HP DL380 User's Guide download pdf (Page 52)

teamed port. In other words, if frame order preservation is desired, outbound load balancing by the team

should be performed on a conversation-by-conversation basis rather than on a frame-by-frame basis.

To accomplish this, the load-balancing device (either a team or a switch) needs information to identify

conversations. Destination MAC address, Destination IP address, and TCP Connection are used to

identify conversations (see Figure 26).

Figure 26 Team Proper ties pag e , Transmitting Load B al ancing Met h od

It is very important to understand the differences between the load-balancing metho ds when deploying

HP ProLiant Network Adapter Teaming in an environment that requires load balancing of routed Layer 3

trafﬁc. Because the method s use c onversations to load balance, the resulting trafﬁcmaynotbedistributed

equally across all ports in the team. The beneﬁts of maintaining frame order outweigh the lack of perfect

trafﬁc distribution across teamed p orts’ members.

Implementers of HP ProLiant Network Adapter Te aming can choose the appropriate load balancing

method via the NCU.

Automatic (Recommended)

Automatic is a load-balancing method that is designed to p reserve frame ordering. This method will

load balance outbound trafﬁc based on the highest layer of information in the frame. For instance, if

a frame has a TCP header with TCP port values, the frame will be load balancing by TCP connection

(refer to “TCP Connection method” below) . If the frame has an IP header with an IP address but no TCP

hea

der, then the frame is load balanced by destination IP address (refer to “Destination IP Address

method” below). If the frame does not h ave an I P header, the frame is load balanced by destination

MAC address (refer to “Destination MAC Address method” below).

Aut

omatic is the HP-recommended setting for outbound load balancing. Although in the current product

Aut

omatic mode is identical to TCP Connection mode, future releases may augment the Automatic mode.

deploying this method now, future upgrades will automatically take advantage of the new intelligence.

Network adapter teaming

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HP DL380 User's Guide Page 52