Specifications

Chapter 3: Configuration
LGC340A 724-746-5500 | blackbox.com Page 25
3.5.3.5 Bandwidth (bw)
Displays
settings for Bandwidth configuration.
SFP A/B Ports
Ingress
Bandwidth Limit
(CIR)
Monitors the traffic entering the unit (ingress), discarding
traffic that exceeds a fixed Committed Information Rate
(CIR) plus Burst Allocation (BA). Frames are not held in
queue, they either meet the bandwidth limits and are
accepted into the unit or they are dropped.
Max Burst
Allocation size
(BA)
The BA size is specified in bits; the # of bits above the
bandwidth limit before packets are thrown away.
Ingress Burst
Allocation
Bandwidth Limiting can be set at Ingress of each port
individually by setting the MAX Bandwidth Limit in
bits/Sec. and the BA in bits. Traffic in excess of the
Bandwidth limit plus BA for any time interval will be
dropped. This function utilizes an advanced “Leaky
Token-Bucket” algorithm to provide typical resolution
under 5% of the set values at all data rate and frames
sizes.
Egress Traffic
Shaping
Egress Traffic shaping actively controls the transmitter
and hard limits the maximum frame rate that can be sent.
Frames can be delayed in the internal buffers of the unit,
waiting their turn to be sent. If the internal buffers are full,
excess traffic will be dropped. The Unit Rate Control can
be used to alleviate this.