流量监控的几种方法.doc

流量监控的几种方法.txt-一人行,必会发情二人行,必会激情三人行,必有奸情就不会被珍惜。真实的女孩不完美，完美的女孩不真实。得之坦然，失之淡然，顺其自然，争其必然。一、ip accounting 1、配置方法 router(config)#int s 0/0 router(config-if)#ip accounting output-packets router#sh ip accounting output-packets Source Destination Packets Bytes 10 7 5 500 172.17.246. 128 10 8 704 Accounting data age is 2d23h 或者 router(config)#int s 0/0 router(config-if)#ip accounting access-violations router#sh ip accounting checkpoint access-violations Source Destination Packets Bytes ACL 10 46 3128 19 Accounting data age is 7 2、说明 此方法如果在路由器负载特大的时候请谨慎使用，因其会使系统性能下降 基于地址对的字节数量及数据包数量统计 通常只支持outbound的数据包，及被ACL拒绝的数据包（支持IN 和 OUT方向的ACL） 只统计穿越路由器的流量，源或目的是该路由器的数据包不做统计 支持所有的switching path，除了Autonomous Switching 可以通过SNMP来访问统计值，MIB是OLD-CISCO-IP-MIB, lipAccountingTable ip accounting还支持其他的监测方式，如基于tos,mac-address等 二、netflow 1、配置方法 router (config-if)#ip route-cache flow router (config)#ip flow-export destination 25 9996 router (config)#ip flow-export version 5 Optional configuration router (config)#ip flow-export source loopback 0 router (config)#ip flow-cache entries router (config)#ip flow-cache timeout sh ip cache flow IP packet size distribution (132429191 total packets): 1-32 64 96 128 160 192 224 256 288 320 352 384 416 448 480 .000 .191 .024 .009 .010 .006 .005 .008 .003 .005 .003 .003 .002 .001 .001 512 544 576 1024 1536 2048 2560 3072 3584 4096 4608 .001 .002 .107 .032 .578 .000 .000 .000 .000 .000 .000 IP Flow Switching Cache, 278544 bytes 33 active, 4063 inactive, 7975259 added 104834714 ager polls, 0 flow alloc failures Active flows timeout in 30 minutes Inactive flows timeout in 15 seconds last clearing of statistics never Protocol Total Flows Packets Bytes Packets Active(Sec) Idle(Sec) - Flows /Sec /Flow /Pkt /Sec /Flow /Flow TCP-Telnet 25378 0.0 12 652 0.0 22.9 15.2 TCP-FTP 432435 0.1 4 59 0.4 1.2 2.7 TCP-FTPD 28670 0.0 212 1397 1.4 8.2 1.6 TCP-WWW 4682530 1.0 15 927 16.4 2.4 4.6 2、说明 统计基于流（包括地址对、端口号、协议类型等）的数据量 只支持inbound的流量 只支持单播 只能在主端口配置 需要和cef或fast switching一起使用 对路由器性能有影响 10,000 active flows: sh log Syslog logging: enabled (0 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns) Console logging: level debugging, 79 messages logged Monitor logging: level debugging, 0 messages logged Buffer logging: level debugging, 79 messages logged Logging Exception size (4096 bytes) Trap logging: level informational, 83 message lines logged Log Buffer (4096 bytes): *May 25 05:27:50: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 1(0) - (0), 1 packet *May 25 05:28:59: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 1(0) - 28(0), 1 packet *May 25 05:29:19: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 10.1.64