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The network shaping (setting limit on the available bandwidth for outgoing traffic) is generally defined for each Container on the given Hardware Node on the Configure Shaping page in Parallels Infrastructure Manager. The Traffic Shaping page (which you can access by following the Configure Traffic Shaping link on the Configuration tab of the Container dashboard) allows you to redefine some of the shaping parameters for the given particular Container.
Virtuozzo network bandwidth management works in the following way. The bandwidth pool for a given network class (indicated on the page as Bandwidth for each network adapter) is divided among the Containers transmitting data proportionally to their Rate Guarantee settings. The global Rate Guarantee setting is defined on the Configure Shaping page, but can be redefined here in the Container Rate Guarantee field for this given Container. If the total value of the rate guarantees of all Containers transmitting data does not exceed the bandwidth pool value, each Container gets the bandwidth equal or greater than its rate guarantee (unless the Use Container Rate Guarantee as limit radio button is not selected on this page). If the total value of the rate guarantees of all Containers transmitting data exceeds the bandwidth pool, each Container may get less than its rate guarantee.
It is clear from the above-said that the Use class bandwidth as limit radio button lets the Container exceed its rate guarantee, if there is enough spare bandwidth in the pool, whereas the Use Container Rate Guarantee as limit does not let it do so.
Worth to mention here that each network class beginning with 2 cannot be taken into account for the network shaping of this particular Container, if the Enable shaping for this class checkbox is cleared. The default state of this option (selected or cleared) depends on what has been chosen on the Configure Shaping page.
