You added an interface to the IPMP group ipmp0 with the following commands: # ipadm create-ip net4 # ipadm add-ipmp -i net4 ipmp0 Which statement regarding the newly added interface is correct?

Question

Options

• ALink state failure detection will not occur.
• BProbe-based failure detection will not occur.
• CWithout a data IP address, it cannot become active.
• DThese changes will be lost when the system is booted.

• A
  3% (1)
• B
  84% (26)
• C
  3% (1)
• D
  10% (3)

Explanation

Option B is correct because probe-based failure detection requires a test IP address to be configured on the member interface - it's what IPMP uses as the source address when sending ICMP probes to target hosts. Since ipadm create-ip net4 and ipadm add-ipmp -i net4 ipmp0 add the interface without assigning any IP address, there is no test address available, so probe-based detection cannot function.

A is wrong because link-based failure detection monitors the physical link state (e.g., cable unplugged, NIC down) at the driver level and requires no IP address at all - it works regardless of IP configuration.

C is wrong because data addresses in IPMP are assigned to the group interface (ipmp0) itself, not to individual member interfaces; a member interface without its own data address can still participate actively in the group.

D is wrong because ipadm writes persistent configuration (stored in /etc/ipadm/), so the interface membership survives reboots - unlike the legacy ifconfig command which was transient.

Memory tip: Think "probes need a postcard address to send from" - no test IP = no probe, but the link light still turns off without one.

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