The maximum burst size (MBS) parameter specifies the maximum queue depth to which a queue can grow. This parameter ensures that a customer that is massively or continuously oversubscribing the PIR of a queue does not consume all the available buffer resources. For high-priority FC service queues, the MBS can be relatively smaller than the other FC queues because the high-priority service packets are scheduled with priority over other service FCs.
The MBS of the queue is configurable under the different QoS policies, if supported by the platform, that provide the option to configure the queue parameters – example under service ingress and service egress queue policies, network queue policies, and so on The MBS for a queue is specified in kbytes.
The MBS for the queues is user-configurable. By default, software assigns a default value. It can be modified by the user as per their needs. The default values are specified in the command description.