Instruction Manual
11
Packet Priority & VLAN
Enables sending and receiving of IEEE 802.3ac tagged frames, which include:
802.1p QoS (Quality of Service) tags for priority-tagged packets
802.1Q tags for VLANs
Intel® PROSet automatically enables 802.1p tagging when you set up a VLAN. You
cannot disable QoS Packet Tagging on a VLAN because tagging is required for VLANs.
When this feature is enabled, tagged packets use the queue settings defined by the
operating system Priority Level Definition.
When this setting is disabled, the adapter cannot tag outgoing packets with
802.1p/802.1Q tags.
Performance Options
Receive Descriptors or Receive Buffers
Sets the number of buffers used by the driver when copying data to the protocol
memory. Increasing this value can enhance the receive performance, but also
consumes system memory.
Receive Descriptors are data segments that enable the adapter to allocate received
packets to memory. Each received packet requires one Receive Descriptor, and each
descriptor uses 2 KB of memory.
Transmit Descriptors or Transmit Buffers
Defines the number of Transmit Descriptors, which are data segments that enable the
adapter to track transmit packets in the system memory. Depending on the size of the
packet, each transmit packet requires one or more Transmit Descriptors.
You might choose to increase the number of Transmit Descriptors if you notice a
problem with transmit performance. Increasing the number of Transmit Descriptors
can enhance transmit performance. But, Transmit Descriptors consume system
memory. If transmit performance is not an issue, use the default setting.
