User guide

Example of an iMAP Device Class Policy Quality of Service (QoS) Network Management
6-109
AlliedView NMS Administration Guide (Configuring Network Services)
6.11.9 Example of an iMAP Device Class Policy
6.11.9.1 Overview
Figure 6-94 shows a sample QoS configuration for a network, and it has the following attributes:
• The types of traffic flows are associated with specific VIDs.
• The video Head End uses the VLAN ID (VID) range of 3xx; these are then divided up into regions so that certain VIDS
are configured on upstream devices that connect with an iMAP product.
• The ISP Head End uses the VID range of 5xx.
• The voice over IP gateway uses the VID range of 7xx.
• The quality of service is defined entirely through priority queueing, so classifier filters are not used.
FIGURE 6-94 Sample QoS Network (iMAP MAP Device)
Table 6-21 lists the quality attributes for these classes of service.:
• For qos_voice, the subscriber is set up on a VLAN with the VID 701, and the voice traffic is the only incoming stream
with a VLAN tag; all other traffic is untagged and is given a tag by its port association.
• For qos_data the subscriber is set up on a VLAN with VID 501.
• For qos_video the subscriber is set up on a VLAN with VID 301, and will connect to the subscriber’s Set Top Box (STB).
TABLE 6-21 Classes of Service for a Subscriber
Class of Service Application Delay Jitter Packet Loss
qos_voice Voice Low Low Low
qos_video Video Low Undefined Low
qos_data internet access Undefined Undefined Low
default Non-critical Undefined Undefined Undefined