  CONFIGURATION EDITOR

# Burst Control

Bc-- Committed Burst Size

Be-- Excess Burst Size

DE-- Discard Eligible

Enable Excess Burst Control

Mark Frame With DE Bit

Measurement Period

T-- Measurement Interval

Values for Configured Ports

Virtual-Port Specific Overrides

  The unit optionally limits Frame Relay traffic depending upon committed burst rate Bc and excess burst rate Be parameters.
  Some carriers assume end users will limit their traffic to confirm to these parameters, and discard traffic offered in excess of rate Bc + Be regardless if the network is congested.
  The Bc and Be parameters are definable for each virtual circuit. Global defaults may be used for virtual circuits not requiring unique parameter assignments.
  The following parameters are used to control the traffic on a virtual circuit:

DE-- Discard Eligible

  Determines whether the traffic offered in excess of the committed rate will be flagged as discard eligible.

Bc-- Committed Burst Size

  Defines how many bits will be transmitted in measurement interval T before it is flagged as discard eligible.

Be-- Excess Burst Size

  Defines how many bits in excess of Bc will be transmitted in measurement interval T. Some carriers discard traffic offered at a rate greater than Bc + Be regardless if the network is congested.

T-- Measurement Interval

  Defines the interval in seconds for committed and excess bit transmission.

Enable Excess Burst Control

  This switch defines whether or not the unit limits throughput on a per-PVC basis to the configured Excess Burst Size in the excess burst measure time period.
  Range: Enabled or Disabled

Mark Frame With DE Bit

  This switch defines whether or not the unit marks frames with the DE bit.
  If enabled, the unit marks non-urgent priority traffic frames with the DE bit, providing the bandwidth used by a port results in a value greater than the configured bandwidth.
  Range: Enabled or Disabled

Measurement Period

  This value defines the time period for calculating throughput (Tc), derived from the committed burst rate (Bc) and the committed information rate (CIR).
  Time Period Tc = Bc / CIR
  Range: 1 -- 5 seconds

Values for Configured Ports

  This feature enables you to adjust the burst rate parameters for each configured frame relay port.

Virtual-Port Specific Overrides

  This feature enables you to adjust the burst rate parameters for each configured virtual port.