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Admin Duplex—Specifies the synchronized port duplex mode in bps. When Admin Duplex is set to full, Head-of-Line blocking is operational on the
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selected port. The possible fields values are:
Full—The interface supports transmission between the device and the client in both directions simultaneously. This is the default value.
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Half—The interface supports transmission between the device and the client in only one direction at a time.
¡
Current Duplex Mode— Specifies the synchronized port duplex mode. The possible field values are:
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Full
¡
Half
¡
Auto Negotiation—Enables Auto Negotiation on the device. Auto-negotiation is a protocol between two link partners that enables a port to advertise
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its transmission rate, duplex mode, and flow control abilities to its partner. The possible field values are:
Enable—Enables auto negotiation on the port.
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Disable—Disables auto negotiation on the port. This is the default value.
¡
Current Auto Negotiation—Indicates the Auto Negotiation operational status.
¡
Back Pressure—Enables Back Pressure mode on the device. Back Pressure mode is used with Half Duplex mode to disable ports from receiving
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messages. When Back Pressure is enabled, Head-of-Line blocking is not operational, even if it is set to enable.
The possible field values are:
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Enable—Enables back pressure on the port.
¡
Disable—Disable back pressure on the port. This is the default value.
¡
Current Back Pressure—Indicates the back pressure operational status.
¡
Flow Control—Indicates if Flow Control is enabled on the port. Flow control is enabled if the device is in Duplex mode. In addition, when Flow Control is
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enabled, Head-of-Line is disabled on the selected port. When Flow Control is enabled, Head-of-Line blocking is not operational, even if it is set to
enable. The possible field values are:
Enable—Indicates that Flow Control is enabled on the device.
¡
Disable—Indicates that Flow Control is disabled on the device. This is the default value.
¡
Current Flow Control—Indicates the Flow Control operational status.
¡
Auto-negotiation—Enables auto negotiation of Flow Control on the port.
¡
Tx Only—Enables auto negotiation for egress ports.
¡
Rx Only —Enables auto negotiation for ingress ports.
¡
MDI/MDIX—Allows the device to decipher between crossed and uncrossed cables. Hubs and switches are deliberately wired the opposite way end
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stations are wired, so that when a hub or switch is connected to an end station, a straight through Ethernet cable can be used, and the pairs match up
properly. When two hubs/switches are connected to each other, or two end stations are connected to each other, a crossover cable is used to make
sure that the correct pairs are connected. The standard cable wirings are:
Media Dependent Interface with Crossover (MDIX) for hubs and switches
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Media Dependent Interface (MDI) for end stations
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NOTE:
Auto MDIX does not operate on FE ports when auto negotiation is disabled.
The following table describes the parameter combination settings required to configure ports. These settings ensure that configuration functionalities are
maintained.
Auto Negotiation
Enabled Disabled
Auto
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illegal
MDI
legal
legal
MDIX legal
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Current MDI/MDIX—Indicates the MDIX operational status. The possible field values are:
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MDI
¡
MDIX
¡
Auto—Indicates that the value is set automatically.
¡
LAG—Specifies if the port is part of a LAG.
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Defining Port Parameters:
1. Open the Port Configuration page.
2. Select a port in the Port field.
3. Define the Description, Admin Status, Admin Speed, Admin Duplex, Auto Negotiation, Back Pressure, Admin Auto MDIX and/or Admin Flow Control
fields.
4. Click Apply Changes. The port parameters are saved to the device.
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