What Happen to my Network

Question

HI All!
10xs for ur time to help me.but no body tell me why this problem occured{server no pingable;loop;duplicate ip address,this ipsubnet that appeared not exist IN MY Network;all access Switchs in the Enterprise down}its possible if the mode is desirable on the access switch;and mode is on on the core side;did all these problem.
PS,PS I NEED EXPLANATION WHAT HAPPEN.from the Cisco Expert.
10XS FOR UR HELP!
ALI

Answer 1

You can use syslog to send all the connection-logs to an internal server (I would use a linux-box with syslog-ng). There you have all sessions that were used through the ASA. On the server you can search or filter these logs with your native tools (grep, tail, etc.). If you need more comfort there are several commercial solutions available.
logging enable
logging timestamp
logging trap informational
logging device-id hostname
logging host inside YOUR-LOG-HOST-IP
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