HP Integrity rx2800 HP Integrity Network Adapter Teaming Whitepaper - Page 18
Network Fault Tolerance Only (NFT), Network Fault Tolerance Only with Preference Order
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Figure 3-4 Teaming types and functionality Basic Teaming Basic Teaming Advanced Teaming Basic Teaming Receive Load Balancing Transmit Load Balancing Switch Fault Tolerance* Network Fault Tolerance Only (NFT) Network Fault Tolerance Only with Preference Order Network Adapter Fault Tolerance Transmit Load Balancing with Fault Tolerance (TLB) Transmit Load Balancing with Fault Tolerance and Preference Order Switch-assisted Load Balancing with Fault Tolerance (SLB) 802.3ad Dynamic with Fault Tolerance Switch Fault Tolerance* Switch-assisted Dual Channel Load Balancing 802.3ad Dynamic Dual Channel Load Balancing *Switch Fault Tolerance means Team supports members connected to more than one switch. Network Fault Tolerance Only (NFT) Network Fault Tolerance (NFT) is the foundation of HP Integrity Network Adapter Teaming. In NFT mode, from two to eight teamed ports are teamed together to operate as a single virtual network adapter. However, only one teamed port-the Primary teamed port-is used for both transmit and receive communication with the server. The remaining adapters are considered to be standby (or secondary adapters) and are referred to as Non-Primary teamed ports. Non-Primary teamed ports remain idle unless the Primary teamed port fails. All teamed ports may transmit and receive heartbeats, including Non-Primary adapters. The fault-tolerance feature that NFT represents for HP Integrity Network Adapter Teaming is the only feature found in every other team type. It can be said that the foundation of every team type supports NFT. NFT is a basic feature of HP Integrity Network Adapter Teaming. Refer to "Basic Teaming Versus Advanced Teaming" for more information. Network Fault Tolerance Only with Preference Order Network Fault Tolerance Only with Preference Order is identical in almost every way to NFT. The only difference is that this team type allows the SA to prioritize the order in which teamed ports should be the Primary teamed port. This ability is important in environments where one or more teamed ports are more preferred than other ports in the same team. The need for ranking certain teamed ports better than others can be a result of unequal speeds, better adapter capabilities (for example, higher receive/transmit descriptors or buffers, interrupt coalescence, etc.), or preference for the team's Primary port to be located on a specific switch. NFT with Preference Order is a basic feature of HP Integrity Network Adapter Teaming. Refer to "Basic Teaming Versus Advanced Teaming" for more information. 18 Teaming Fundamentals for the First-Time User