disable UPnP if this is not your intention.
UPnP and ZyXEL
ZyXEL has achieved UPnP certification from the Universal Plug and Play Forum UPnP™
Implementers Corp. (UIC). ZyXEL's UPnP implementation supports Internet Gateway Device (IGD)
1.0.
See
Section 8.4.1 on page 127
for examples of installing and using UPnP.
Finding Out More
See
Section 8.9 on page 131
for technical background information on LANs.
8.1.3
Before You Begin
Find out the MAC addresses of your network devices if you intend to add them to the DHCP Client
List screen.
8.2
The LAN Setup Screen
Use this screen to set the Local Area Network IP address and subnet mask of your VMG. Click
Network Setting > Home Networking
to open the
LAN Setup
screen.
Follow these steps to configure your LAN settings.
1
Enter an IP address into the
IP Address
field. The IP address must be in dotted decimal notation.
This will become the IP address of your VMG.
2
Enter the IP subnet mask into the
IP Subnet Mask
field. Unless instructed otherwise it is best to
leave this alone, the configurator will automatically compute a subnet mask based upon the IP
address you entered.
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Chapter 8 Home Networking
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122
3
Click
Apply
to save your settings.
Figure 50
Network Setting > Home Networking > LAN Setup
The following table describes the fields in this screen.
Table 29
Network Setting > Home Networking > LAN Setup
LABEL
DESCRIPTION
Interface Group
Group Name
Select the interface group name for which you want to configure LAN settings. See
Chapter
14 on page 181
for how to create a new interface group.
LAN IP Setup
IPv4 Address
Enter the LAN IPv4 IP address you want to assign to your VMG in dotted decimal notation,
for example, 192.168.1.1 (factory default).
Subnet Mask/
Prefix Length
Type the subnet mask of your network in dotted decimal notation, for example
255.255.255.0 (factory default). Your VMG automatically computes the subnet mask based
on the IP Address you enter, so do not change this field unless you are instructed to do so.
IGMP Snooping
Status
Select the
Enable IGMP Snooping
checkbox to allows the VMG to passively learn multicast
group.
Page 123 / 327
Chapter 8 Home Networking
VMG3926-B10A User’s Guide
123
IGMP Mode
Select
Standard Mode
to have the VMG forward multicast packets to a port that joins the
multicast group and broadcast unknown multicast packets from the WAN to all LAN ports.
Select
Blocking Mode
to have the VMG block all unknown multicast packets from the WAN.
DHCP Server State
DHCP
Select
Enable
to have the VMG act as a DHCP server or DHCP relay agent.
Select
Disable
to stop the DHCP server on the VMG.
Select
DHCP Relay
to have the VMG forward DHCP request to the DHCP server.
DHCP Relay
Server Address
This field is only available when you select
DHCP Relay
in the
DHCP
field.
IPv4 Address
Enter the IPv4 IP address of the actual remote DHCP server in this field.
IP Addressing
Values
This field is only available when you select
Enable
in the
DHCP
field.
Beginning IP
Address
This field specifies the first of the contiguous addresses in the IP address pool.
Ending IP
Address
This field specifies the last of the contiguous addresses in the IP address pool.
Auto reserve IP
for the same
host
Select
Enable
to have the VMG record DHCP IP addresses with the MAC addresses the IP
addresses are assigned to. The VMG assigns the same IP address to the same MAC address
when the host requests an IP address again through DHCP.
DHCP Server
Lease Time
This is the period of time DHCP-assigned addresses is used. DHCP automatically assigns IP
addresses to clients when they log in. DHCP centralizes IP address management on central
computers that run the DHCP server program. DHCP leases addresses, for a period of time,
which means that past addresses are “recycled” and made available for future reassignment
to other systems.
This field is only available when you select
Enable
in the
DHCP
field.
Days/Hours/
Minutes
Enter the lease time of the DHCP server.
DNS Values
This field is only available when you select
Enable
in the
DHCP
field.
DNS
Select the type of service that you are registered for from your DNS service provider (
From
ISP
).
Select
DNS Proxy
if you have the DNS proxy service. The VMG redirects clients’ DNS
queries to a DNS server for resolving domain names.
Select
Static
if you have the Static DNS service.
LAN IPv6 Mode Setup
IPv6 State
Select
Enable
to activate the IPv6 mode and configure IPv6 settings on the VMG.
Link Local Address Type
EUI64
Select this to have the VMG generate an interface ID for the LAN interface’s link-local
address using the EUI-64 format.
Manual
Select this
to manually enter an interface ID for the LAN interface’s link-local address.
Lan Global Identifier Type
EUI64
Select this to have the VMG generate an interface ID using the EUI-64 format for its global
address .
Manual
Select this
to manually enter an interface ID for the LAN interface’s global IPv6 address.
LAN IPv6 Address Setup
Delegate prefix
from WAN
Select this option to automatically obtain an IPv6 network prefix from the service provider
or an uplink router.
Table 29
Network Setting > Home Networking > LAN Setup (continued)
LABEL
DESCRIPTION
Page 124 / 327
Chapter 8 Home Networking
VMG3926-B10A User’s Guide
124
Static
Select this option to configure a fixed IPv6 address for the VMG’s LAN IPv6 address.
MLD Snooping
Multicast Listener Discovery (MLD) allows an IPv6 switch or router to discover the presence
of MLD hosts who wish to receive multicast packets and the IP addresses of multicast
groups the hosts want to join on its network. Select
Enable MLD Snooping
to activate MLD
Snooping on the VMG. This allows the VMG to check MLD packets passing through it and
learn the multicast group membership. It helps reduce multicast traffic.
LAN IPv6
Address Assign
Setup
Select how you want to obtain an IPv6 address:
•
Stateless
: The VMG uses IPv6 stateless autoconfiguration. RADVD (Router
Advertisement Daemon) is enabled to have the VMG send IPv6 prefix information in
router advertisements periodically and in response to router solicitations. DHCPv6 server
is disabled.
•
Stateful
: The VMG uses IPv6 stateful autoconfiguration. The DHCPv6 server is enabled
to have the VMG act as a DHCPv6 server and pass IPv6 addresses to DHCPv6 clients.
•
Stateless and Stateful
: The VMG uses both IPv6 stateless and stateful
autoconfiguration. The LAN IPv6 clients can obtain IPv6 addresses either through router
advertisements or through DHCPv6.
LAN IPv6 DNS
Assign Setup
Select how the VMG provide DNS server and domain name information to the clients:
•
From Router Advertisement
: The VMG provides DNS information through router
advertisements.
•
From DHCPv6 Server
: The VMG provides DNS information through DHCPv6.
•
From RA & DHCPv6 Server
: The VMG provides DNS information through both router
advertisements and DHCPv6.
DHCPv6 Configuration
DHCPv6 State
This shows the status of the DHCPv6.
DHCP Server
displays if you configured the VMG to
act as a DHCPv6 server which assigns IPv6 addresses and/or DNS information to clients.
IPv6 Router Advertisement State
RADVD State
This shows whether RADVD is enabled or not.
IPv6 DNS Values
IPv6 DNS
Server 1-3
Select
From ISP
if your ISP dynamically assigns IPv6 DNS server information.
Select
User-Defined
if you have the IPv6 address of a DNS server. Enter the DNS server
IPv6 addresses the VMG passes to the DHCP clients.
Select
None
if you do not want to configure IPv6 DNS servers.
DNS Query
Scenario
Select how the VMG handles clients’ DNS information requests.
•
IPv4/IPv6 DNS Server
: The VMG forwards the requests to both the IPv4 and IPv6
DNS servers and sends clients the first DNS information it receives.
•
IPv6 DNS Server Only
: The VMG forwards the requests to the IPv6 DNS server and
sends clients the DNS information it receives.
•
IPv4 DNS Server Only
: The VMG forwards the requests to the IPv4 DNS server and
sends clients the DNS information it receives.
•
IPv6 DNS Server First
: The VMG forwards the requests to the IPv6 DNS server first
and then the IPv4 DNS server. Then it sends clients the first DNS information it receives.
•
IPv4 DNS Server First
: The VMG forwards the requests to the IPv4 DNS server first
and then the IPv6 DNS server. Then it sends clients the first DNS information it receives.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to restore your previously saved settings.
Table 29
Network Setting > Home Networking > LAN Setup (continued)
LABEL
DESCRIPTION
Page 125 / 327
Chapter 8 Home Networking
VMG3926-B10A User’s Guide
125
8.3
The Static DHCP Screen
This table allows you to assign IP addresses on the LAN to specific individual computers based on
their MAC Addresses.
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is
assigned at the factory and consists of six pairs of hexadecimal characters, for example,
00:A0:C5:00:00:02.
Use this screen to change your VMG’s static DHCP settings. Click
Network Setting > Home
Networking
> Static DHCP
to open the following screen.
Figure 51
Network Setting > Home Networking > Static DHCP
The following table describes the labels in this screen.
If you click
Static DHCP Configuration
in the
Static DHCP
screen or the Edit icon next to a static
DHCP entry, the following screen displays.
Figure 52
Static DHCP: Static DHCP Configuration/Edit
Table 30
Network Setting > Home Networking > Static DHCP
LABEL
DESCRIPTION
Static DHCP
Configuration
Click this to add a new static DHCP entry.
#
This is the index number of the entry.
Status
This field displays whether the client is connected to the VMG.
MAC Address
The MAC (Media Access Control) or Ethernet address on a LAN (Local Area Network) is
unique to your computer (six pairs of hexadecimal notation).
A network interface card such as an Ethernet adapter has a hardwired address that is
assigned at the factory. This address follows an industry standard that ensures no other
adapter has a similar address.
IP Address
This field displays the IP address relative to the # field listed above.
Modify
Click the
Edit
icon to have the IP address field editable and change it.
Click the
Delete
icon to delete a static DHCP entry. A window displays asking you to
confirm that you want to delete the selected entry.

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