Summary Of Supported Vpi/Vci Ranges And Number Of Connections - 3Com 3C63100-AC-C - PathBuilder S600 Bridge/router Reference Manual

Summary of Supported
VPI/VCI Ranges and
Number of Connections
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 131.
Figure 131 Two Sides of a VC Configuration
Side A
Rx
VI 1
Tx
Note that Receive (Rx) and Transmit (Tx) directions are from the point of view of
STX. Assign the Rx and Tx VPI/VCI for Side A and Side B based on the diagram
shown in Figure 131.
Table 35 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).
N
Table 35 Summary of VPI/VCI Ranges and Supported Number of Connections
Card Type
DS3/E3/OC3/STM-1UNI
DS1/E1 IMA UNI
Ethernet/QSIM/HSIM/FAM
CBR DSX
CBR E1
*
N = (6144 - #VPIs-for-VCC) / #VPIs-for-VCC = 2047 with the default #VPIs-for-VCC (3)
**
K = VCC per VPI = {6144/8) - (#VPIs-for-VCC)} / (#VPIs-for-VCC)
For specific information about the number of connections supported for each
card, please see the PathBuilder S600 ATM WAN Access Switch Release Notes.
Configuring Virtual Circuits
STX
Rx
Tx
VPI/VCI Range for VPI/VCI Range for
VPC only VCC
(Rx = Tx) (Rx = Tx)
VPI = 0 ... 255 VPI = 0 ... 255
VCI = 1... N
VPI = 0 ... 31 VPI = 0 ...31
VCI = 1 ... K
VPI = 0 ...255
VCI = 1... N
VPI = 0 ...255
VCI = 1... N
VPI = 0 ...255
VCI = 1... N
171
Side B
VI 2
Supported
Number of
Connections
per Module
6144
*
768
**
256
24 VCs per port
(24 timeslots)
32 VCs per port
(32 timeslots)