redhat-upgrade-tool fails to reconfigure the static routes on the network interfaces, preventing the upgrade to happen

Solution Verified - Updated -

Issue

  • When executing redhat-upgrade-tool through a SSH connection, the command hangs after shutting down the network interfaces and the system is not pingable anymore

    # redhat-upgrade-tool --device /mnt/rhel76
    [...]
    Shutting down interface eth0:  Device state: 3 (disconnected)
    [  OK  ]
    Shutting down interface eth1:  Device state: 3 (disconnected)
    <HANG HERE>
    
  • Static routes are configured on the network interfaces

Environment

  • Red Hat Enterprise Linux 6
    • redhat-upgrade-tool (up to preupgrade-assistant-el6toel7-0.7.9-3.el6.noarch)
    • Multiple network interfaces
    • Static routes

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