EIR and EBS accommodate traffic that exceeds the conditions of the committed information rate (CIR) and the committed burst size (CBS). EIR is the maximum sustained rate at which inbound and outbound traffic can exceed the CIR. Traffic that does not use all of its allotted EIR accumulates credit (bandwidth) up to the amount defined by the EBS. This accumulated bandwidth can be used to accommodate temporary bursts of traffic that exceeds the EIR. Inbound or outbound traffic that exceeds the amount of accumulated bandwidth is dropped.