Flow control – GarrettCom Magnum MNS-6K User Manual

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M A G N U M 6 K S W I T C H E S , M N S - 6 K U S E R G U I D E

with the 802.3u standard, then the port configuration on the switch must be manually set
to match the port configuration on the other device.

Possible port setting combinations for copper ports are:

• 10HDx: 10 Mbps, Half-Duplex
• 10FDx: 10 Mbps, Full-Duplex

• 100HDx: 100 Mbps, Half-Duplex
• 100FDx: 100 Mbps, Full-Duplex


Possible port settings for 100FX (fiber) ports are:

• 100FDx (default): 100 Mbps, Full-Duplex
• 100HDx: 100 Mbps, Half-Duplex


Possible port settings for 10FL (fiber) ports are:

• 10HDx (default): 10 Mbps, Half-Duplex
• 10FDx: 10 Mbps, Full-Duplex

Gigabit fiber-optic ports (Gigabit-SX and Gigabit-LX):

• 1000FDx (default): 1000 Mbps (1 GBPS), Full Duplex only

Auto: The port operates at 1000FDx and auto-negotiates flow control with the

device connected to the port


Flow Control

Flow control is for full duplex operation and the controls provided indicates the number
of buffers allowed for incoming traffic before a Rxon or Rxoff information is sent. RXon
is sent when the number of buffers used by the traffic falls below the specified level
(default is 4). Rxoff is sent when the number of buffers used goes above the specified
value (default is 6). The "flowcontrol" command is used to set the above thresholds. It
DOES NOT enable or DISABLE flow control

Disabled (default) – The port will not generate flow control packets and drops received
flow control packets
Enabled: The port uses 802.3x Link Layer Flow Control, generates flow control packets,
and processes received flow control packets.

With the port speed set to auto (the default) and flow control set
to enabled; the switch negotiates flow control on the indicated
port. If the port speed is not set to auto, or if flow control is
disabled on the port, then flow control is not used.

To set flow control

Syntax flowcontrol xonlimit=<value> xofflimit=<value>

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