Identifies the average rate (bits per second) up to which service frames are delivered as defined in the provider's service level specification.
NOTE 1: CIR is tracked for frame loss by the MEF Ethernet Operations, Administration, and Maintenance (OAM) Protocol, unlike EIR.
VALID ENTRIES: Valid CIR expressed as a numeric value followed by “K”, “M” or “G” representing Kilobits, Megabits or Gigabits per second respectively.
USAGE: This field is conditional.
NOTE 1: Optional when the associated LREF field is populated and the LOSACT is not "D", otherwise prohibited.
DATA CHARACTERISTICS: 7 alpha / numeric characters
EXAMPLES: 1 6 K
1 . 0 8 G
1 0 . 8 0 8 M