atmIfCARtVbrEmissionPriority
1.3.6.1.4.1.562.2.4.1.114.3.3.100.1.82
This attribute is not applicable and is ignored for CQC-based ATM
cards.
This attribute specifies the emission priority (EP) which is used to
transmit traffic of the rt-VBR service category. A lower numerical
value for this attribute specifies a higher emission priority. 0 is the
highest EP and 7 is the lowest. Cells at a higher emission priority
receive higher preference for link bandwidth. EPs 0 and 1 are in the
absolute priority range, and are unaffected by any minimum
bandwidth guarantees. EPs 2 through 7 are in the guaranteed
bandwidth range. Minimum bandwidth guarantee is specified in the
AtmIf/n Ep/m component.
Emission priority setting must comply with all of the following
constraints:
1. The emission priority numbers must be in the following order:
CBR <= rt-VBR <= nrt-VBR <= ABR <= UBR
2. Two different ATM service categories may share the same EP
only if they are both shaped.
3. CBR and rt-VBR may be placed either in the absolute priority
range (EP 0 or 1) or in the guaranteed bandwidth range (EP 2
through 7).
4. If both CBR and rt-VBR are shaped, rt-VBR must share the
same EP with CBR or ABR. If either one of CBR or rt-VBR are
not shaped, then they cannot share the same EP.
5. ABR service category is always deemed to be shaped. If nrt-VBR
is shaped, it must share the same EP with ABR. If nrt-VBR is not
shaped it must have a higher EP than ABR.
6. If UBR is shaped, it must share the same EP with ABR. If UBR
is not shaped, it must have a lower EP than ABR.
This attribute does not apply to standard Vpt Vccs and basic Vpts.