Data missed when busy

[wenko]

I know what you're thinking, "well duh, packet loss!", or "It's too busy to reply" but that's not the case.

See image: http://imgur.com/rv63tXh

Why is it that when this new interface gets to ~>80mbps it stops reporting the outbound traffic? All other graphs are fine at this time, including the 10GE interface which is well over 100mbps. When I use SNMP to query it from the same device via CLI I get data returned for that interface (SNMP ID 10103). The appliance is a Cisco switch.

When this device was originally added this interface was admin down. Could that be an issue?

Cheers,

[wenko]

Oh, FYI:


Technical Support
General Information
Date Mon, 15 Feb 2016 12:41:28 -0800
Cacti Version 0.8.8b
Cacti OS unix
SNMP Version NET-SNMP version: 5.7.2
RRDTool Version RRDTool 1.4.x
Hosts 11
Graphs 406
Data Sources Script/Command: 5
SNMP: 10
SNMP Query: 390
Script Query: 2
Total: 407
Poller Information
Interval 300
Type cmd.php
Items Action[0]: 790
Action[1]: 9
Total: 799
Concurrent Processes 1
Max Threads 1
PHP Servers 1
Script Timeout 25
Max OID 10
Last Run Statistics Time:8.3091 Method:cmd.php Processes:1 Threads:N/A Hosts:12 HostsPerProcess:12 DataSources:799 RRDsProcessed:407
PHP Information
PHP Version 5.5.9-1ubuntu4.14
PHP OS Linux
PHP uname Linux xxxxxxxxxxxxxxxxxxxx 3.13.0-77-generic #121-Ubuntu SMP Wed Jan 20 10:50:42 UTC 2016 x86_64
PHP SNMP Installed
max_execution_time 30
memory_limit 128M

[wenko]

I may have it figured out. I changed the config for the graphs to U for "undefined" max-value on the graph/RRD, changed the device to SNMPv2c, and set the graph to 64bit counters. This special blend of herbs and spices seems to have corrected the issue.

I will watch it a little longer, and if that works I will be very happy.