Authenication Failure

[sknorr]

This is a trap I receive from one of my 3800 routers. I don't understand what type of authenication it's refering to?

EVENT ID = 00002XO

ALERT ID = 00000RY

TIME = Thu 13-Oct-2005 08:19:56 EDT

STATUS = Active

SEVERITY = Informational

MANAGED OBJECT = 172.20.11.1

MANAGED OBJECT TYPE = Routers

EVENT DESCRIPTION = MinorAlarm::Component=172.20.11.1: Authentication Failure;

[nhabib]

It could be an SNMP query with the wrong community string

Issue the following command on the router: show snmp

and see if the Unknown community name field is increasing