This group contains operational attributes which specify the VCC
space to be supported by an ATM interface. The VCC space
consists of an optional 'VPI Zero VCC Space' and an optional
'Programmable VCC Space'.
The VPI Zero VCC Space is used to support VCCs with a VPI of
zero. The VCI values supported in this space range from 0 to an
optionally provisioned maximum of numVccsForVpiZero. The size
of the VPI Zero VCC Space is either 0 or a multiple of 256. A value
of 0 implies that not only can no VCCs be provisioned in the VPI
Zero VCC Space but no Programmable VCCs can be used. In this
case numNonZeroVpisForVccs will also be 0.
The optional Programmable VCC Space supports VCCs with a VPI
other than zero. The VPI values supported in this space lie in a
single contiguous range which excludes VPI 0. The VCI values
supported in this space range from 0 to an optionally provisioned
maximum.
The number of connection identifier resources in the VCC and VPC
space (not all of which are available for user connections) is the
value reported in the Lp/n Eng Arc totalConnectionPoolAvailable
attribute divided by the number of physical ports on the card, and
can be determined as follows:
IF (numNonZeroVpisForVccs = 0) THEN
number of connection ID resources =
256 + numVccsForVpiZero
OTHERWISE IF (firstNonZeroVpiForVccs = 1) THEN
number of connection ID resources =
256 + numVccsForVpiZero +
(numNonZeroVpisForVccs + 1) * numVccsPerNonZeroVpi
OTHERWISE
number of connection ID resources =
256 + numVccsForVpiZero +
(numNonZeroVpisForVccs * numVccsPerNonZeroVpi)