定义cisco设备的log级别
如果你是一名网络运维工程师，那cisco网络设备告警信息相信是你最关心的了，但并不是所有的log都是你关心的，如何才能定制你需要的log 级别呢，cisco的设备log是可以选择的下面是配置命令，选择你需要的配置上吧
site1(config)#logging buffered ?
<0-7> Logging severity level
<4096-2147483647> Logging buffer> alerts Immediate action needed (severity=1)
critical Critical conditions (severity=2)
debugging Debugging messages (severity=7)
emergencies System is unusable (severity=0)
errors Error conditions (severity=3)
filtered Enable filtered logging
informational Informational messages (severity=6)
notifications Normal but significant conditions (severity=5)
warnings Warning conditions (severity=4)
xml Enable logging in XML to XML logging buffer
我一般在非核心使用的是notifications 这个级别，核心设备使用informational
比如我要配置一个logging级别是6（informational），并指定源接口，和syslog服务器地址
site1(config)#do show log #这时我还没有指定
Syslog logging: enabled (11 messages dropped, 8 messages rate-limited,
0 flushes, 0 overruns, xml disabled, filtering disabled)
Console logging: level debugging, 48 messages logged, xml disabled,
filtering disabled
Monitor logging: level debugging, 0 messages logged, xml disabled,
filtering disabled
Buffer logging: level notifications, 0 messages logged, xml disabled,
filtering disabled
Logging Exception> Count and timestamp logging messages: disabled
No active filter modules.
Trap logging: level informational, 59 message lines logged
site1(config)#logging buffered informational
site1(config)# logging host 1.1.1.2
site1(config)#logging source-interface loopback 0
下面检查log级别是不是我所指定的
site1#show logging
Syslog logging: enabled (11 messages dropped, 8 messages rate-limited,
0 flushes, 0 overruns, xml disabled, filtering disabled)
Console logging: level debugging, 52 messages logged, xml disabled,
filtering disabled
Monitor logging: level debugging, 0 messages logged, xml disabled,
filtering disabled
Buffer logging: level informational, 3 messages logged, xml disabled, #级别已经改为informational了
filtering disabled
Logging Exception> Count and timestamp logging messages: disabled
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