| 摘要 |
The frame switching unit 630 has the frame analysis unit 700, the frame rewriting unit 710, the frame transfer unit 720, the table search unit 730, the forwarding table 740, the MAC learning unit 750, the control frame distribution unit 760, the setting control unit 790, the STP control unit 780 which, when receiving a topology change message, converts an LT flag from 0 to 1 to indicate an entry as of before switching to leave the entry in the table, and the OAM control unit 770 which, upon an LT execution request before failure switching, transfers an LT frame according an output port in an entry whose LT flag is 1 among entries in the forwarding table 740. |
