l2fwd_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
t->sw_if_index = sw_if_index0;
t->bd_index = vnet_buffer (b[0])->l2.bd_index;
l2fwd_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
t->sw_if_index = sw_if_index0;
t->bd_index = vnet_buffer (b[0])->l2.bd_index;