| This attribute is a vector of four traffic parameters whose meanings
are defined by the rxTrafficDescType attribute. The values of peak
cell rate (PCR), sustained cell rate (SCR) and Minimum Cell Rate
(MCR) are expressed in cell/s. Maximum burst size (MBS) is
expressed in cells. The value of CDVT is expressed in
microseconds. The values of PCR, SCR, MCR, MBS and CDVT
are used for usage parameter control (UPC).
When rxTrafficDescType is 1 or 2, all of the parameters must be set
to zero (unused).
When rxTrafficDescType is 3, parameter 1 represents the PCR for
CLP equal to 0 and 1 traffic. Parameter 1 must be non-zero.
Parameters 2 and 3 must be set to zero (unused).
When rxTrafficDescType is 4, parameter 1 represents the PCR
for CLP equal to 0 and 1 traffic; parameter 2 represents the PCR for
CLP equal to 0 traffic with cell discard. Parameters 1 and 2 must be
non-zero. Parameter 3 must be set to zero (unused). Parameter 1
must be greater than or equal to parameter 2.
When rxTrafficDescType is 5, parameter 1 represents the PCR for
CLP equal to 0 and 1 traffic; parameter 2 represents the PCR for
CLP equal to 0 traffic with cell tagging. Parameters 1 and 2 must be
non-zero. Parameter 3 must be set to zero (unused). Parameter 1
must be greater than or equal to parameter 2.
When rxTrafficDescType is a 6, parameter 1 represents the PCR for
CLP equal to 0 and 1 traffic; parameter 2 represents the SCR for
CLP equal to 0 and 1 traffic; parameter 3 represents the MBS for
CLP equal to 0 and 1 traffic. Parameters 1, 2 and 3 must be non-
zero. Parameter 1 must be greater than or equal to Parameter 2.
When rxTrafficDescType is 7, parameter 1 represents the PCR for
CLP equal to 0 and 1 traffic; parameter 2 represents the SCR for
CLP equal to 0 traffic with cell discard; parameter 3 represents the
MBS for CLP equal to 0 traffic. Parameters 1, 2 and 3 must be non-
zero. Parameter 1 must be greater than or equal to parameter 2.
When rxTrafficDescType is 8, parameter 1 represents the PCR for
CLP equal to 0 and 1 traffic; parameter 2 represents the SCR for
CLP equal to 0 traffic with cell tagging; parameter 3 represents the
MBS for CLP equal to 0 traffic. Parameter 1, 2 and 3 must be non-
zero. Parameter 1 must be greater than or equal to parameter 2.
When rxTrafficDescType is 9, parameter 1 represents the PCR;
parameter 2 represents the CDVT; parameter 3 represents the MCR.
Parameter 4 is not used and must be zero. Parameter 1,must be non-
zero and must be greater than or equal to parameter 3. Parameter 3
may optionally be zero.
When rxTrafficDescType is any value from 3 through 8, parameter
4 represents the CDVT.
If the value of CDVT either in parameter 2 or in parameter 4 is zero,
the CDVT is taken from the CA defaults for the particular
atmServiceCategory of this connection.
On a CQC-based ATM card, when rxTrafficDescriptorType is 3
through 8, there are certain extreme combinations of
rxTrafficDescParm which are outside the capabilities of the UPC
hardware. The check prov command detects such cases and
generates an error message. If this happens, adjust the parameters
until they fall within the supported limits.
To calculate the limits, use the following formulae:
I1 = 1 000 000 000 / PCR
L1 = CDVT * 1000
I2 = 1,000,000,000 / SCR
L2 = CDVT + (MBS - 1) * (I2 - I1)
I1 and I2 must be less than or equal to 335,523,840. I1 + L1 must
be less than or equal to 1,342,156,800. I2 + L2 must be less than or
equal to 1,342,156,800. Note that I2 and L2 only apply when the
rxTrafficDescriptorType is 6 through 8.
If the values of I1, L1, I2 or L2 are closer to the limits described
above, a further restriction applies. Specifically, if either:
I1 > 41,940,480 or
I2 > 41,940,480 or
I1 + L1 > 167,769,600 or
I2 + L2 > 167,769,600
then both I1 and I2 must be greater than 20,480.
Parameter 5 of the rxTrafficDescParm is always unused.
If the rxTrafficDescType is sameAsTx, the values provisioned in
this attribute are ignored. The traffic parameters for the receive
direction are taken from the txTrafficDescParm. |
