This group contains provisionable attributes which specify the VCC
space to be supported by this ATM interface. The VCC space
consists of an optional 'VPI Zero VCC Space' and an optional
'Programmable VCC Space'. If not specified otherwise, the
semantic checks described below are applicable only for the CQC-
based cards.
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 a
provisioned maximum. The size of the VPI Zero VCC Space must
either be 0 or a multiple of 256. A value of 0 implies that no
programmable VCCs can be used. In this case
numNonZeroVpisForVccs must also be 0.
The optional Programmable VCC Space is used to support VCCs
with a VPI other than zero. The VPI values supported in this space
must lie in a single contiguous range which excludes VPI 0. The
VCI values supported in this space range from 0 to a provisioned
maximum. The size of the Programmable VCC Space (should it
exist) must adhere to the following rules:
If (firstNonZeroVpiForVccs = 1) THEN
(numNonZeroVpisForVccs + 1) * numVccsPerNonZeroVpi
must be a multiple of 256
OTHERWISE
numNonZeroVpisForVccs * numVccsPerNonZeroVpi
must be a multiple of 256
The number of connection identifier resources in the VCC and VPC
space can be determined as follows:
The number of connection identifier resources in the VCC and VPC
space (not all of which are available for user connections) is
reported in the Lp/n Eng Arc totalConnectionPoolAvailable
attribute, 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)
The number of connection identifier resources must not exceed the
capacity of the port to which the interface is linked. If the Lp has an
Eng Arc Cqc Ov component provisioned with a non-zero
connectionPoolCapacity the port's capacity is specified by this
attribute. Otherwise the port's capacity is indicated by the Lp/n Eng
Arc totalConnectionPoolAvailable divided by the number of
physical ports on the card.