You can modify the following adapter attributes. The attribute behavior can vary, based on the adapter and driver you have.
Attribute Adapters/Drivers Description
Media Speed(media_speed) v 2-Port 10/100/1000 Base-TX PCI-X Adapter
v 10/100/1000 Base-T Ethernet PCI-X Adapter Device Driver
The media speed attribute indicates the speed at which the adapter attempts to operate. The available speeds are 10 Mbps half-duplex, 10 Mbps full-duplex, 100 Mbps half-duplex, 100 Mbps full-duplex and autonegotiation, with a default of autonegotiation. Select
auto-negotiate when the adapter should use autonegotiation across the network to determine the speed. When the network will not support autonegotiation, select the specific speed.
1000 MBps half and full duplex are not valid values. According to the IEEE 802.3z
specification, gigabit speeds of any duplexity must be autonegotiated for copper (TX)-based adapters. If these speeds are desired, select auto-negotiate.
Media Speed(media_speed) v 2-Port Gigabit Ethernet-SX PCI-X Adapter
v Gigabit Ethernet-SX PCI-X Adapter Device Driver
The media speed attribute indicates the speed at which the adapter attempts to operate. The available speeds are 1000 Mbps full-duplex and autonegotiation. The default is autonegotiation.
Select auto-negotiate when the adapter should use autonegotiation across the network to determine the duplexity. When the network does not support autonegotiation, select 1000 Mbps full-duplex.
Attribute Adapters/Drivers Description Media Speed(media_speed) v 10/100 Mbps Ethernet PCI Adapter
Device Driver
The media speed attribute indicates the speed at which the adapter attempts to operate. The available speeds are 10 Mbps half-duplex, 10 Mbps full-duplex, 100 Mbps half-duplex, 100 Mbps full-duplex and autonegotiation, with a default of autonegotiation. When the adapter should use autonegotiation across the network to determine the speed, select autonegotiate.
When the network will not support autonegotiation, select the specific speed.
If autonegotiation is selected, the remote link device must also be set to autonegotiate to ensure the link works correctly.
Media Speed(media_speed) v 10/100/1000 Base-T Ethernet PCI adapter
v Gigabit Ethernet-SX PCI Adapter Device Driver
The media speed attribute indicates the speed at which the adapter attempts to operate. The available speeds are 10 Mbps half-duplex, 10 Mbps full-duplex, 100 Mbps half-duplex, 100 Mbps full-duplex and autonegotiation, with a default of autonegotiation. Select autonegotiate when the adapter should use autonegotiation across the network to determine the speed.
When the network will not support autonegotiation, select the specific speed.
For the adapter to run at 1000 Mbit/s, the autonegotiation setting must be selected.
Note: For the Gigabit Ethernet-SX PCI Adapter, the only selection available is autonegotiation.
Enable Alternate Ethernet Address(use_alt_addr)
Setting this attribute to yes indicates that the address of the adapter, as it appears on the network, is the one specified by the Alternate Ethernet Address attribute. If you specify the novalue, the unique adapter address written in a ROM on the adapter card is used. The default value is no.
Alternate Ethernet Address(alt_addr)
Allows the adapter unique address, as it appears on the LAN network, to be changed.
The value entered must be an Ethernet address of 12 hexadecimal digits and must not be the same as the address of any other Ethernet adapter. There is no default value. This field has no effect unless the Enable Alternate Ethernet Address attribute is set to yes value, in which case this field must be filled in. A typical Ethernet address is 0x02608C000001. All 12 hexadecimal digits, including leading zeros, must be entered.
Enable Link Polling (poll_link)
v 10/100Mbps Ethernet PCI Adapter Device Driver
Select no to cause the device driver to poll the adapter to determine the status of the link at a specified time interval. The time interval value is specified in the Poll Link Time Interval field. If you select no, the device driver will not poll the adapter for its link status. The default value is no.
Attribute Adapters/Drivers Description Poll Link Time Interval
(poll_link_time)
v 10/100Mbps Ethernet PCI Adapter Device Driver
The amount of time, in milliseconds, between polls to the adapter for its link status that the device driver is allowed. This value is required when the Enable Link Polling option is set to yes. A value between 100 through 1000 can be specified. The incremental value is 10. The default value is 500.
Flow Control(flow_ctrl) v 10/100/1000 Base-T Ethernet PCI-X Adapter Device Driver
v Gigabit Ethernet-SX PCI-X Adapter Device Driver
v 2-Port 10/100/1000 Base-TX PCI-X Adapter
v 2-Port Gigabit Ethernet-SX PCI-X Adapter
v Gigabit Ethernet-SX PCI Adapter Device Driver
This attribute specifies whether the adapter should enable transmit and receive flow control. The default value is no.
Transmit Jumbo Frames (jumbo_frames)
v 10/100/1000 Base-T Ethernet PCI-X Adapter Device Driver
v Gigabit Ethernet-SX PCI-X Adapter Device Driver
v 2-Port 10/100/1000 Base-TX PCI-X Adapter
v 2-Port Gigabit Ethernet-SX PCI-X Adapter
v Gigabit Ethernet-SX PCI Adapter Device Driver
Setting this attribute to yes indicates that frames up to 9018 bytes in length might be transmitted on this adapter. If you specify no, the maximum size of frames transmitted is 1518 bytes. Frames up to 9018 bytes in length can always be received on this adapter.
Attribute Adapters/Drivers Description
Setting this attribute to yes indicates that the adapter calculates the checksum for
transmitted and received TCP frames. If you specify no, the checksum will be calculated by the appropriate software.
When a virtual Ethernet adapter has checksum offload enabled, the adapter advertises it to the hypervisor. The hypervisor tracks which virtual Ethernet adapters have checksum offload enabled and manages inter-partition communication accordingly.
When network packets are routed through the Shared Ethernet Adapter, there is a potential for link errors. In this environment, the packets must traverse the physical link with a
checksum. Communication works in the following way:
v When a packet is received from the physical link, the physical adapter verifies the checksum. If the packet’s destination is a virtual Ethernet adapter with checksum offload enabled, the receiver does not have to perform checksum verification. A receiver that does not have checksum offload enabled will accept the packet after checksum verification.
v When a packet originates from a virtual Ethernet adapter with checksum offload enabled, it travels to the physical adapter without a checksum. The physical adapter will generate a checksum before sending the packet out. Packets originating from a virtual Ethernet adapter with checksum offload disabled generate the checksum at the source.
To enable checksum offload for a Shared Ethernet Adapter, all constituent devices must have it enabled as well. The shared Ethernet device will fail if the underlying devices do not have the same checksum offload settings.
Enable Hardware Transmit
This attribute specifies whether the adapter is to perform transmit TCP resegmentation for TCP segments. The default value is no.