This read-only display string lists, dot-delimited, exactly which physical links are currently members of an IMA group, with each link's position in the string reflecting its order in the round-robin cell-multiplexing sequence. An administrator uses this to see which specific physical lines are contributing to the aggregated IMA bandwidth and in what sequence cells are being distributed across them. For example, a value like "1.2.4" tells the admin that links 1, 2, and 4 are active in the group (link 3 is absent), and cells are being multiplexed across them in that listed order.