https://plone.lucidsolutions.co.nz/networking/cisco/ios/logging-to-a-syslog-or-rsyslog-host-from-cisco-ios
http://www.ciscopress.com/articles/article.asp?p=426638&seqNum=3
http://www.linuxuser.co.uk/tutorials/send-cisco-logs-to-a-remote-machine
http://searchnetworking.techtarget.com/tip/Router-Expert-Using-Cisco-IOS-logging-part-2
