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- ã«ãŒãã¹ã€ãããéžæãããŠããŸãã
- æ®ãã®ã¹ã€ããã¯ã«ãŒã ã¹ã€ãããžã®æéãã¹ã決å®ããŸãã
- æ®ãã®ãã£ãã«ã¯ãããã¯ãããããã¯ã¢ããã«ãªããŸãã
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RSTP ãåããã¹ã€ãã㯠BPDU ãã±ããã亀æããŸãã BPDU ã¯ãRSTP æ å ±ãå«ããµãŒãã¹ ãã±ããã§ãã BPDU ã«ã¯ XNUMX ã€ã®ã¿ã€ãããããŸãã
- æ§æ BPDUã
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- éä¿¡è ID (ããªããžID);
- ã«ãŒãããªããžIDã
- ãã®ãã±ããã®éä¿¡å ã®ããŒãã®èå¥å (ããŒã ID)ã
- ã«ãŒã ã¹ã€ãããžã®ã«ãŒãã®ã³ã¹ã (ã«ãŒã ãã¹ ã³ã¹ã)ã
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ã¹ã€ããããªã³ã«ãããšããã¹ãŠã®ã¹ã€ããã¯èªåèªèº«ãã«ãŒã ã¹ã€ããã§ãããšèªèããŸãã BPDU ãã±ããã®éä¿¡ãéå§ããŸãã ã¹ã€ããã¯ãèªèº«ã®ããªããž ID ãããäœãããªããž ID ãæ〠BPDU ãåä¿¡ãããšããã«ãèªåèªèº«ãã«ãŒã ã¹ã€ãããšã¯èŠãªãããªããªããŸãã
ããªããž ID ã¯ãMAC ã¢ãã¬ã¹ãšããªããžåªå 床㮠32768 ã€ã®å€ã§æ§æãããŸãã MACã¢ãã¬ã¹ã¯å€æŽã§ããŸããã ããã©ã«ãã®ããªããžåªå 床㯠0 ã§ããããªããžåªå 床ãå€æŽããªãå ŽåãMAC ã¢ãã¬ã¹ãæãå°ããã¹ã€ãããã«ãŒã ã¹ã€ããã«ãªããŸãã MAC ã¢ãã¬ã¹ãæãå°ããã¹ã€ãããæãå€ããããããã©ãŒãã³ã¹ãæãé«ããªãå¯èœæ§ããããŸãã ããããžã®ã«ãŒã ã¹ã€ãããæåã§å®çŸ©ããããšããå§ãããŸãã ãããè¡ãã«ã¯ãã«ãŒã ã¹ã€ããã§å°ããªããªããž ãã©ã€ãªãªã㣠(ããšãã°ã4096) ãèšå®ããå¿ èŠããããŸãã ããã¯ã¢ãã ã«ãŒã ã¹ã€ããã«å°ãé«ãããªããžåªå 床 (ããšãã°ãXNUMX) ãæå®ããŠãããã¯ã¢ãã ã«ãŒã ã¹ã€ãããå®çŸ©ããããšãã§ããŸãã
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ã«ãŒã ã¹ã€ããã¯ãBPDU ãã±ããããã¹ãŠã®ã¢ã¯ãã£ã ããŒãã«éä¿¡ããŸãã BPDU ã«ã¯ Path Cost ãã£ãŒã«ãããããŸãã Path Cost ã¯ããã¹ã®ã³ã¹ãã瀺ããŸãã ãã¹ã®ã³ã¹ããé«ããªãã»ã©ããã±ããã®éä¿¡ã«ãããæéãé·ããªããŸãã BPDU ãããŒããééãããšããã¹ ã³ã¹ã ãã£ãŒã«ãã«ã³ã¹ããè¿œå ãããŸãã å ç®ãããæ°å€ã¯ããŒãã³ã¹ããšåŒã°ããŸãã
BPDU ãããŒããééãããšãã«ãã¹ ã³ã¹ãã«ç¹å®ã®å€ãè¿œå ããŸãã è¿œå ãããå€ã¯ããŒã ã³ã¹ããšåŒã°ããæåãŸãã¯èªåã§æ±ºå®ã§ããŸãã ããŒãã³ã¹ãã¯æåãŸãã¯èªåã§æ±ºå®ã§ããŸãã
éã«ãŒã ã¹ã€ããã«ã«ãŒããžã®ä»£æ¿ãã¹ãè€æ°ããå Žåãæãé«éãªãã¹ãéžæãããŸãã ãããã®ãã¹ã®ãã¹ ã³ã¹ããæ¯èŒããŸãã ãã¹ ã³ã¹ããæãäœã BPDU ã®éä¿¡å ããŒããã«ãŒã ããŒãã«ãªããŸãã
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ããŒãã¹ããŒã¿ã¹ (STP ã®å Žå):
- ç¡å¹ â éã¢ã¯ãã£ãã
- ããããã³ã° â BPDU ããªãã¹ã³ããŸãããéä¿¡ã¯ããŸããã ããŒã¿ãéä¿¡ããŸããã
- ãªã¹ãã³ã° â BPDU ããªã¹ãã³ã°ããŠéä¿¡ããŸãã ããŒã¿ãéä¿¡ããŸããã
- åŠç¿ â BPDU ããªãã¹ã³ããŠéä¿¡ããŸãã ããŒã¿è»¢éã®æºå - MAC ã¢ãã¬ã¹ ããŒãã«ã«æžã蟌ã¿ãŸãã
- 転é - ããŒã¿ã転éããBPDU ããªãã¹ã³ããŠéä¿¡ããŸãã
STP ã³ã³ããŒãžã§ã³ã¹æé㯠30 ïœ 50 ç§ã§ãã ã¹ã€ããããªã³ã«ãããšããã¹ãŠã®ããŒãããã¹ãŠã®ã¹ããŒã¿ã¹ãçµãŸãã ããŒãã¯æ°ç§éãããããã®ã¹ããŒã¿ã¹ãç¶æããŸãã ãã®åäœåçããSTP ã®ã³ã³ããŒãžã§ã³ã¹æéãããã»ã©é·ãçç±ã§ãã RSTP ã®ããŒãç¶æ ã¯å°ãªããªããŸãã
ããŒãã¹ããŒã¿ã¹ (RSTP ã®å Žå):
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- ç Žæ£ â BPDU ããªãã¹ã³ããŸãããéä¿¡ã¯ããŸããã ããŒã¿ãéä¿¡ããŸããã
- ç Žæ£ â BPDU ããªãã¹ã³ããŠéä¿¡ããŸãã ããŒã¿ã¯éä¿¡ããŸããã
- åŠç¿ â BPDU ããªãã¹ã³ããŠéä¿¡ããŸãã ããŒã¿è»¢éã®æºå - MAC ã¢ãã¬ã¹ ããŒãã«ã«æžã蟌ã¿ãŸãã
- 転é - ããŒã¿ã転éããBPDU ããªãã¹ã³ããŠéä¿¡ããŸãã
- RSTP ã§ã¯ãç¡å¹ããããã¯ãããã³ãªã¹ãã³ã°ã®ã¹ããŒã¿ã¹ã XNUMX ã€ã®ç Žæ£ã«çµåãããŸãã
ããŒãã®åœ¹å²:
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- æå®ããŒã â ããŒã¿ãéä¿¡ãããããŒãã LANã»ã°ã¡ã³ãããšã«å®çŸ©ãããŸãã
- 代æ¿ããŒã â ããŒã¿ãéä¿¡ãããªãããŒãã ããã¯ãã«ãŒã ã¹ã€ãããžã®ä»£æ¿ãã¹ã§ãã
- ããã¯ã¢ãã ããŒã â ããŒã¿ã転éãããªãããŒãã RSTP 察å¿ããŒãããã§ã« XNUMX ã€æ¥ç¶ãããŠããã»ã°ã¡ã³ãã®ããã¯ã¢ãããã¹ã§ãã ããã¯ã¢ãã ããŒãã¯ãXNUMX ã€ã®ã¹ã€ãã ãã£ãã«ã XNUMX ã€ã®ã»ã°ã¡ã³ã (èªã¿åããã) ã«æ¥ç¶ãããŠããå Žåã«äœ¿çšãããŸãã
- ç¡å¹ãªããŒã - ãã®ããŒãã§ã¯ RSTP ãç¡å¹ã«ãªã£ãŠããŸãã
ã«ãŒã ããŒãã®éžæã«ã€ããŠã¯äžã§èª¬æããŸããã æå®ããŒãã¯ã©ã®ããã«éžæãããŸãã?
ãŸããLAN ã»ã°ã¡ã³ããšã¯äœããå®çŸ©ããŸãããã LAN ã»ã°ã¡ã³ãã¯ã³ãªãžã§ã³ ãã¡ã€ã³ã§ãã ã¹ã€ãããŸãã¯ã«ãŒã¿ãŒã®å ŽåãåããŒãã¯åå¥ã®ã³ãªãžã§ã³ ãã¡ã€ã³ã圢æããŸãã LAN ã»ã°ã¡ã³ãã¯ãã¹ã€ãããŸãã¯ã«ãŒã¿ãŒéã®ãã£ãã«ã§ãã ããã«ã€ããŠè©±ãå Žåãããã®ãã¹ãŠã®ããŒãã¯åãã³ãªãžã§ã³ ãã¡ã€ã³å ã«ãããŸãã
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æåŸã« XNUMX ã€ãã€ã³ãããããŸããããã¯ã¢ããã®åœ¹å²ãããŒãã«å²ãåœãŠãããã®ã¯ãã€ã§ãã? äžã§ãã§ã«èª¬æããããã«ãããã¯ã¢ãã ããŒã㯠XNUMX ã€ã®ã¹ã€ãã ãã£ãã«ãåãã»ã°ã¡ã³ããã€ãŸãããã«æ¥ç¶ãããŠããå Žåã«ã®ã¿äœ¿çšãããŸãã ãã®å Žåãæå®ããŒãã¯ãŸã£ããåãåºæºã䜿çšããŠéžæãããŸãã
- ã«ãŒã ã¹ã€ãããžã®æäœãã¹ ã³ã¹ãã
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