B&B Electronics 854-11121 - Manual - Manual (Page 23)

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Operation Mode 2 Port Based Xtra Tagging
Any port can be configured for extra tags on the frames.
Press the down arrow on the computer keyboard to access the additional
configuration commands.
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.