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1. SNMP

SNMP(Simple Network Management Protocol, ¼òµ¥ÍøÂç¹ÜÀíЭÒé)ÓÉIETF(Internet Engineering Task Force, »¥ÁªÍø¹¤³ÌÈÎÎñ×é)¶¨Ò壬ÆäǰÉíΪÔÚNYSERNETºÍSURANETÍøÂçÉÏ¿ª·¢ºÍÓ¦ÓõÄÍøÂç¹ÜÀí¹¤¾ßSGMP¡£InternetµÄ·¢Õ¹¹ý³ÌÖУ¬É豸ÊýÁ¿ºÍÓû§ÒÔ¼¸ºÎ¼¶ÊýÔö³¤£¬ÎªÁ˹淶¹ÜÀí£¬Ñз¢ÈËÔ±¶ÔSGMP½øÐÐÁË´óÁ¿Ð޸ģ¬ÍƳöÁ˸üÊÊÓÃÓÚInternet¹ÜÀíµÄSNMP¡£SGMPÊÇTCP/IP¿ò¼ÜÍøÂçµÄרÓùÜÀí¹¤¾ß£¬ÔçÆÚSNMPͬÑùÓÃÓÚTCP/IP¿ò¼ÜÍøÂçµÄ¹ÜÀí¡£


1.1 SNMPµÄÌØµã

SNMP±¾ÉíÖ»ÊÇIETFÖÆ¶¨µÄÁÙʱ½â¾ö·½°¸£¬Ëü¾ßÓÐÒÔÏÂÌØµã¡£

(1)¹ÜÀíÐÅÏ¢½á¹¹(SMI)ÒÔ¼°¹ÜÀíÐÅÏ¢¿â(MIB)·Ç³£¼òµ¥£¬À©Õ¹ÐԺá¢ÈÝÒ×ʵÏÖ¡¢³É±¾µÍ¡£

(2)¿É¹ÜÀí¾ø´ó²¿·Ö·ûºÏInternet±ê×¼µÄÉ豸£¬ÉìËõÐԺá£

(3)±»¹ÜÉ豸¹ÊÕÏ»ò´íÎó²»»áÓ°Ïì¹ÜÀíÕßµÄÕý³£¹¤×÷¡£

ÒòÒÔÉÏÌØµã£¬SNMPµÃÒÔѸËÙ·¢Õ¹£¬²¢Êܵ½¹ã·ºµÄÖ§³Ö£¬³ÉÎªÍøÂç¹ÜÀí·½ÃæÊÂʵÉϵıê×¼¡£


1.2 SMI

¹ÜÀíÐÅÏ¢½á¹¹( Structure of Management Information,SMI)ÓÃÓÚ¶¨ÒåMIBÖйÜÀíÐÅÏ¢µÄÓï·¨ºÍÓïÒ壬ʵÏÖÒì¹¹¼ÆËã»úÖÐÊý¾ÝÏîµÄÏàͬ±íʾ¡£ËüÖ»ÔÊÐí´æ´¢±êÁ¿ºÍ¶þάÊý×é(±í¶ÔÏó),²»Ö§³Ö¸´ÔÓµÄÊý¾Ý½á¹¹£¬¼ò»¯ÁËʵÏÖÄѶÈ£¬¼ÓÇ¿ÁË»¥²Ù×÷ÐÔ¡£

ΪÂú×ãЭͬ²Ù×÷µÄÒªÇó£¬SMI ÌṩÁËÒÔϱê×¼»¯¼¼ÊõÓÃÒÔ±íʾ¹ÜÀíÐÅÏ¢:

(1) ÉùÃ÷¶¨ÒåºÍʶ±ðMIB¶ÔÏóµÄ¹æÔò;

(2) ¶¨ÒåMIBµÄ²ã´Î½á¹¹;

(3) ¹æ¶¨MIB¶ÔÏóÖµµÄ±àÂë·½·¨¡£


1.3 MIB

¹ÜÀíÐÅÏ¢¿â(MIB)ÊDZ»¹Ü¶ÔÏóµÄ¼¯ºÏ¡£Ê¹ÓÃSNMPµÄ¹ÜÀí»·¾³ÖУ¬ËùÓб»¹Ü¶ÔÏó¶¼°´²ã´ÎÐԵĽṹ»òÊ÷×´½á¹¹ÅÅÁУ¬Ê÷½á¹¹¶Ë½Úµã¶ÔÏóÊÇʵ¼ÊµÄ±»¹Ü¶ÔÏó£¬Ã¿Ò»¸ö¶ÔÏó¶¼´ú±íһЩ×ÊÔ´¡¢»î¶¯»òÆäËû¹ÜÀíÐÅÏ¢;Ê÷×´½á¹¹±¾Éí¶¨ÒåÁËÈçºÎ½«¶ÔÏó×éÖ¯³ÉÂß¼­Ïà¹ØµÄ¼¯ºÏ¡£¹ÜÀíÐÅÏ¢¿âµÄ²¿·Ö½á¹¹ÈçÏÂͼËùʾ¡£

MIB½á¹¹Ê¾Àý

ÉÏͼËùʾµÄMIB½á¹¹ÓÖ³ÆÎª¶ÔÏóÃüÃûÊ÷(Object Naming Tree),ͨ¹ý´Ë½á¹¹ÖÐÔ̺¬µÄ¶ÔÏó¼äµÄÂß¼­¹ØÏµ£¬¿Éʹ¹ÜÀíÆ½Ì¨Í¨¹ý¶ÔÏóʶ±ð·û(Object ldentifier Desendant, OID)ÕâÖÖ¼ò½à¶øÓÖ·½±ãµÄ·½Ê½Ê¶±ðMIBÖеı»¹Ü¶ÔÏó¡£

ÉÏͼÖеĽڵãmib-2ΪÀý£¬¿Éͨ¹ý·ÖÖ§Ãû.iso.org.dod.internet.mgmt.mib-2£¬»òÊý×Ö±êʶ·û.1.3.6.1.2.1·ÃÎÊÆä±êʶµÄ¶ÔÏ󣬴ó¶àÊý¹ÜÀíÆ½Ì¨¶¼ÔÊÐíÒÔÕâÁ½ÖÖ±íʾ·½·¨À´±íʾºÍ¹ÜÀíMIB¶ÔÏó¡£


1.4 SNMPµÄ¹¤×÷»úÖÆ

SNMPÊÇ»ùÓÚTCP/IPЭÒé´ØµÄÍøÂç¹ÜÀí±ê×¼£¬ÊÇÒ»ÖÖÔÚÍøÂçÖйÜÀíÍøÂç½Úµã(Èç·þÎñÆ÷¡¢¹¤×÷Õ¾¡¢Â·ÓÉÆ÷¡¢½»»»»úµÈ)µÄ±ê׼ЭÒé¡£ÔÚʵ¼Ê¹ÜÀíÖУ¬SNMPΪ¹ÜÀíÔ±Ìṩһ¸öÍø¹Üƽ̨£¬¹ÜÀíÔ±¿Éͨ¹ýÍø¹Üƽ̨ʵÏÖÃüÁî·¢ËÍ¡¢Êý¾ÝÊÕ¼¯¡¢Êý¾Ý´æ´¢ºÍÊý¾Ý·ÖÎö;ÔÚ±»¹ÜÉ豸ÉÏÔËÐиöSNMP´úÀí(¼´Agent),ͨ¹ý´úÀíʵÏÖ±¾µØÊý¾Ý²É¼¯ÒÔ¼°Óë¹ÜÀíÆ½Ì¨µÄSNMPͨÐÅ£¬ÈçÏÂͼËùʾ¡£

SNMP¹¤×÷»úÖÆ

1.5 SNMPµÄÊý¾ÝÊÕ¼¯·½Ê½

±»¹ÜÉ豸ÖеÄSNMP´úÀí³ÖÐø²É¼¯Êý¾Ý£¬½«Êý¾Ý´æ´¢µ½µ±µØµÄMIBÖС£SNMPÌṩÁËÁ½ÖÖͨ¹ý´úÀí´Ó±»¹ÜÉ豸ÖÐÊÕ¼¯Êý¾ÝµÄ·½Ê½£¬Ò»ÖÖ·½Ê½»ùÓÚÂÖѯ£¬ÁíÒ»ÖÖ·½Ê½»ùÓÚÖжÏ¡£

Íø¹ÜϵͳÏò±»¹ÜÉ豸ÒÀ´Î·¢Æð²éѯÇëÇó£¬ÒÔ»ñÈ¡±»¹ÜÉ豸ÔÚijһʱ¿ÌµÄÊý¾ÝÐÅÏ¢;ΪÁË·ÖÎö±»¹ÜÉ豸ÖÐͨÐÅÁ÷Á¿ºÍ±ä»¯ÂÊ£¬Íø¹ÜϵͳÓÖ»á·Öʱ¼äƬ¶¨Ê±²éѯ±»¹ÜÉ豸ÖеÄÊý¾Ý¡£ÕâÑùµÄ²Ù×÷·½Ê½¼´ÎªÂÖѯ(polling-only),ÈçÏÂͼËùʾ¡£

ÂÖѯ

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»ùÓÚÖжϵÄÊý¾ÝÊÕ¼¯·½Ê½½â¾öÁËÂÖѯµÄÖ÷ҪȱÏÝ£¬µ«´ËÖÖ·½Ê½Ò²²»¹»ÍêÉÆ¡£²úÉú´íÎó»òÒ쳣ʼþÐèÒªÏûºÄϵͳ×ÊÔ´£¬Èô´íÎó»òÒì³£ÐèҪת·¢´óÁ¿ÐÅÏ¢£¬±»¹ÜÉ豸½«²»µÃ²»ÏûºÄ´óÁ¿ÏµÍ³×ÊÔ´£¬Õâ»áÓ°Ïìµ½ÍøÂç¹ÜÀíµÄÖ÷Òª¹¦ÄÜ¡£

¿Ë·þ»ùÓÚÖжϵÄÊý¾ÝÊÕ¼¯·½·¨È±µãµÄ·½Ê½ÊÇ:Ϊ±»¹ÜÉ豸ÉèÖÃãÐÖµ£¬µ±SNMP´úÀí²É¼¯µ½µÄÊý¾Ý´ïµ½ãÐֵʱ¼°Ê±·¢ËÍ֪ͨ£¬±ÜÃâÒò¿ÉÄܲúÉúµÄÖж϶øºÄ·ÑµÄϵͳ×ÊÔ´¡£Êµ¼ÊSNMPÓ¦ÓÃÖÐÍùÍùÊǽ«ÒÔÉÏÁ½ÖÖ·½Ê½½áºÏ£¬¼È±£Ö¤Êý¾Ý²É¼¯µÄÈ«ÃæÐÔ£¬ÓÖ±£Ö¤¼°Ê±²É¼¯µ½´íÎóºÍÒì³£ÐÅÏ¢¡£


1.6 SNMPµÄ»ù±¾¹ÜÀí²Ù×÷

»ùÓÚSNMPµÄÍøÂç¹ÜÀíʵ¼ÊÉϾÍÊǶÔMIB¶ÔÏóʵÀýÖµµÄ¹ÜÀí£¬Æä¹ÜÀíÖ÷Òª·ÖΪֵµÄ¶ÁÈ¡ºÍÖØÉè¡£SNMPÖжÔÍâÌṩÁË3ÖÖ¹ÜÀíMIB¶ÔÏóµÄ»ù±¾²Ù×÷ÃüÁ·Ö±ðΪget¡¢setºÍtrap¡£

(1) get:Íø¹Üϵͳ¿Éͨ¹ý¸Ã²Ù×÷ÃüÁî¶ÁÈ¡MIB¶ÔÏóʵÀýµÄÖµ£¬¸ÃÃüÁîÊÇSNMPÖÐ×ʹÓõÄÃüÁÊÇ´ÓÍøÂçÉ豸ÖлñÈ¡¹ÜÀíÐÅÏ¢µÄ»ù±¾·½Ê½¡£²ÉÓÃget ÃüÁî»ñÈ¡µÄÊý¾Ýͨ³£ÓÉ·þÎñÆ÷µÄ161¶Ë¿Ú½ÓÊÕ¡£

(2) set:Íø¹Üϵͳ¿Éͨ¹ý¸ÃÃüÁîÉèÖÃMIB¶ÔÏóʵÀýµÄÖµ£¬ÒԸı䱻¹ÜÉ豸µÄÅäÖûò¿ØÖÆÉ豸µÄÔËÐÐ״̬¡£

(3) trap: SNMP´úÀí¿Éͨ¹ý¸ÃÃüÁîÖ÷¶¯Ïò¹ÜÀíÕ¾·¢ËÍ֪ͨ¡£ÈôÓÐÒì³£²úÉú£¬SNMP´úÀí»áÏò¹ÜÀíÕ¾µÄ162¶Ë¿Ú·¢ËÍÏûÏ¢£¬Í¨Öª·þÎñÆ÷¼°Ê±¶ÔÒì³£×ö³ö·´Ó¦¡£trapÃüÁî¿ÉÓÃÀ´Í¨Öª¹ÜÀíÕ¾Ïß·µÄ¹ÊÕÏ¡¢Á¬½ÓµÄÖжϺͻָ´¡¢ÈÏ֤ʧ°ÜµÈÏûÏ¢¡£


2. CMIS/CMIP

CMIS/CMIPÓÉISOÖÆ¶¨£¬ÊÇÓÃÓÚOSIÄ£Ð͵ÄÍøÂç¹ÜÀíЭÒé´Ø£¬ÆäÖÐCMIS(Commom Management Information Service,¹«¹²¹ÜÀíÐÅÏ¢·þÎñ)Ö§³Ö¹ÜÀí½ø³ÌºÍ¹ÜÀí´úÀíÖ®¼äµÄͨÐÅÒªÇó£¬CMIP(Common Management Information Protocol)Ìṩ¹ÜÀíÐÅÏ¢·þÎñµÄÓ¦ÓòãЭÒ飬¶þÕ߹涨ÁËOSIϵͳµÄÍøÂç¹ÜÀí±ê×¼¡£

SNMPÊÇÔÚ¼òµ¥ºÍÒ×ÓÚʵÏÖµÄÔ­ÔòÏÂÉè¼ÆµÄ£¬ÆäʵÏÖ²»¹»ÍêÉÆ£¬´æÔÚ²»ÄÜÓÐЧ´«ËÍ´ó¿éÊý¾Ý¡¢²»Äܽ«ÍøÂç¹ÜÀí¹¦ÄÜ·ÖÉ¢»¯¡¢°²È«ÐÔ²»¹»ºÃµÈȱµã¡£20ÊÀ¼Í80Äê´úÄ©£¬ÈËÃÇÔÚSNMPµÄ»ù´¡ÉϽøÐÐÁË´óÁ¿¸Ä½ø£¬ÍƳöÁËCMIP£¬²¢Ï£ÍûʹÓøÃЭÒé´úÌæSNMP¡£

ÓëSNMPÏà±È£¬CMIPµÄÍ»³öÓÅÊÆÊÇÆäʹÓõıäÁ¿¼ÈÄÜÏñSNMPÄÇÑùÔÚÍøÂç¹ÜÀíϵͳºÍ±»¹ÜÉ豸֮¼ä´«µÝÐÅÏ¢£¬ÓÖÄܱ»ÓÃÀ´Ö´Ðи÷ÖÖÓÚSNMPÖв»¿ÉÄÜʵÏÖµÄÈÎÎñ;´ËÍ⣬CMIPÖÐÄÚÖÃÁ˰²È«¹ÜÀíÉ豸£¬Ö§³ÖÑéÖ¤¡¢·ÃÎÊ¿ØÖƺͰ²È«ÈÕÖ¾µÈ°²È«·À·¶´ëÊ©£¬Ê¹CMIP±¾Éí¾ß±¸Á˰²È«ÐÔÄÜ¡£µ«CMIPÕ¼ÓõÄÍøÂç×ÊÔ´Ï൱ÓÚSNMPµÄ10±¶£¬ËüËäÈ»×ã¹»Ïêϸ£¬Ò²Ï൱¸´ÔÓ£¬Òò´ËCMIP²¢Î´µÃµ½Êµ¼ÊÓ¦Óá£



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