Summary Of Nic Status During Failover; Example Network Cabling Topologies With Active-Passive; Example Active-Passive Failover Scenario And Corresponding Nic Status; Nic Status During Failover With Active-Passive - HP StorageWorks P4000 User Manual

NOTE:
When the active interface comes back up, there is a 30–second delay before it becomes active.
Table 22 Example Active-Passive failover scenario and corresponding NIC status
Example failover scenario
1. Active-Passive bond0 is created. The active
(preferred) interface is Eth0.
2. Active interface fails. Bond0 detects the failure
and Eth1 takes over.
3. The Eth0 link is restored.

Summary of NIC status during failover

Table 23 on page 90 shows the states of Eth0 and Eth1 when configured for Active-Passive.
Table 23 NIC status during failover with Active-Passive
Failover status
Normal Operation
Eth0 Fails, Data Transfer
Fails Over to Eth1
Eth0 Restored

Example network cabling topologies with Active-Passive

Two simple network cabling topologies using Active-Passive in high availability environments are
illustrated (Figure 35
90 Managing the network
Status of Eth0
Preferred: Yes
Status: Active
Data Transfer: Yes
Preferred: Yes
Status: Passive (Failed)
Data Transfer: No
Preferred: Yes
Status: Active
Data Transfer: Yes
on page 91).
NIC status
• Bond0 is the master logical interface.
• Eth0 is Active.
• Eth1 is connected and is Passive (Ready).
• Eth0 status becomes Passive (Failed).
• Eth1 status changes to Active.
• Eth0 status changes to Active after a 30 second delay.
• Eth1 status changes to Passive (Ready).
Status of Eth1
Preferred: No
Status: Passive (Ready)
Data Transfer: No
Preferred: No
Status: Active
Data Transfer: Yes
Preferred: No
Status: Passive (Ready)
Data Transfer: No