3Com S330 manual VCM Card Configuration Menu

Configuring Virtual Circuits 133

Configuring the VCM To configure the VCM card, follow these steps:

Card

1From the VCM Configuration menu, shown earlier in Figure 100, select [3] Card Configuration to open the VCM Card Configuration menu. This menu lists information about the VCM card and allows you to set the card’s administrative status. Figure 102 shows a representative VCM Card Configuration menu.

Figure 102 VCM Card Configuration Menu

2Select [1] Set Admin Status and put the VCM card In Service or Out of Service.

Configuring Virtual Once you have configured the PathBuilder S330/S310’s modules and ports, you

Circuitscan start setting up virtual circuits. A virtual circuit is a bi-directional path between data ports of connecting ATM units. You should have a circuit plan developed in advance.

The PathBuilder S330/S310 supports both VPCs (virtual path connections) and VCCs (virtual channel connections). A virtual path is an aggregate collection of virtual channels for the purpose of assigning the channels to a single physical layer. A virtual channel is a connection between data ports.

■You define a VPC at the connecting units by assigning it a Virtual Path Identifier (VPI) for each direction of transmission.

■You define a VCC at the connecting units by assigning it a Virtual Path Identifier (VPI) and a Virtual Channel Identifier (VCI) for each direction of transmission. You can connect one or more virtual circuits to a data port by assigning each a different VPI and VCI. The VPI and VCI numbers are normally assigned as a pair: VPI/VCI.

When you add a virtual circuit, you make a connection from the selected port to for traffic to flow through the PathBuilder S330/S310 and across the ATM WAN service. Typically, the VPI and VCI numbers for one side of the circuit are assigned by the network service provider or local IS administrator—depending on whether your network is a public or private ATM network.