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Transition Networks Section Vl: FBRM/BFFG Software Features
Software feature descriptions, continued
Table 3: Device Software configurable Features (continued)
Feature
Description
Pause (flow control) and
Back Pressure
Pause is used to suspend data transmission temporarily
to relieve buffer congestion. If a Device needs sometime
to clear network congestion, it will send a pause signal
to the Device at the other end, then that Device will wait
a predetermined amount of time before re-transmitting
its data.
This feature reduces data bottlenecks and allows
efficient use of network Devices, preventing data losses.
The pause feature is set in Firmware mode, using the
SNMP interface. It can be set to one of four settings:
• Disable (no pause)
• Symmetrical pause
• Asymmetric TX (transmit) pause
• Asymmetric RX (receive) pause
Note: Enable the “pause feature” if available on ALL
network Devices attached to the media
Device(s), otherwise disable this feature.
Back pressure is used in half duplex mode. Back
pressure ensures the retransmission of incoming packets
when a port using half-duplex is temporarily not able to
receive in coming frames.
Point System
Management
The slide-in Device plugs into the chassis to provide
management through the I
2
C interface. This provides
SNMP and Web-based management through the MMU.
Continued on next page
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