John, you can go to this link and reference the syslog messages, generally devices generate messages either for informational purposes or error reporting based on how the device is configured for loggin facility levels. The link bellow is for referecing error messages but not all messages could be errors, it is up to the network admin to not only look at logs but the whole network footprint issues, logs just helps in giving initial startup in deciphering issues if any.
Are there any issues in your network affecting production. Looking at some of the lines in your attached file some should be looked at.
http://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi
HTH
Jorge
Jorge Rodriguez