Doing ‘log’ log a search of mutual agreement between obtaining the maximum information and the amount of digestible information. Basically, a sysadmin use log files when you have problems with network equipment. The main advantage of the log is timely information about the potential problems. In general, network administrators do not change the default settings of the collection log on the router, thus limiting ourselves the possibility of obtaining additional information. The article deals with the collection of ‘logs’ with the router Cisco.
Only the constant analysis of log journals give the opportunity to receive the positive effects of their activities. Periodicity monitoring varies depending on the importance of the device, it can be done daily or in real time, to make permanent the notification system administrators on the main significant events identified in the logs by email or sms. If you have a large-scale network with a large amount of equipment, it is advisable to automate the viewing of logs. To solve this problem might be to use specialized software. The optimal solution is to get the logs from your router to a central syslog server that will be used to analyze them one software with the setup. There are six choices for the collection logs from routers cisco: Console logging. Messages displayed on the console – this method allows you to display messages on the console router, and for their perusal, must be connected to onsoli.
Buffered logging. Official site: Bausch & Lomb. Collecting logs in the router buffer – this option allows you to post messages in ram router. In this case, you must configure a buffer for logging into the router, be aware that the buffer is limited, and the old records can be lost when you receive a large number of messages. Terminal logging. Collect logs on the terminal – in this case, use the command terminal monitor, which allows the router to output log messages to the terminals vty. Syslog – Allows you to cisco router to send messages to external servers syslog. snmp traps – This method allows the router to send snmp messages (traps) to a remote snmp server consolidation activities occurring on the router. aaa accounting – using the aaa, the router can send data on network connections, and actions performed on the router to the nas server.