182
C
HAPTER
5: C
ONFIGURING
P
ATH
B
UILDER
S700 M
ODULES
, P
ORTS
,
AND
A
PPLICATIONS
n
You define a VPC at the connecting units by assigning it a Virtual Path Identifier
(VPI) for each direction of transmission.
n
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.
You configure a virtual circuit between virtual interfaces from side A to side B, with
all traffic passing through an STX, as shown in Figure 143.
Figure 143
Two Sides of a VC Configuration
Note that Receive (Rx) and Transmit (Tx) directions are from the perspective of the
STX module. Assign the Rx and Tx VPI/VCI for Side A and Side B based on the
diagram shown in Figure 143.
When you add a virtual circuit, you make a connection from the selected port to
for traffic to flow through the PathBuilder S700 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.
The port VPI/VCI ATM circuit designators must match the application being
supported. For example, if an OC3/STM-1 multi-mode fiber module is installed in
the Side B slot of the PathBuilder WAN Access Switch and is connected to a LAN
ATM switch device, then the Rx VPI/VCI for the ATM LAN interface must match the
Tx VPI/VCI for the OC3/STM-1 UNI module and vice versa. This ensures the first
step in making the connection into the PathBuilder S700.
Summary of Supported
VPI/VCI Ranges and
Number of Connections
Table 40 lists the VPI and VCI ranges and number of connections for all supported
card types.
The VPI/VCI ranges for the QSIM, HSIM, and FAM depend on the link type you
have chosen (DXI, HDLC/SDLC, or Frame Relay).
STX
Rx
Tx
Rx
Tx
Side A
VI 1
Side B
VI 2
Summary of Contents for 3C63400-3AC-C - PathBuilder S700 Switch
Page 14: ...xiv CHAPTER SUPPLEMENTARY REGULATORY INFORMATION ...
Page 18: ...4 ABOUT THIS GUIDE ...
Page 28: ...14 CHAPTER 1 SYSTEM DESCRIPTION ...
Page 88: ...74 CHAPTER 3 GETTING STARTED ...
Page 260: ...246 CHAPTER 6 PATHBUILDER S700 DIAGNOSTICS AND PERFORMANCE MONITORING ...
Page 270: ...256 INDEX ...