ADTRAN IQ 710 System Manual page 275

61202800L1-1B
IQ 710
Section 6, Configuration Guides
Page 275
PVC AND APPLICATION LEVEL TRAFFIC SHAPING BETWEEN
MULTIPLE SITES WITH THE IQ 710
Introduction
The ADTRAN IQ 710 lets IT managers see network problems and correct them through traffic shaping.
Traffic shaping is especially important in delay-sensitive applications such as packet voice. This configu-
ration guide describes how to configure traffic shaping between a host and two remote sites.
Before You Begin
For this example, each IQ 710 unit will require a T1/FT1 network interface module (P/N 1202802L1) and
must have traffic shaping software installed.
Network Description
Figure 1 on page 276 shows the frame relay example network used in this configuration guide. In this
example, the host site is Huntsville. Two PVCs originate from Huntsville. One circuit is connected to
Atlanta and the other to Birmingham. The two DLCIs used by the host site to communicate with the
remotes are 16 and 17. Atlanta and Birmingham are the two remote sites. They both use DLCI 20 for com-
munication with Huntsville. Please remember that DLCIs have local significance and are assigned by the
telephone company when the frame relay network is built; therefore the DLCIs for your frame relay net-
work will most likely be different from the ones used in this example.
In this example, the host is equipped with a full T1 connection. The Atlanta remote site is served by a Frac-
tional T1 (FT1) with a port rate of 256K. The Birmingham remote site is served by a FT1 with a port rate
of 128K. The Atlanta site is performing file transfers and voice traffic is being passed via VoIP. The Bir-
mingham site is accessing the Internet via the corporate connection and voice traffic is being passed via
VoIP.
VoIP networks often suffer from poor voice quality due to network congestion. Internet downloads by the
remote sites can cause more data to be sent from the host to the remote than the network can handle, thus
causing network delay and lost information. Enabling traffic shaping at the remote sites controls the avail-
able bandwidth. This ensures sufficient bandwidth for the voice and prevents lost information.
© 2002 ADTRAN, Inc. IQ 710 System Manual