Size Classification

Feature Set N-ANL11

Platform
Intel® PAC
Napatech SmartNIC
Content Type
Feature Description

Size information

Information about the size of the frame is provided in extended packet descriptorsdescriptor 9.

Small frames

A frame is classified as small if the frame size is less than 64 bytes.

Jumbo frames

A frame is classified as a jumbo frame if the frame is an EtherII frame, and the frame size is larger than 1518 bytes, plus 30 bytes if the frame is ISL-encapsulated, plus 4 bytes for each VLAN tag, MPLS shim label or VN-Tag that is present.

Large frames

A frame is classified as a large frame if one of conditions are met:

  • The frame is a jumbo frame, and the frame size is larger than the maximum frame size in bytes determined by the MaxFrameSize parameter in the ntservice.ini file (see MaxFrameSize and DN-0449), plus 30 bytes if the frame is ISL-encapsulated, plus 4 bytes for each VLAN tag, MPLS shim label or VN-Tag that is present.
  • The frame is not an EtherII frame (and thereby not a jumbo frame), and the frame size is larger than 1518 bytes, plus 30 bytes if the frame is ISL-encapsulated, plus 4 bytes for each VLAN tag, MPLS shim label or VN-Tag that is present.