[mrtg-developers] Method of retrieving Bits per sec (MRTG ref)

S Shipway s.shipway at auckland.ac.nz
Wed Mar 17 21:53:58 CET 2010

MRTG obtains this data by reading the ifInOctets and ifOutOctets values in the IF-MIB via SNMP at 5min intervals, calculating the difference (taking into account possible counter wrap)  and dividing by the time interval, then multiplying by 8 to get bits/sec.  This is in the standard MIB.  If the interface is a high-speed interface (>=100Mbps) and the device supports it, then the MIB-2 isused instead and the h64bit counters ifHCInOctets and ifHCOutOctets are used instead (to prevent counter wrap from causing problems).


From: Prakash Mariasusai [via MRTG Mailinglists] [mailto:ml-node+4750489-553955619-68162 at n2.nabble.com]
Sent: Thursday, 18 March 2010 3:13 a.m.
To: Steve Shipway
Subject: Method of retrieving Bits per sec (MRTG ref)
I am writing a small program to get the "Bits per sec" value
for a network interface in Unix systems (Solaris, Linux severs)
similar to the one provided by MRTG in the below link:
I assume that MRTG does the same through SNMP.
I am new to SNMP and if someone can point me to the appropriate MIB/OID,
for doing the same, it would be very helpful.
Thanks in advance,

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