The tasks do not have to be performed in sequence. Determine the general IPMP configuration that would suit your needs. Your IPMP configuration depends on what your network needs to handle the type of traffic that is hosted on your system. However, for a given TCP connection, inbound traffic normally follows only one physical path to minimize the risk of processing out-of-order packets. Thus, if your network handles a huge volume of outbound traffic, configuring a big number of interfaces into an IPMP group can improve network performance.
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These physical interfaces might or might not be on the same NIC. The interfaces are configured as members of the same IPMP group. If the system has additional interfaces on a second IP link, you must configure these interfaces as another IPMP group. A single interface can be configured in its own IPMP group. However, failover and failback cannot occur for an IPMP group with only one interface. Consider the example of four VLANs, bge, bge, bge, and bge When a failure occurs, the data addresses on the failed interface migrate to the standby interface.
Then, the standby interface is treated the same as other active interfaces until the failed interface is repaired.
Some failovers might not choose a standby interface. Instead, these failovers might choose an active interface with fewer data addresses that are configured as UP than the standby interface. You should configure only test addresses on a standby interface.
IPMP does not permit you to add a data address to an interface that is configured through the ifconfig command as standby. Any attempt to create this type of configuration will fail. Similarly, if you configure as standby an interface that already has data addresses, these addresses automatically fail over to another interface in the IPMP group.
Due to these restrictions, you must use the ifconfig command to mark any test addresses as deprecated and -failover prior to setting the interface as standby. You use IPMP options of the ifconfig command to create the configuration. An active interface is a physical interface that transmits both data traffic and probe traffic. For example, you can use the ifconfig command to obtain the status of a standby interface. You can observe this flag in the status lines for the interface in the ifconfig output.
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