question on logging levels??

hello to you all cisco gurus!

i was just reading about the logging today
and found out that there are 7 levels to it.

my question is if i set the level to 4 what is
that going to log? what does each level going to
log? for example, if i want to log the down state of my
wan interface, which level of logging i need to
configure?

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ConstantlyLearning

Get to know your logging options in the Cisco IOS

* 0—emergencies
* 1—alerts
* 2—critical
* 3—errors
* 4—warnings
* 5—notification
* 6—informational
* 7—debugging

Setting level 4 will log warnings, errors, critical, alerts and emergencies.

Level 3 will let you know if the interface goes down
Level 5 will let you know if the line protocol on the interface goes down and if the interface goes down.

I tested what levels log the interface down messages by using the global config command "logging console [Level]". I started at level 0, disconnected and reconnected a cable and continued up the levels.
I did this on a 2950 switch.

chrisone

Also if you choose Level 7 or 6 , it will log the lower levels as well. So the higher will include the numbers below as well. You also need to set this up either on a log server or locally on the buffer.

opps didnt see the user above me already posted the link...

Forsaken_GA

these also equate to unix syslog levels

one of the nice things is that you can use something like syslog-ng to capture each level and log it to it's own log. It's a whole lot easier to write software that can react to new entries in a level3 log than to have to parse the entire log file