User guide

EDA System Services

1/1551-HSC 901 35/3 Uen C 2005-12-02

Table 6 Discarding Evaluation Steps

Step Evaluate

1 UBR: Strict priority queues 4

2 UBR: Strict priority queues 3, MDRR queues 2-4, DRR queues 1 – 4, PVC with one CoS

flow only

3 UBR: Strict priority queues 2, MDRR queues 1

UBR: Strict priority queues 1

5 VBR-nrt: Strict priority queues 4

6 VBR-nrt: Strict priority queues 3, MDRR queues 2-4, DRR queues 1 – 4, PVC with one

CoS flow only

7 VBR-nrt: Strict priority queues 2, MDRR queues 1

8 VBR-nrt Strict priority queues 1

9 VBR-rt: Strict priority queues 4

10 VBR-rt: Strict priority queues 3, MDRR queues 2-4, DRR queues 1 – 4, PVC with one CoS

flow only

11 VBR-rt: Strict priority queues 2, MDRR queues 1

12 VBR-rt: Strict priority queues 1

13 CBR: Strict priority queues 4

14 CBR: Strict priority queues 3, MDRR queues 2-4, DRR queues 1 – 4, PVC with one CoS

flow only

15 CBR: Strict priority queues 2, MDRR queues 1

16 CBR: Strict priority queues 1

If more than one queue is found in the same step, a packet from the

longest queue (largest number of packets) will be discarded.

4. ATM Prioritization (Native ATM QoS)

Measures have been taken to ensure that the full bandwidth provisioned for

the ADSL line is utilized during transmission of voice frames and that voice

frames can be transmitted as soon as they arrive and are available for

transmission. These measures are based on standard ATM QoS

mechanism, see Figure 46 on page 64.

Note that there will only be management traffic on the ADSL line if Interim

Local Management Interface (ILMI) is used to control the CPE. In this case