
Frame Relay Overview
117376-B Rev. 00 2-23
Setting Minimum Acceptable Throughput
Throughput that an SVC actually uses may be less than it requests because the
local router, the frame relay network, and the remote end of the connection
negotiate QoS. You can use the Outgoing and Incoming Minimum Acceptable
Throughput parameters to set the lowest throughput value the router will accept. If
either the local router, the network, or the remote end cannot guarantee that value,
the SVC will not be established.
Defining
Incoming
and
Outgoing
If a local router originates the call, the outgoing committed burst, excess burst,
and throughput values define characteristics of data the local router transmits.,
while the incoming values define characteristics of data the local router receives.
If the local router receives a call, the outgoing values define characteristics of data
the local router receives, while incoming values define characteristics of data the
local router transmits. T
able 2-3 explains this further.
Traffic Shaping Considerations
Traffic shaping is best used at central offices to prevent the “big pipe” from
sending too much data too quickly to remote sites with “little pipes.” Let this
principle guide your decisions about how to use traffic shaping on your network.
CIR Configuration Guidelines
Consider the following when you configure traffic shaping.
• In general, the value you assign to the B
c
should equal 1/4 of the CIR to avoid
excessive queuing and dropped packets.
Table 2-3. Incoming and Outgoing
Call Originator Direction of Data Parameter Values that Apply
Local router Outgoing to remote router Outgoing
Incoming from remote router Incoming
Remote router Incoming to local router Outgoing
Outgoing from local router Incoming
Comentarios a estos manuales