[afnog] SNMP and MRTG

[Richard Zulu]

Hey,

Has anyone experienced this before.

I have configured MRTG to poll my cisco 7201 router.

However, the bandwdith utilisation graphed by MRTG is way lower than the
output from "Show interfaces"

I have performed an snmpwalk and compared the output from the snmpwalk on
the server running MRTG to the output from "show interfaces Gigabit...."
and they are quite similar. Showing the right information is being polled.

An example of comparing outbound octets:

*>Show interface GigabitEthernet 0/2*
*.....................*
*....*

*Output queue: 0/40 (size/max)*

*  30 second input rate 23139000 bits/sec, 2868 packets/sec*

*  30 second output rate 5054000 bits/sec, 2267 packets/sec*

*     2242060086 packets input, 3291021322 bytes, 0 no buffer*

*     Received 19955 broadcasts, 0 runts, 0 giants, 0 throttles*

*     4228 input errors, 0 CRC, 0 frame, 0 overrun, 4228 ignored*

*     0 watchdog, 228449 multicast, 0 pause input*

*     0 input packets with dribble condition detected*

*     2202699329 packets output, 835856416 bytes, 0 underruns*

*     21 output errors, 0 collisions, 15 interface resets*

*     13289 unknown protocol drops*

*     0 babbles, 0 late collision, 0 deferred*

*     21 lost carrier, 0 no carrier, 0 pause output*

*     0 output buffer failures, 0 output buffers swapped out*

*
*

Compared to

*snmpwalk -v2c -c public 192.168.1.1 .1.3.6.1.2.1.2.2.1.16*

*iso.3.6.1.2.1.2.2.1.16.1 = Counter32: 9328576*

*iso.3.6.1.2.1.2.2.1.16.2 = Counter32: 0*

*iso.3.6.1.2.1.2.2.1.16.3 = Counter32: 2153712686*

*iso.3.6.1.2.1.2.2.1.16.4 = Counter32: 834667822*

*iso.3.6.1.2.1.2.2.1.16.5 = Counter32: 0*

*iso.3.6.1.2.1.2.2.1.16.7 = Counter32: 0*

My question is, what can I be missing here? How can i troubleshoot this
further?

Thank you


Richard Zulu

Twitter
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http://www.linkedin.com/in/richardzulu

Skype: zulu.richard
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