z/VM Virtual Networking Hints and Tips - Live Guest Relocation

  • Relocating guests with dedicated OSA network connections

    When the relocated guest uses a dedicated OSA device in layer-2 mode, you might need to notify the network switches of the new location. On Linux, use the arping command with the -U option to update the neighbors' ARP caches with the new location of the guest's MAC address.

    For example, a command like the following could be issued on the guest just after relocation:

    arping -U -Ieth0 -c3 -s0.0.0.0

    Alternatively, by omitting the count (-c) option, arping could be started before the relocation and terminated after relocation is complete, or it could be started at guest boot and run continuously.

This document is maintained by:

Montana Lee
z/VM Development