Graphing Trouble (Gaps in drawn graph)

[Alcheemy]

Hi guys,

I am having some problems that are made obvious whilst looking at the graphs produced by Zabbix when monitoring several network interfaces on the same switch.

This is what I am seeing:


As you can see in the image above, thre are "holes" in the series' on the graph.

I'm not sure whether this is due to a problem with retrieving data from the switch, a problem with the Zabbix SNMP Agent or with the graphical classes in the Zabbix software itself.

Below is my latest zabbix_server.log

2179:20140404:165937.380 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2165:20140404:165949.738 SNMP agent item "ifInErrors[Port-channel20]" on host "69.x.x.x" failed: first network error, wait for 15 seconds
  2170:20140404:170004.051 resuming SNMP agent checks on host "69.x.x.x": connection restored
  2179:20140404:170137.604 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:170337.807 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:170538.006 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:170740.251 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:170940.464 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:171140.668 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:171340.908 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:171543.130 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:171743.249 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:171943.376 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:172143.506 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:172343.628 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:172542.789 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:172743.049 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:172943.184 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:173143.333 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2165:20140404:173322.427 SNMP agent item "ifOperStatus[TenGigabitEthernet1/8]" on host "69.x.x.x" failed: first network error, wait for 15 seconds
  2170:20140404:173337.208 resuming SNMP agent checks on host "69.x.x.x": connection restored
  2179:20140404:173343.465 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2164:20140404:173503.708 SNMP agent item "ifOutOctets[TenGigabitEthernet1/1]" on host "69.x.x.x" failed: first network error, wait for 15 seconds
  2170:20140404:173518.263 resuming SNMP agent checks on host "69.x.x.x": connection restored
  2179:20140404:173543.605 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2166:20140404:173732.676 SNMP agent item "ifAdminStatus[unrouted VLAN 1005]" on host "69.x.x.x" failed: first network error, wait for 15 seconds
  2179:20140404:173743.831 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2170:20140404:173747.328 resuming SNMP agent checks on host "69.x.x.x": connection restored
  2182:20140404:173935.617 executing housekeeper
  2182:20140404:173940.261 housekeeper [deleted 0 hist/trends, 95930 items, 0 events, 0 sessions, 0 alarms, 0 audit items in 4.643112 sec, idle 1 hour(s)]
  2179:20140404:173943.959 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2179:20140404:174144.081 cannot send list of active checks to [38.x.x.x]: host [Testing123] not found
  2167:20140404:174310.583 SNMP agent item "ifOutOctets[TenGigabitEthernet1/8]" on host "69.x.x.x" failed: first network error, wait for 15 seconds

* Testing123 is connected to a server that has a zabbix agent running, which I no longer have access to, so I cannot turn the agent off.

Also:

I have created a new item for every network interface I would like to monitor, and have got the correct OID's (from snmpwalk/snmpget)

* The OID's used in the settings here are: IF-MIB::ifInOctets.INDEX

Settings for each network interface:





Also, heres the settings for the graph with multiple network interfaces:



The Zabbix version I am using is: Zabbix 2.2.

It seems I am having the same issue as this person: https://www.zabbix.com/forum/showpos...80&postcount=4

However, his solution did not seem to fix my problem.

Could it simply be that the box I am hosting my Zabbix panel on is too weak to handle it?

[aib]

Check this FAQ - SNMP Counters: Frequently Asked Questions

Because you have high speed interface, your SNMP counter overflowing very quick.
Use 64-bit SNMP counter.

[Alcheemy]

Check this FAQ - SNMP Counters: Frequently Asked Questions

Because you have high speed interface, your SNMP counter overflowing very quick.
Use 64-bit SNMP counter.

Thank you for the reply. I will try to update my OID's and see what happens.

Regards,
Alcheemy

Edit:

Just edited my OID's and set them to IF-MIB::ifHCInOctets.INDEX. My graph is now showing up to 3Pbps. It is now on its way down.

[Alcheemy]

I managed to fix the last problem, with the graph disconnecting when its stacked. I am now however running into a new issue:



This is from total traffic on interface 1/4. Does anyone know what the problem could be?

[aib]

Check Timeout= settings in /etc/zabbix/zabbix_server.conf
Try to increase it from (default) 3 sec to 10-15 second.