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8.2 Routing
The Routing page enables you to define specific route for your Internet and network data.
Most users do not need to define routes. On a typical small home or office LAN, the existing
routes that set up the default gateways for your LAN hosts and for the DSL device provide the
most appropriate path for all your Internet traffic.
-
On your LAN hosts, a default gateway directs all Internet traffic to the LAN
port(s) on the DSL device. Your LAN hosts know their default gateway either
because you assigned it to them when you modified your TCP/IP properties, or
because you configured them to receive the information dynamically from a
server whenever they access the Internet.
-
On the DSL device itself, a default gateway is defined to direct all outbound
Internet traffic to a route at your ISP. The default gateway is assigned either
automatically by your ISP whenever the device negotiates an Internet access,
or manually by user to setup through the configuration.
You may need to define routes if your home setup includes two or more networks or subnets,
if you connect to two or more ISP services, or if you connect to a remote corporate LAN.
Field
Description
Enable
Check to enable the selected route or route to be added.
Destination
The network IP address of the subnet. The destination can be specified
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Sitecom ADSL2+ Modem DC-227
42
as the IP address of a subnet or a specific host in the subnet. It can also
be specified as all zeros to indicate that this route should be used for all
destinations for which no other route is defined (this is the route that
creates the default gateway).
Subnet Mask
The network mask of the destination subnet. The default gateway uses
a mask of 0.0.0.0.
Next Hop
The IP address of the next hop through which traffic will flow towards
the destination subnet.
Metric
Defines the number of hops between network nodes that data packets
travel. The default value is 0, which means that the subnet is directly
one hop away on the local LAN network.
Interface
The WAN interface to which a static routing subnet is to be applied.
Add Route
Add a user-defined destination route.
Update
Update the selected destination route on the
Static Route Table
.
Delete Selected
Delete a selected destination route on the
Static Route Table
.
Show Routes
Click this button to view the DSL device’s routing table. The IP Route Table displays, as
shown in Figure.
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43
8.3 SNMP
Simple Network Management Protocol (SNMP) is a troubleshooting and management
protocol that uses the UDP protocol on port 161 to communicate between clients and servers.
The DSL device can be managed locally or remotely by SNMP protocol.
Field
Description
System Description System description of the DSL device.
System Contact
Contact person and/or contact information for the DSL device.
System Name
An administratively assigned name for the DSL device.
System Location
The physical location of the DSL device.
System Object ID
Vendor object identifier. The vendor’s authoritative identification of the
network management subsystem contained in the entity.
Trap IP Address
Destination IP address of the SNMP trap.
Community name
(read-only)
Name of the read-only community. This read-only community allows
read operation to all objects in the MIB.
Community name
(write-only)
Name of the write-only community. This write-only community allows
write operation to the objects defines as read-writable in the MIB.
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Sitecom ADSL2+ Modem DC-227
44
Apply Changes
Save SNMP configuration. New configuration will take effect after saving into flash
memory and rebooting the system.
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45
8.4 QOS
The DSL device provides a control mechanism that can provide different priority to different
users or data flows. The QoS is enforced by the QoS rules in the QoS table. A QoS rule
contains two configuration blocks:
Traffic Classification
and
Action
. The
Traffic
Classification
enables you to classify packets on the basis of various fields in the packet and
perhaps the physical ingress port. The
Action
enables you to assign the strictly priority level
for and mark some fields in the packet that matches the Traffic Classification rule. You can
configure any or all field as needed in these two QoS blocks for a QoS rule.
Field
Description
IP QoS
Enable/disable the IP QoS function.
Source IP
The IP address of the traffic source.
Source Netmask
The source IP netmask. This field is required if the source IP has been
entered.
Destination IP
The IP address of the traffic destination.
Destination
Netmask
The destination IP netmask. This field is required if the destination IP
has been entered.
Protocol
The selections are TCP, UDP, ICMP and the blank for none. This field is

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