D-Link DSL-2750U Router Manual PDF (Setup & Configuration Guide)

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

PVC Settings: VPI is the virtual path between two points in an ATM network and

its valid value is from 0 to 255. Default value is 8.



VCI is the virtual channel between two points in an ATM network, ranging from 32

to 65535 (0 to 31 is reserved for local management of ATM traffic). Default is 35.



Service Category: Select one of the following values from the drop-down list -

UBR Without PCR, UBR With PCR, CBR, Non Realtime VBR or Realtime VBR.



Protocol: Select one of the following values from the drop-down list – Bridging,

PPP over ATM (PPPoA), PPP over Ethernet (PPPoE), MAC Encapsulation

Routing (MER), IP over ATM (IPoA).



Qos scheduler: You can select between either

Strict Priority

or

Weighted Fair

Queuing

. QoS Scheduler provides for two options of bandwidth management

that can monitor the importance of data packets and depending upon the priority

of the packet, give it higher or lower priority or bandwidth level.

Strict Priority Queuing (SPQ) - queues are assigned a priority order and served

strictly according to that order. A low-priority queue may be starved if there are

always packets in higher-priority queues.

Weighted fair queuing (WFQ) - queues are each assigned a weight, and they

share the bandwidth of the port according to that weight.

Based on network calculus the DSL-2750U can build analytical models for traffic

flows under SPQ and WFQ scheduling.



Encapsulation Mode: Select the method of encapsulation provided by your

ISP.Select an option from the drop-down list – LLC/SNAP-Bridging, VC/MUX.

Click

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If you select the

PPP over Ethernet (PPPoE)

or

PPP over ATM (PPPoA)

as the

connection protocol, the following page appears.

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

PPP Username:

The correct user name that your ISP provides you.



PPP Password:

The correct password that your ISP provides you.



Authentication Method:

The value can be AUTO, PAP, CHAP, or MSCHAP.

Usually, AUTO will be selected.



Dial on demand (with idle timeout timer):

If this function is enabled, you

need to enter the idle timeout time. Within the preset time, if the modem does

not detect data flow , the modem automatically stops the PPPoE connection.

Once it detects data flow (like access to a webpage), the modem restarts the

PPPoE dialup.

If this function is disabled, the modem performs PPPoE dial-up all the time.

The PPPoE connnection does not stop, unless the modem is powered off or

the DSLAM or uplink equipment is faulty.



MTU Size:

Maximum Transmission Unit.This function sometimes must be

modified to access the network successfully.



PPP IP extension:

If this function is enabled, the WAN IP address obtained

by the modem through the built-in dial-up can be directly assigned to the PC

being attached to the modem (at this time, the modem connects to only one

PC). From the aspect of the PC user, the PC dials up to obtain an IP address.

But actually, the dial-up is done by the modem.

If this function is disabled, the modem itself obtains the WAN IP address.



Use Static IP Address:

If this function is disabled, the modem obtains an IP

address assigned by uplink equipment such as BAS, through PPPoE dial-up.

If this function is enabled, the modem uses this IP address as the WAN IP

address.



Enable NAT:

Select it to enable the NAT functions of the modem. If you do

not want to enable NAT and wish the modem user to access the Internet

normally, you must add a route on the uplink equipment. Otherwise, the

access to the Internet fails. Normally, NAT is enabled.



Enable Firewall:

Enable or disable IP filtering.



Enable IGMP Multicast

: IGMP proxy. For example, if you would like PPPoE

mode to support IPTV, enable this function.

If you select the

MAC Encapsulation Routing (MER)

as the connection protocol,

the following page appears.

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