Hi,

We have acouple of Cisco Routers that occasionally start clocking up errors on the serial interfaces input and output. I tried adding a passive monitor but dont get any results. Below is a copy of an interface with wrrors ideally I would like to trigger an alarm if the no of errors exceeds a certain number.

Any help appreciated.

Serial3/1 is down, line protocol is down
  Hardware is M4T
    Internet address is 140.1.177.1/24
  MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, loopback not set
  Keepalive set (10 sec)
  Restart-Delay is 0 secs
  Last input 02:16:07, output 01:39:57, output hang never
  Last clearing of "show interface" counters 4d23h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/19/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1536 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     434163 packets input, 82494535 bytes, 0 no buffer
     Received 48596 broadcasts, 0 runts, 1 giants, 0 throttles
     2794145 input errors, 2393648 CRC, 0 frame, 245 overrun, 0 ignored, 400252
abort
     548245 packets output, 299530118 bytes, 0 underruns

Hello,

I'm still waiting for a solution to that problem !!! I'm looking for the OID of the CRC errors. But, if you want, there is the Object "InErrors" in the MIB that give the number of Input Errors... You can so create an Active SNMP Monitor to watch that value...

Thanks...

I finally found the solution.

If your device support the MIB OLD-CISCO-INTERFACES-MIB (type the name of your device with "supported MIB" in the Cisco search motor in the website to know), you just have to add it to WHS with the mibextra.exe program.

Then, all the fields that you want to monitor will be accessible : runts; giants, crc, collision... See the details in http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&mibName=OLD-CISCO-INTERFACES-MIB. To know the OID of each object, go to : http://tools.cisco.com/Support/SNMP/.

Hoping it will help you...

See you

If I add the monitor to a device that I know has thousands of input errors on it the monitor goes down as it should. However, if I then clear the counters on that interface, the monitor never shows up. Even if I right-click the device and select "Poll Now". Any ideas?

Time T0 : Reset counters : Counter = 0
Time T1 : No errors : Counter is still 0
Time T2 : 1000 errors happened since T1 : Counter is 1000
Time T3 : 100 errors happened since T2 : Counter is 1100

And so on, until the counter reaches its limit and wraps again to 0.

So, if you check your counter every 60 seconds, and are not willing to accept more than one error per minute, you should use "rate of change" with a value of 1.

If you reset the counter and don't see anything change, then it means that no error happened since your reset.

Reading, writing and arithmetic - If you need to choose, please take option 1.

I see that this mib had dependencies so i did mibextra on those mib's then did mibextra on the old interfaces mib. I cannot locate the crc or runt, or collison indentifier in order to track # of crc errors on my cisco wan routers-as a perf monitor. Would it be possible that you can explain more? Thanking you in advance...

Thanks

Discovery