vRtrIgmpIfMcacinUseOpnlBw 1.3.6.1.4.1.6527.3.1.2.23.2.1.1.21

The value of vRtrIgmpIfMcacinUseOpnlBw indicates the in-use bandwidth in kilo-bits per second(kbps) for the optional channels for this protocol interface instance.