Table 4-1 Values For Vpi And Vci - Cabletron Systems SmartCell 6A000 User Manual

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Table 4-1
VCC Mask Index VPI Bits
0 0
1 2
2 4
3 6
Use the command to view the four preconfigured VPI/VCI combinations.
show vccmask
SmartCell ZX # show vccmask
MaskIndex VpiShift
(In bits)
============================================================================
0 0
1 2
2 4
3 6
SmartCell ZX #
VCCMask combinations dictate what numerical values can be used for VPI/VCI pairs. Any VPI and VCI pairs that fit
the bit distribution of one of the indexed combinations can be used for defining a PVC. If the VPI and VCI values do
not fit one of the indexed combinations, the SmartCell 6A000 uses the closest matching indexed combination.
If you need to use values for VPI and VCI that do not fall within the range of one of the preconfigured indexed
combinations, use the
set vccmask
For example, change VCCMask indexed combination zero (0) from VPI = 0 bits and VCI = 12 bits to
VPI = 3 bits and VCI = 9 bits.
1. Use to change the VPI/VCI values to 3/9.
set vccmask
SmartCell ZX # set vccmask
MaskIndex(0)
VPIShift(0)
VCIShift(12)
SmartCell ZX #
Use the
2.
show vccmask
SmartCell ZX # show vccmask
MaskIndex VpiShift
(In bits)
============================================================================
0 3
1 2
2 4
3 6
SmartCell ZX #
Values for VPI and VCI
VPI Values
0
0 to 3
0 to 15
0 to 63
VciShift
(In bits)
12
10
8
6
command to replace one of the preconfigured combinations.
: <we replace the first VPI/VCI pair
: 3
: 9
command to see the new VPI/VCI combination.
VciShift
(In bits)
<for index 0, VPI/VCI now equals 3/9
9
10
8
6
VCI Bits VCI Values
12 0 to 4096
10 0 to 1023
8 0 to 255
6 0 to 63
SmartCell 6A000 User Guide 4-15
PVC Connections