When I enable traffic shaping for a Virtuozzo node, guaranteed bandwidth for each Container is set to a default value of 8 Kb/s. Is there a way to alter that value?
That value is hardcoded, please check Enabling Traffic Shaping for Virtuozzo Hardware Nodes
There is a feature request PBAS-24653 to make guaranteed traffic rate to be configurable from PBAS interface. It will be implemented in future PBAS versions.