Interface problem !

sirprotos · Post by **sirprotos** » Tue Aug 23, 2005 1:03 am

i've add one cisco router (7200) but i can't add any interface to monitor. is it becouse of there are too many interface or is there anything elase. please help me... a new birth in this cacti stuff ! TQ very much !

Post by **TheWitness** » Tue Aug 23, 2005 5:04 am

Is it your router? Can you get at the Interface information using "snmpwalk -c <your_community> -v <your_version> <your_hostname>"? If a supplier is providing you services, you may be restricted from accessing that information.

TheWintess

sirprotos · Post by **sirprotos** » Wed Aug 24, 2005 1:31 am

ok this is the senario. the routers is mine. last time when i add it in MRTG it can be monitored. but when i try to monitor using cacti, it seem that none of the detected interface can be monitored. when i click several inteface to create a graph, all the interface have the same name and no graph where produced. i hope this will help u guys to find out a solution. TQ bro BTW !

Post by **TheWitness** » Wed Aug 24, 2005 5:17 am

Please reindex either using the green circle or "query verbose". Goto create graphs and do a sceen capture. Post that capture.

TheWitness

sirprotos · Post by **sirprotos** » Wed Aug 24, 2005 10:40 pm

Ok here is my first screen short :

1) screen short of interfaces
2) screen short when i select 3 of the interface to create a graph
3) graph management screen short

Hope this will help u guys to pin point my problem. Thank You Very Much.

sirprotos · Post by **sirprotos** » Thu Aug 25, 2005 2:56 am

more info.... when i try to requery the interface, the browser return me to a blank page of host.php ! and it stays there. hope this will help.

lard · Post by **lard** » Thu Aug 25, 2005 5:06 am

Hi,

Also having the same problem on some devices - did you manage to resolve this at all?

I am currently thinking that this is down to a slow SNMP reply from the devices (showing 300+ ms) and am going to increase PHP timeout....any pointers one what this should be set to?

Thanks,

Lard

ali_ · Post by **ali_** » Fri Aug 26, 2005 8:55 am

I have the exact same thing here. The unusual thing is that i have other devices which work perfectly fine. I can monitor CPU usage, but not the interfaces.

Any ideas, as i'm pulling my hair out

Ali

lard · Post by **lard** » Sun Aug 28, 2005 8:17 am

Hi,

If you snmpwalk the device from the command line and compare this to another device of the same type that is working correctly you will see the difference in response time to walk the entire mib....

The CPU/Memory e.t.c. will come back quite quickly as this is just querying one OID but the interface table will need to be read and takes longer....this will timeout if the device is busy,

In short Cisco boxes prioritise the processes so that IP Input will be a high priority and at the bottom will be SNMP - hence if the device is heavily utilised (or just busy processing packets) then SNMP will take longer - this is the cause on a few of my devices and I followed the instructions to increase SNMP, PHP & other timeout settings and this solved it for all but the slowest to snmpwalk,

Hope this helps,

Lard

ali_ · Post by **ali_** » Mon Aug 29, 2005 9:08 am

Lard,

Thanks very much for your reply. I had actually tried increasing the timeouts, but it seems i didn't increase enough! My problem now seems to be fixed thanks to your pointer, however for some of my remote hosts i had to increase the max_execution_time to 300 seconds!

Many thanks for your help!
Ali

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