IES-1000 User’s Guide

 

Table 13-1 DSL Port Channel Setup

 

 

LABEL

DESCRIPTION

 

 

Edit Port Setup

Click this link to go to the Edit Port Setup screen.

 

 

Port Setup

Click this link to go to the Port Setup screen.

 

 

VPI/VCI

This field displays the Virtual Path Identifier (VPI) and Virtual Circuit Identifier (VCI). The

 

VPI and VCI identify a channel on this port.

 

Click a link in the VPI/VCI column to open a screen where you can edit the VPI/VCI

 

settings.

 

 

Active

This field shows whether the channel is turned on (Yes) or not (No).

 

 

PVID

This is the PVID (Port VLAN ID) assigned to untagged frames or priority frames (0 VID)

 

received on this channel. An asterisks (*) denotes a super channel.

 

 

Priority

Type the priority value (0 to 7) to add to incoming frames without a (IEEE 802.1p) priority

 

tag. An asterisks (*) denotes a super channel.

 

 

VC Profile

This shows which VC profile the channel is set to use.

 

 

Add

Click this button to configure a new channel.

 

 

Delete

Select a channel’s Delete check box and click the Delete button to remove the channel.

 

 

13.3ATM QoS

ATM Quality of Service (QoS) mechanisms provide the best service on a per-flow guarantee. ATM network infrastructure was designed to provide QoS. It uses fixed cell sizes and built-in traffic management (see the following section on traffic shaping). This allows you to fine-tune the levels of services on the priority of the traffic flow.

13.4Traffic Shaping

Traffic shaping is an agreement between the carrier and the subscriber to regulate the average rate and fluctuations of data transmission over an ATM network. This agreement helps eliminate congestion, which is important for transmission of real time data such as audio and video connections.

13.4.1ATM Traffic Classes

These are the basic ATM traffic classes defined by the ATM Forum Traffic Management 4.0 Specification.

Constant Bit Rate (CBR)

Constant Bit Rate (CBR) is an ATM traffic class that provides fixed bandwidth. CBR traffic is generally time- sensitive (doesn’t tolerate delay). CBR is used for connections that continuously require a specific amount of bandwidth. Examples of connections that need CBR would be high-resolution video and voice.

Virtual Channel Management

13-3