HP P4000 9.0 HP StorageWorks P4000 SAN Solution User Guide - Page 93

Which physical interface is preferred Because the logical interface uses both NICs simultaneously for data transfer, neither of the NICs in an aggregation bond is designated as preferred. Which physical interface is active When the Link Aggregation Dynamic Mode bond is created, if both NICs are plugged in, both interfaces are active. If one interface fails, the other interface continues operating. For example, suppose Eth0 and Eth1 are bonded in a Link Aggregation Dynamic Mode bond. If Eth0 fails, then Eth1 remains active. Once the link is fixed and Eth0 is operational, it becomes active again. Eth1 remains active. Table 24 Link aggregation dynamic mode failover scenario and corresponding NIC status Example failover scenario 1. Link Aggregation Dynamic Mode bond0 is created. Eth0 and Eth1 are both active. NIC status • Bond0 is the master logical interface. • Eth0 is Active. • Eth1 is Active. 2. Eth0 interface fails. Because Link Aggregation Dynamic • Eth0 status becomes Passive (Failed). Mode is configured, Eth1 continues operating. • Eth1 status remains Active. 3. Eth0 link failure is repaired. • Eth0 resumes Active status. • Eth1 remains Active. Summary of NIC states during failover Table 25 on page 93 shows the states of Eth0 and Eth1 when configured for Link Aggregation Dynamic Mode. Table 25 NIC status during failover with link aggregation dynamic mode Failover status Normal Operation Status of Eth0 Preferred: No Status: Active Data Transfer: Yes Status of Eth1 Preferred: No Status: Active Data Transfer: Yes Eth0 Fails, Data Transfer Fails Over to Eth1 Preferred: No Status: Passive (Failed) Data Transfer: No Preferred: No Status: Active Data Transfer: Yes Eth0 Restored Preferred: No Status: Active Data Transfer: Yes Preferred: No Status: Active Data Transfer: Yes P4000 SAN Solution user guide 93