Dell Broadcom NetXtreme Family of Adapters Broadcom NetXtreme II Network Adapt - Page 98

Broadcom Teaming Services: Broadcom NetXtreme II Network Adapter User Guide assigned to a different port. Figure 2: Intermediate Driver Outbound Traffic Flow The Broadcom Intermediate Driver manages the outbound traffic flow for all teaming modes. For outbound traffic, every packet is first classified into a flow, and then distributed to the selected physical adapter for transmission. The flow classification involves an efficient hash computation over known protocol fields. The resulting hash value is used to index into an Outbound Flow Hash Table.The selected Outbound Flow Hash Entry contains the index of the selected physical adapter responsible for transmitting this flow. The source MAC address of the packets will then be modified to the MAC address of the selected physical adapter. The modified packet is then passed to the selected physical adapter for transmission. The outbound TCP and UDP packets are classified using Layer 3 and Layer 4 header information. This scheme improves the load distributions for popular Internet protocol services using well-known ports such as HTTP and FTP. Therefore, BASP file:///T|/htdocs/NETWORK/BroadCom/71921/NetXtremeII/en/teamsvcs.htm[9/26/2012 3:29:14 PM]