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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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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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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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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