Taking over IP addresses
You can configure IP takeover if the layer2 option is not enabled. If you enabled the layer2 option, you can configure for IP takeover as you would in a distributed server environment.
About this task
For information about the layer2 option, see MAC headers in layer 2 mode.
Taking over an IP address overrides any previous allocation of this address to another LPAR. If another LPAR on the same CHPID already registered for that IP address, this association is removed.
An OSA-Express CHPID in QDIO mode can take over IP addresses from any IBM Z® operating system. IP takeover for HiperSockets CHPIDs is restricted to taking over addresses from other Linux® instances in the same Central Electronics Complex (CEC).
IP address takeover between multiple CHPIDs requires ARP for IPv4 and Neighbor Discovery for IPv6. OSA-Express handles ARP transparently, but not Neighbor Discovery.
- Stage 1: Ensure that your qeth group device is enabled for IP takeover
- Stage 2: Activate the address to be taken over for IP takeover
- Stage 3: Issue a command to take over the address