Chapter 2 Tutorials
P-2812HNU-51c User’s Guide
43
2.3 How to Use ATM QoS with Multiple PVCs and
Interface Groups
Note: Voice traffic will not be affected by the user-defined QoS settings on the P-
2812HNU-51c. It always gets the highest priority.
The P-2812HNU-51c allows you to have more than one PVC using the ATM layer-2
interface. You can apply different ATM QoS settings to traffic through different
PVCs. In this example, real-time or video service, such as using a webcam to send
photos or uploading media content to share videos and images on a blog, comes
from LAN 1 and is forwarded out through PVC 1 (0/33). Non-time sensitive data
transfers, such as e-mail or FTP, come from LAN 2 or LAN 3 and are forwarded out
through PVC 2 (0/34). The maximum upstream transmission speed of your ADSL
port is 1 Mbps. You want to give the real-time traffic fixed bandwidth 400 Kbps
and higher priority over the general data transmission which shares the bandwidth
600 Kbps.
Note: To apply different QoS priorities to different applications over a PVC, use the
Advanced > QoS screens. The packet-level QoS feature is not applicable to a
PVC with CBR or Realtime VBR enabled.
Overview of what you have to do
1 Create PVCs using the Network > WAN screens. See Figure 2.3.1 on page 44.
Table 2 ATM QoS and Group Settings
TRAFFIC TYPE LAN PVC ATM QOS BANDWIDTH GROUP
Real-time or video
service
LAN1 atm1 (0/33) CBR 400 Kbps GR1
Non-time sensitive
data
LAN2, LAN3 atm2 (0/34) Non Realtime
VBR
600 Kbps GR2
PVC 1 (0/33)
PVC 2 (0/34)
GR1
GR2
