This read-write INTEGER (enabled(1)/disabled(2), defaulting to disabled) applies only to Token Ring ports and, when enabled on both the entry and exit ports, allows frames to be bridged between Token Ring ports on the same board at higher throughput and lower latency, though address statistics will not reflect frames forwarded this way. An administrator enables it purely for a performance gain on same-board Token Ring bridging, accepting reduced statistical visibility as the trade-off. For example, the admin enables sifFrameSwitching on two Token Ring ports on the same board to speed up inter-port bridging, accepting that per-address stats won't capture those particular frames.