3Com 3C421600A Management Manual page 212

210 C 13: U
HAPTER SING
F R
RAME ELAY
Table 56 Optional PVC Parameters
Parameter
bc_max
bc_min
be
becn_cmp
becn-monitoring
cir
cir_monitoring
Term
Maximum Committed Burst
Rate
Minimum Committed Burst
Rate
Excess Burst Size
Backward Explicit
Congestion Notification
Congestion Monitoring
Period
Backward Explicit
Congestion Notification
Monitoring
Committed Information
Rate
Committed Information
Rate Monitoring
Description
When BECN Monitoring is
enabled this value is used as
the starting point for Bc
calculations. Bc is the
number of bits a PVC is
allowed to burst above CIR
during a Committed Rate
Measurement Interval (Tc).
Any data in excess of Bc is
marked DE.
This is lowest possible value
for Bc. The Bc algorithm may
not calculate a Bc lower than
bc_min.
The number of bits above Bc
that a PVC is allowed to
burst. All data above Bc is
marked DE. Any data in
excess of Be is discarded.
The number of seconds in
each BECN Monitoring
Interval.
Determines the ratio of BECN
frames to non-BECN frames
during a becn_cmp. If there
are more BECN frames than
non-BECN frames Bc is
adjusted lower.
The rate in bits per second
that the carrier guarantees
for a given PVC.
I
f enabled, the RAS 1500 will
monitor the throughput for a
given PVC and calculate Bc in
conjunction with
becn_monitoring. If disabled
the PVC is allowed to send
data at up to the access line
rate.