Pakedge Device & Software SW24-GBP User Manual - 1.4.2.
pakedgedevice&software inc. / SW24-GBP
9
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Abbreviations and acronyms (continued)
QoS
Quality of Service
RAM
Random Access Memory
ROM Read-Only Memory
RSTP
Rapid Spanning Tree Protocol
TCP
Transmission Control Protocol
UART Universal Asynchronous Receiver Transmitter
UDP
User Datagram Protocol
VID
VLAN Identifier
1.4.2.
Functional Descriptions
1.4.2.1.
PHY Monitoring and Port Mode Set-up
The software continually monitors the PHYs to aid in setting up the switch ports. If the link is
active, the software determines the current speed, duplex mode, and pause capabilities of
the PHYs by polling them every 100 ms.
1.4.2.2.
Flow Control
Flow control (back pressure) is supported in both full-duplex and half-duplex. Flow control
can be enabled or disabled on a per-port basis from the command line interface or from the
WEB GUI interface. If flow control is enabled for a port, the associated PHY is set to support
“Symmetric Pause,” but not “Asymmetric Pause.” If the station connected to the port also
supports “Symmetric Pause,” flow control is enabled on the switch port. Watermarks are set
to hard-coded values. Different values are used depending on whether flow control is enabled
or not, and depending on the current speed.