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Chapter 6 Home Networking
eircom F1000 Modem User’s Guide
121
6.8
The STB Vendor ID Screen
Set Top Box (STB) devices with dynamic IP addresses sometimes don’t renew their IP addresses
before the lease time expires. This could lead to IP address conflicts if the STB continues to use an
IP address that gets assigned to another device. Use this screen to list the Vendor IDs of connected
STBs to have the Device automatically create static DHCP entries for them when they request IP
addresses.
Click
Network Setting
>
Home Networking
>
STB Vendor ID
to open this screen.
Figure 60
Network Setting > Home Networking > STB Vendor ID
The following table describes the labels in this screen.
6.9
The 5th Ethernet Port Screen
If you use a DSL connection, you can configure your Ethernet WAN port as an extra LAN port. This
Gigabit Ethernet port provides faster transmission speeds. Click
Network Setting
>
Home
Networking
>
5th Ethernet Port
to open this screen.
Offer Public IP
by DHCP
Select the checkbox to enable the Device to provide public IP addresses by DHCP server.
Enable ARP
Proxy
Select the checkbox to enable the ARP (Address Resolution Protocol) proxy.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
Table 32
Network Setting > Home Networking > Additional Subnet (continued)
LABEL
DESCRIPTION
Table 33
Network Setting > Home Networking > STB Vendor ID
LABEL
DESCRIPTION
Vendor ID 1 ~
5
Enter the STB’s vendor ID.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
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Note: The Device needs to restart to make the role change take effect.
Figure 61
Network Setting > Home Networking > 5th Ethernet Port
The following table describes the labels in this screen.
6.10
The LAN VLAN Screen
Click
Network Setting
>
Home Networking
>
LAN VLAN
to open this screen. Use this screen to
control the VLAN ID and IEEE 802.1p priority tags of traffic sent out through individual LAN ports.
Figure 62
Network Setting > Home Networking > LAN VLAN
Table 34
Network Setting > Home Networking > 5th Ethernet Port
LABEL
DESCRIPTION
State
Select
Enable
to use the Ethernet WAN port as a LAN port on the Device.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
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Chapter 6 Home Networking
eircom F1000 Modem User’s Guide
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The following table describes the labels in this screen.
6.11
The Wake on LAN Screen
Use this screen to turn on a device on the LAN network. To use this feature, the remote device must
also support Wake On LAN.
You need to know the MAC address of the LAN device. It may be on a label on the device or in its
documentation.
Click
Network Setting
>
Home Networking
>
Wake on Lan
to open this screen.
Figure 63
Network Setting > Home Networking > Wake on Lan
The following table describes the labels in this screen.
Table 35
Network Setting > Home Networking > LAN VLAN
LABEL
DESCRIPTION
Lan Port
These represent the Device’s LAN ports.
Tag Operation
Select what you want the Device to do to the IEEE 802.1q VLAN ID and priority tags of
downstream traffic before sending it out through this LAN port.
•
Unchange
- Don’t do anything to the traffic’s VLAN ID and priority tags.
•
Add
- Add VLAN ID and priority tags to untagged traffic.
•
Remove
- Delete one tag from tagged traffic. If the frame has double tags, this removes
the outer tag. This does not affect untagged traffic.
•
Remark
- Change the value of the outer VLAN ID and priority tags.
802.1P Mark
Use this option to set what to do for the IEEE 802.1p priority tags when you add or remark
the tags for a LAN port’s downstream traffic. Either select
Unchange
to not modify the
traffic’s priority tags or select an priority from 0 to 7 to use. The larger the number, the
higher the priority.
VLAN ID
If you will add or remark tags for this LAN port’s downstream traffic, specify the VLAN ID
(from 0 to 4094) to use here.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
Table 36
Network Setting > Home Networking > Wake on Lan
LABEL
DESCRIPTION
Wake by
Address
Select
Manual
and enter the IP address or MAC address of the device to turn it on remotely.
The drop-down list also lists the IP addresses that can be found in the Device’s ARP table.
Select an IP address and it will then automatically update the IP address and MAC address
in the following fields.
IP Address
Enter the IPv4 IP address of the device to turn it on.
MAC Address
Enter the MAC address of the device to turn it on. A MAC address consists of six
hexadecimal character pairs.
Wake up
Click this to send a wake up packet to wake up the specified device.
Page 124 / 359
Chapter 6 Home Networking
eircom F1000 Modem User’s Guide
124
6.12
Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
6.12.1
LANs, WANs and the Device
The actual physical connection determines whether the Device ports are LAN or WAN ports. There
are two separate IP networks, one inside the LAN network and the other outside the WAN network
as shown next.
Figure 64
LAN and WAN IP Addresses
6.12.2
DHCP Setup
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to
obtain TCP/IP configuration at start-up from a server. You can configure the Device as a DHCP
server or disable it. When configured as a server, the Device provides the TCP/IP configuration for
the clients. If you turn DHCP service off, you must have another DHCP server on your LAN, or else
the computer must be manually configured.
IP Pool Setup
The Device is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the
product specifications in the appendices. Do not assign static IP addresses from the DHCP pool to
your LAN computers.
6.12.3
DNS Server Addresses
DNS (Domain Name System) maps a domain name to its corresponding IP address and vice versa.
The DNS server is extremely important because without it, you must know the IP address of a
computer before you can access it. The DNS server addresses you enter when you set up DHCP are
passed to the client machines along with the assigned IP address and subnet mask.
There are two ways that an ISP disseminates the DNS server addresses.
•
The ISP tells you the DNS server addresses, usually in the form of an information sheet, when
you sign up. If your ISP gives you DNS server addresses, enter them in the
DNS Server
fields in
the
DHCP Setup
screen.
WAN
LAN
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•
Some ISPs choose to disseminate the DNS server addresses using the DNS server extensions of
IPCP (IP Control Protocol) after the connection is up. If your ISP did not give you explicit DNS
servers, chances are the DNS servers are conveyed through IPCP negotiation. The Device
supports the IPCP DNS server extensions through the DNS proxy feature.
Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It
does not mean you can leave the DNS servers out of the DHCP setup under all circumstances. If
your ISP gives you explicit DNS servers, make sure that you enter their IP addresses in the
DHCP Setup
screen.
6.12.4
LAN TCP/IP
The Device has built-in DHCP server capability that assigns IP addresses and DNS servers to
systems that support DHCP client capability.
IP Address and Subnet Mask
Similar to the way houses on a street share a common street name, so too do computers on a LAN
share one common network number.
Where you obtain your network number depends on your particular situation. If the ISP or your
network administrator assigns you a block of registered IP addresses, follow their instructions in
selecting the IP addresses and the subnet mask.
If the ISP did not explicitly give you an IP network number, then most likely you have a single user
account and the ISP will assign you a dynamic IP address when the connection is established. If this
is the case, it is recommended that you select a network number from 192.168.0.0 to
192.168.255.0 and you must enable the Network Address Translation (NAT) feature of the Device.
The Internet Assigned Number Authority (IANA) reserved this block of addresses specifically for
private use; please do not use any other number unless you are told otherwise. Let's say you select
192.168.1.0 as the network number; which covers 254 individual addresses, from 192.168.1.1 to
192.168.1.254 (zero and 255 are reserved). In other words, the first three numbers specify the
network number while the last number identifies an individual computer on that network.
Once you have decided on the network number, pick an IP address that is easy to remember, for
instance, 192.168.1.1, for your Device, but make sure that no other device on your network is
using that IP address.
The subnet mask specifies the network number portion of an IP address. Your Device will compute
the subnet mask automatically based on the IP address that you entered. You don't need to change
the subnet mask computed by the Device unless you are instructed to do otherwise.
Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are isolated from the
Internet, for example, only between your two branch offices, you can assign any IP addresses to
the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has
reserved the following three blocks of IP addresses specifically for private networks:
• 10.0.0.0
— 10.255.255.255
• 172.16.0.0
— 172.31.255.255
•
192.168.0.0 — 192.168.255.255

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