User guide

EDA System Services
66 1/1551-HSC 901 35/3 Uen C 2005-12-02
PVCs
IP DSLAM
Upstream traffic
PVC
policing
PVC
policing
VLAN
mapping
IP
DSLAM
overload
protection
CoS Flow
policing
classification
classification
classification
VLAN
mapping
classification
Multiple
Flow
service
IP and PPPoE
Services
On a
Single PVC
Classification based multi-flow
Ethertype based multi-flow
CoS Flow
policing
CoS Flow
policing
CoS Flow
policing
Figure 47 Upstream QoS Mechanisms
The upstream mechanisms work in the following steps:
1. Overload protection
The overload protection is only in use if there is more than one packet
waiting to be processed. There are three queues in the IP DSLAM
upstream overload protection. They correspond to the following ATM
classes:
Table 7 Overload Protection Queues
Queue Priority Classification Class
1 High VBR-rt
2 Medium VBR-nrt
3 Low UBR