NC51xx PCIe 10 Gigabit Server Adapter Software and Configuration Guide

Installation and configuration 14
Property Parameter
Status Ring Size A descriptor ring size (queue size) for the status given by the network adapter to the
driver. Setting this value too low will impact the throughput because the network
adapter will start dropping packets. This parameter only affects receive operations
and does not affect transmit operations.
• Default: 8192
• Value: 1024/2048/4096/8192/16384/32768
Transmit IP Checksum
Offload
Enables the transmit IP checksum offload.
• Default: Enabled
• Values: Enabled/Disabled
Transmit Ring Size A descriptor ring size (queue size) for the transmit commands given by the driver to
the network adapter. It describes how many transmit operations can be given by the
host/driver to the network adapter at one time without overflowing the transmit
queue. Each of the entries in this queue describes one transmit/send operation by
the driver.
• Default: 1024
• Value: 1024/2048
Transmit TCP/UDP
Checksum Offload
Enables the transmit TCP and transmit UDP checksum offload.
• Default: Enabled
• Values: Enabled/Disabled
Vlan Id Sets the VLAN ID for this interface (also exposed through the standard OID). QoS
Packet Tagging must be enabled or the VLAN ID parameter is ignored.
• Default: 0 (no VLAN)
• Range: 0 – 4095
If multiple VLANs are set, the value is set to 0 (zero) and an intermediate driver is
used to set each VLan.
Modifying adapter properties using the NCU
The following section describes HP NC51xx 10 GbE server adapter properties that can be modified using
the HP Network Configuration Utility (NCU).
• Locally Administered Address. Specifies the user-defined MAC Address of the adapter, which
overrides the burned-in MAC Address. This box is disabled if the selected adapter has been teamed.
o Default = NULL
o Range = Valid unicast MAC Address
• 802.1p QoS Packet Tagging. Enables or disables IEEE 802.1p tagging to send network traffic with
different priority levels.
o Default = Enabled
o Range = Disabled; Enabled
• Maximum Frame Size. Specifies the maximum number of bytes in a single packet. Larger frames can
increase throughput and decrease CPU use by putting more data in each packet, thereby sending
out fewer packets. This is equivalent to Jumbo Frames and must comply with switch limitations.
o Default = 1500 bytes