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eircom F1000 Modem User’s Guide
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You can obtain your IP address from the IANA, from an ISP or it can be assigned from a private
network. If you belong to a small organization and your Internet access is through an ISP, the ISP
can provide you with the Internet addresses for your local networks. On the other hand, if you are
part of a much larger organization, you should consult your network administrator for the
appropriate IP addresses.
Note: Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address assignment,
please refer to RFC 1597, “Address Allocation for Private Internets”
and RFC 1466,
“Guidelines for Management of IP Address Space”.
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C
HAPTER
7
Routing
7.1
Overview
The Device usually uses the default gateway to route outbound traffic from computers on the LAN
to the Internet. To have the Device send data to devices not reachable through the default gateway,
use static routes.
For example, the next figure shows a computer (
A
) connected to the Device’s LAN interface. The
Device routes most traffic from
A
to the Internet through the Device’s default gateway (
R1
). You
create one static route to connect to services offered by your ISP behind router
R2
. You create
another static route to communicate with a separate network behind a router
R3
connected to the
LAN.
Figure 65
Example of Routing Topology
WAN
R1
R2
A
R3
LAN
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7.2
The Routing Screen
Use this screen to view and configure the static route rules on the Device. Click
Network Setting
> Routing > Static Route
to open the
following
screen.
Figure 66
Network Setting > Routing > Static Route
The following table describes the labels in this screen.
Table 37
Network Setting > Routing > Static Route
LABEL
DESCRIPTION
Add new static
route
Click this to configure a new static route.
#
This is the index number of the entry.
Status
This field displays whether the static route is active or not. A yellow bulb signifies that this
route is active. A gray bulb signifies that this route is not active. Click the bulb to enable/
disable the static route.
Name
This is the name that describes or identifies this route.
Destination IP
This parameter specifies the IP network address of the final destination. Routing is always
based on network number.
Subnet Mask/
Prefix Length
This parameter specifies the IP network subnet mask of the final destination.
Gateway
This is the IP address of the gateway. The gateway is a router or switch on the same
network segment as the device's LAN or WAN port. The gateway helps forward packets to
their destinations.
Interface
This is the WAN interface used for this static route.
Modify
Click the
Edit
icon to edit the static route on the Device.
Click the
Delete
icon to remove a static route from the Device. A window displays asking
you to confirm that you want to delete the route.
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7.2.1
Add/Edit Static Route
Use this screen to add or edit a static route. Click
Add new static route
in the
Routing
screen or
the
Edit
icon next to the static route you want to edit. The screen shown next appears.
Figure 67
Routing: Add/Edit
The following table describes the labels in this screen.
Table 38
Routing: Add/Edit
LABEL
DESCRIPTION
Active
This field allows you to activate/deactivate this static route.
Select this to enable the static route. Clear this to disable this static route without having to
delete the entry.
Route Name
Enter a descriptive name for the static route.
IP Type
Select whether your IP type is
IPv4
or
IPv6
.
Destination IP
Address
Enter the IPv4 or IPv6 network address of the final destination.
IP Subnet Mask
If you are using IPv4 and need to specify a route to a single host, use a subnet mask of
255.255.255.255 in the subnet mask field to force the network number to be identical to
the host ID. Enter the IP subnet mask here.
Use Gateway IP
Address
The gateway is a router or switch on the same network segment as the device's LAN or WAN
port. The gateway helps forward packets to their destinations.
If you want to use the gateway IP address, select
Enable
.
Gateway IP
Address
Enter the IP address of the gateway.
Use Interface
Select the WAN interface you want to use for this static route.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
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7.3
The DNS Route Screen
Use this screen to view and configure DNS routes on the Device. Click
Network Setting >
Routing > DNS Route
to open the
following
screen.
Figure 68
Network Setting > Routing > DNS Route
The following table describes the labels in this screen.
7.3.1
The DNS Route Add Screen
You can manually add the Device’s DNS route entry. Click
Add new DNS Route
in the
Network
Setting > Routing > DNS Route
screen. The screen shown next appears.
Figure 69
DNS Route Add
Table 39
Network Setting > Routing > DNS Route
LABEL
DESCRIPTION
Add new DNS
Route
Click this to add a new DNS route.
#
This is the index number of a DNS route.
Domain Name
This is the host name or domain name of the DNS route entry.
Interface
This is the WAN connection through which the Device forwards DNS requests for this domain
name.
Subnet Mask
This is the subnet mask of the DNS route entry.
Modify
Click the
Edit
icon to modify the DNS route.
Click the
Delete
icon to delete the DNS route.
19216811.live