Q-Logic 8100 SERIES manual Interrupt Support, Offload Support, NIC Bonding Linux

6–Configuring NIC Functionality in the Converged Network Adapter Configuring the NIC in a Linux Environment

Figure 6-30shows the sample output for the eth0 interface, associating the driver with the interface and the location of the adapter hardware on the PCI bus.

Figure 6-30. eth0 Interface Sample Output

NOTE:

Rebooting or reloading the QLogic FCoE driver (qlge), or adding other network interface cards may change the value of the network ID.

Interrupt Support

The QLogic 8100 Series Adapter does not support interrupt moderation.

Offload Support

The QLogic 8100 Series Adapter offloads common protocol processing onto its hardware, which reduces host CPU processing, and increases performance. The following types of offload are supported:

Checksum offload—The QLogic adapter supports checksum offloads for IP, TCP (IPv4, IPv6), UDP (IPv4, IPv6) packets and the IPv4 header. Checksum offload for these protocols is enabled by default and can be disabled using ethtool as described in “NIC Driver Parameters (Linux)” on page 6-29. Do not disable checksum offload unless you are debugging a checksum computation problem. Enabling TCP checksum offload significantly reduces host CPU processing when using jumbo frames.

Stateless offload—The QLogic 8100 Series Adapter supports large send offloading (LSO), which enables the Linux TCP stack to send one large block of data to the QLogic adapter, which then segments this large block into multiple TCP packets.

NIC Bonding (Linux)

You can configure multiple QLogic 8100 Series Adapters to appear as a single virtual network interface. This type of configuration is called teaming or trunking. Because two or more interfaces are combined, teaming provides advantages such as increased bandwidth, load balancing, and high link availability. There are two types of NIC bonding: switch independent and switch dependent.

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