SummaryGlobal QoS, used for link aggregation, cannot be used with Dynamic Virtual Circuits due to technological limitations in the Exinda appliance
OverviewLink aggregation is a common technology that provides the ability to logically link together multiple physical links to increase bandwidth and reliability in case of failure. The Exinda appliances can support link aggregation as long as Global QoS is enabled (Configuration > System > Setup, the "Control" tab). Without enabling Global QoS, the policy set on the Exinda will be applied independently to each bridge - that is, a copy of each will be made and applied to the different bridges so that traffic coming in will follow the policy set on the bridge independently of another one. In the case of link aggregation, this can make it appear that 2 bridges, which are in fact sharing the same bandwidth, will think that they each have the full bandwidth isolated to themselves, which is inherently not the case in link aggregation.
Global QoS shares one policy set across all the bridges, so that links that share a full bandwidth will know accordingly which bandwidth is used and which there is remaining.
However, Global QoS cannot work if there is Dynamic Virtual Circuits in the policy tree. The message "Global QoS cannot be applied as there are Dynamic Virtual Circuits" will show up in the logs.