Add Ring

setAddRingMode -ring_target default -extend_over_row 0 -ignore_rows 0 -avoid_short 0 -skip_crossing_trunks none -stacked_via_top_layer Metal9 -stacked_via_bottom_layer Metal1 -via_using_exact_crossover_size 1 -orthogonal_only true -skip_via_on_pin {  standardcell } -skip_via_on_wire_shape {  noshape }
addRing -nets {VDD VSS} -type core_rings -follow core -layer {top Metal1 bottom Metal1 left Metal2 right Metal2} -width {top 0.5 bottom 0.5 left 0.5 right 0.5} -spacing {top 0.1 bottom 0.1 left 0.15 right 0.15} -offset {top 0.5 bottom 0.5 left 0.5 right 0.5} -center 0 -extend_corner {} -threshold 0 -jog_distance 0 -snap_wire_center_to_grid None
setAddRingMode -ring_target default -extend_over_row 0 -ignore_rows 0 -avoid_short 0 -skip_crossing_trunks none -stacked_via_top_layer Metal9 -stacked_via_bottom_layer Metal1 -via_using_exact_crossover_size 1 -orthogonal_only true -skip_via_on_pin {  standardcell } -skip_via_on_wire_shape {  noshape }
addRing -nets {VDD VSS} -type core_rings -follow core -layer {top Metal1 bottom Metal1 left Metal2 right Metal2} -width {top 0.5 bottom 0.5 left 0.5 right 0.5} -spacing {top 0.1 bottom 0.1 left 0.15 right 0.15} -offset {top 0.5 bottom 0.5 left 0.5 right 0.5} -center 0 -extend_corner {} -threshold 0 -jog_distance 0 -snap_wire_center_to_grid None