Are you sure this isn't the SNMP v1 32 bit counter problem? In SNMP v1
a 32 bit counter is used to store the count of bytes an interface has
passed, assuming a 5 minute polling period this rolls over after a
continuous 109.22 Mbps:
32^2 = 4294967296 bytes
= 34359738368 bits
= 32768 Mbits over 300 seconds
= 109.22 Mbps
Cheers
Martin
Craig Small wrote:
> On Wed, Dec 12, 2007 at 03:39:40PM -0700, Travis Johnson wrote:
>> I have some ethernet interfaces that are now passing more than 100Mbps
>> of traffic. When I look at the graphs, they are all screwed up because
>> it "rolls over" (so 105meg actually graphs as 5meg), yet the numbers on
>> the graphs are all correct. I am using SNMPv1 for these interfaces. Is
>> there a setting I am missing?
> That's not the typical roll-over problem. Have you set/fixed your
> maximum data rate for the interfaces? I'm wondering if JFFNMS/RRD sees
> 105meg, and thinks "that's silly for a 100meg interface" and dumps it.
>
> - Craig
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