Which Physical Interface Is Active; Summary Of Nic States During Failover; Example Network Cabling Topologies With Adaptive Load Balancing; Example Adaptive Load Balancing Failover Scenario And Corresponding Nic Status - HP StorageWorks P4000 User Manual

Which physical interface is active

When the Adaptive Load Balancing 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
Motherboard:Port1 and Motherboard:Port2 are bonded in an Adaptive Load Balancing bond. If
Motherboard:Port1 fails, then Motherboard:Port2 remains active.
Once the link is fixed and Motherboard:Port1 is operational, it becomes active again.
Motherboard:Port2 remains active.
Table 26 Example Adaptive Load Balancing failover scenario and corresponding NIC status
Example failover scenario
1. Adaptive Load Balancing bond0 is created.
Motherboard:Port1 and Motherboard:Port2 are both
active.
2. Motherboard:Port1 interface fails. Because Adaptive
Load Balancing is configured, Motherboard:Port2 con-
tinues operating.
3. Motherboard:Port1 link failure is repaired.

Summary of NIC states during failover

Table 27 on page 95 shows the states of Motherboard:Port1 and Motherboard:Port2 when configured
for Adaptive Load Balancing.
Table 27 NIC status during failover with Adaptive Load Balancing
Failover status
Normal Operation
Motherboard:Port1 Fails, Data
Transfer Fails Over to Mother-
board:Port2
Motherboard:Port1 Restored

Example network cabling topologies with Adaptive Load Balancing

A simple network configuration using Adaptive Load Balancing in a high availability environment is
illustrated (Figure 38
Status of Motherboard:Port1
Preferred: No
Status: Active
Data Transfer: Yes
Preferred: No
Status: Passive (Failed)
Data Transfer: No
Preferred: No
Status: Active
Data Transfer: Yes
on page 96).
NIC status
• Bond0 is the master logical interface.
• Motherboard:Port1 is Active.
• Motherboard:Port2 is Active.
• Motherboard:Port1 status becomes Passive
(Failed).
• Motherboard:Port2 status remains Active.
• Motherboard:Port1 resumes Active status.
• Motherboard:Port2 remains Active.
Status of Motherboard:Port2
Preferred: No
Status: Active
Data Transfer: Yes
Preferred: No
Status: Active
Data Transfer: Yes
Preferred: No
Status: Active
Data Transfer: Yes
P4000 SAN Solution user guide 95