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µo§G®É¶¡¡G2007.09.12 05:03     ¨Ó·½¡GÁÉ­}ºô¡Ð§Þ³NªÀ°Ï    §@ªÌ¡Gnet

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1. EtherChannel misconfiguration

2. Duplex mismatch

3. BPDU port guard

4. UDLD

5. Link-flap error

6. Loopback error

7. Port security violation

1 ·íFEC¨âºÝ°t¸m¤£¤Ç°tªº®É­Ô´N·|¥X²{err-disable¡C°²³]Switch A§âFEC¼Ò¦¡°t¸m¬°on¡A³o®ÉSwitch A¬O¤£·|µo°ePAgP¥]©M¬Û³sªºSwitch B¥h¨ó°ÓFECªº¡A¥¦°²³]Switch B¤w¸g°t¸m¦nFEC¤F¡C¦ý¹ê¨Æ¤WSwtich B¨Ã¨S¦³°t¸mFEC¡A·íSwitch Bªº³o­Óª¬ºA¶W¹L1¤ÀÄÁ«á¡ASwitch AªºSTP´N»{¬°¦³Àô¸ô¥X²{¡A¦]¦¹¤]´N¥X²{¤Ferr-disable¡C¸Ñ¨M¿ìªk´N¬O§âFECªº¼Ò¦¡°t¸m¬°channel-group 1 mode desirable non-silent³o­Ó·N«ä¬O¥u¦³·íÂù¤èªºFEC¨ó°Ó¦¨¥\«á¤~«Ø¥ßchannel¡A§_«h¤¶­±ÁÙ³B©ó¥¿±`ª¬ºA¡C

2 ²Ä¤G­Ó­ì¦]´N¬OÂù¤u¤£¤Ç°t¡C¤@ºÝ°t¸m¬°half-duplex«á¡A¥L·|ÀË´ú¹ïºÝ¬O§_¦b¶Ç¿é¼Æ¾Ú¡A¥u¦³¹ïºÝ°±¤î¶Ç¿é¼Æ¾Ú¡A¥L¤~·|µo°eÃþ¦ü¤_ackªº¥]¨ÓÅýÃì¸ôup¡A¦ý¹ïºÝ«o°t¸m¦¨¤Ffull-duplex¡A¥L¤~¤£ºÞÃì¸ô¬O§_¬OªÅ¶¢ªº¡A¥L¥u·|¤£°±ªºµo°eÅýÃì¸ôupªº½Ð¨D¡A³o¼Ë¤U¥h¡AÃì¸ôª¬ºA´NÅܦ¨err-disable¤F¡C

3 ²Ä¤T­Ó­ì¦]BPDU¡A¤]´N¬O©Mportfast©MBPDU guard¦³Ãö¡C¦pªG¤@­Ó¤¶­±°t¸m¤Fportfast¡A¨º¤]´N¬O»¡³o­Ó¤¶­±À³¸Ó©M¤@­Ópc³s±µ¡Apc¬O¤£·|µo°espanning-treeªºBPDU´Vªº¡A¦]¦¹³o­Ó¤f¤]±µ¦¬BPDU¨Ó¥Í¦¨spanning-tree¡AºÞ²z­û¤]¬O¥X©ó¦n¤ß¦b¦P¤@¤¶­±¤W°t¸m¤FBPDU guard¨Ó¨¾¤î¥¼ª¾ªºBPDU´V¥H¼W±j¦w¥þ©Ê¡A¦ý¥L«ê«ê¤£¤p¤ß§â¤@­Ó¥æ´«¾÷±µ¨ì³o­Ó¦P®É°t¸m¤Fportfast©MBPDU guard¤¶­±¤W¡A©ó¬O³o­Ó¤¶­±±µ¨ì¤FBPDU´V¡A¦]¬°°t¸m¤FBPDU guard¡A³o­Ó¤¶­±¦ÛµM­n¶i¤J¨ìerr-disableª¬ºA¡C¸Ñ¨M¿ìªk¡Gno spanning-tree portfast bpduguard default¡A©ÎªÌª½±µ§âportfastÃö¤F¡C

4 ²Ä¥|­Ó­ì¦]¬OUDLD¡CUDLD¬Ociscoªº¨p¦³2¼h¨óij¡A¥Î©óÀË´úÃì¸ôªº³æ¦V°ÝÃD¡C¦³ªº®É­Ôª«²z¼h¬Oupªº¡A¦ýÃì¸ô¼h´N¬Odown¡A³o®É­Ô´N»Ý­nUDLD¥hÀË´úÃì¸ô¬O§_¬O¯uªºupªº¡C·íAB¨âºÝ³£°t¸m¦nUDLD«á¡AAµ¹Bµo°e¤@­Ó¥]§t¦Û¤vport idªºUDLD´V¡AB¦¬¨ì«á·|ªð¦^¤@­ÓUDLD´V¡A¨Ã¦b¨ä¤¤¥]§t¤F¦¬¨ìªºAªºport id¡A·íA±µ¦¬¨ì³o­Ó´V¨Öµo²{¦Û¤vªºport id¤]¦b¨ä¤¤«á¡A»{¬°³oÃì¸ô¬O¦nªº¡C¤Ï¤§´NÅܦ¨err-disableª¬ºA¤F¡C°²³]A°t¸m¤FUDLD¡A¦ÓB¨S¦³°t¸mUDLD¡GAµ¹Bµo°e¤@­Ó¥]§t¦Û¤vport idªº´V¡AB¦¬¨ì«á¨Ã¤£ª¾¹D³o­Ó´V¬O¤°»ò¡A¤]´N¤£·|ªð¦^¤@­Ó¥]§tAªºport idªºUDLD´V¡A¨º»ò³o®É­ÔA´N»{¬°³o±øÃì¸ô¬O¤@­Ó³æ¦VÃì¸ô¡A¦ÛµM¤]´NÅܦ¨err-disableª¬ºA¤F¡C

5 ²Ä¤­­Ó­ì¦]´N¬OÃì¸ôªº§Ý°Ê¡A·íÃì¸ô¦b10¬í¤º¤Ï´_up¡Bdown¤­¦¸¡A¨º»ò´N¶i¤Jerr-disableª¬ºA¡C

6 ²Ä¤»­Ó­ì¦]´N¬Okeepalive loopback¡C¦b12.1EA¤§«e¡AÀq»{±¡ªp¤U¥æ´«¾÷·|¦b©Ò¦³¤¶­±³£µo°ekeepalive¸ê°T¡A¥Ñ©ó¤@¨Ç¤£³q¥æ´«¾÷¨ó°Óspanning-tree¥i¯à·|¦³°ÝÃD¡A¤@­Ó¤¶­±¤S¦¬¨ì¤F¦Û¤vµo¥Xªºkeepalive¡A¨º»ò³o­Ó¤¶­±´N·|Åܦ¨err-disable¤F¡C¸Ñ¨M¿ìªk´N¬O§âkeepaliveÃö¤F¡C©ÎªÌ§âios¤É¨ì12.2SE

7 ³Ì«á¤@­Ó­ì¦]¡A¬Û¹ï²³æ¡A´N¬O¥Ñ©ó°t¸m¤Fport-security violation shutdown¡C

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