HP LeftHand P4000 Virtual SAN Appliance Software - Manual (Page 59)

Table 20 Example Active-Passive failover scenario and corresponding NIC status
NIC status Example failover scenario
1. Active-Passive bond0 is created. The active (preferred)
interface is Eth0. •
Bond0 is the master logical interface.
•
Eth0 is Active.
•
Eth1 is connected and is Passive (Ready).
2. Active interface fails. Bond0 detects the failure and Eth1
takes over. •
Eth0 status becomes Passive (Failed).
• Eth1 status changes to Active.
3. The Eth0 link is restored. • Eth0 status changes to Active after a 30 second delay.
•
Eth1 status changes to Passive (Ready).
Summary of NIC status during failover
Table 21 (page 59) shows the states of Eth0 and Eth1 when configured for Active-Passive.
Table 21 NIC status during failover with Active-Passive
Status of Eth1 Status of Eth0 Failover status
Preferred: No Preferred: Yes Normal Operation
Status: Passive (Ready) Status: Active
Data Transfer: No Data Transfer: Yes
Preferred: No Preferred: Yes Eth0 Fails, Data Transfer Fails Over to
Eth1
Status: Active Status: Passive (Failed)
Data Transfer: Yes Data Transfer: No
Preferred: No Preferred: Yes Eth0 Restored
Status: Passive (Ready) Status: Active
Data Transfer: No Data Transfer: Yes
Example network cabling topologies with Active-Passive
Two simple network cabling topologies using Active-Passive in high availability environments are
shown in
Figure 26 (page 60) .
Configuring network interface bonds 59