Serial interface DS3 state change to admin down ?? 1

[Sydgix]

Sometimes, (1-2 times a month) my interface on my 7304 Cisco router is changing to administratively down by itself ?? Anybody had this problem before ? Link it self is pretty clean (1 crc error per 2 hrs)...

 

[plshlpme]

so the router is not rebooting?
sh ver doesn't reveal any bus errors?
and what does the log say when this is happening?

ive seen ports shut down due to exessive errors but what your saying is pretty clean so it doesn't make sense.

 

[burtsbees]

I have never seen any interface go administratively down without issuing the "shutdown" command.

Burt

 

[Sydgix]

No, the router didn't reboot since I have few others interface that stay up and running...I worked on a world wide network before (280 routers ) and never seen that before ....The log only show that the interface shutted down administratively...

 

[burtsbees]

What log, exactly?

Burt

 

[plshlpme]

does somebody have the ability to do this through snmp or some other remote means?

i actually work on a network with thousands of routers so i find it strange.

does the log have a "configured by xxx on vty xxx" right after this happens?

 

[Sydgix]

plshlpme,

In fact, since we don't have monitoring tools, it takes time before we notice the problem and when the interface is going down, we don't see anything in the log because there is too much event in the log that has been written over the information we're looking for. We have like 8 minutes buffer in the log...we don't keep event from the log...(I guess we will have to now)..

But no one in the company is able to do that remotely. It happens once in a while since this interface has been turned on a year ago. I'm new employee here so, I can't change the world in few days ;-). There is so much to do here...

but thank you very much for your help, please persue if you have any Q...

 

[plshlpme]

you might want to set up a remote log host
so that you can capture the events and then go back and investigate.

i use php-syslog-ng on my server at home to capture all the logs of my routers and servers...
nice web gui where you can sort via host or alarm and it all gets stored in a mysql database.