This is the DLCI value identifying this Frame Relay circuit at its source end, with the exact meaning -- local or remote DLCI -- depending on whether the network uses local or global DLCI addressing. An admin matching up a circuit a customer reports as down ('my DLCI 100 is down') to this switch's internal circuit table needs to know which addressing mode is in effect to look in the right column. For example, on a globally-addressed Frame Relay network, cktSrcDlci showing 100 actually represents the remote end's DLCI as seen from this switch's perspective, not the number configured on the local CPE.