Zabbix shows input/output traffic from router (snmp) less than actual.

[zabbixfk]

Hello All,

I have configured router to send snmp data to zabbix, where i see that input and output traffic readings are shown less when compared to router readings.
If i do snmpwalk, i get below data, (something like 350kbps )

IF-MIB::ifInOctets.22 = Counter32: 351772510

Where zabbix shows 3.5kbps. ( suppose to show 350 kbps )
Settings on zabbix is as follows,

Key : ifOutOctets.11
OID : .1.3.6.1.2.1.2.2.1.16.11
Type : Numeric ( unsigned )
Datatype : Decimal
Units : bps
custom multiplier : 8
Store value : Delta ( speed per second).

Am i missing something here, does unit or custom multiplier needs to be changed? Any pointers are greatly helpful.

Thanks.

[aib]

Are you sure, that two different interfaces has to have the same traffic?

In snmpwalk you checked Incoming traffic on interface 22:

IF-MIB::[B]ifInOctets.22[/B] = Counter32: 351772510

But in Zabbix you check Outgoing traffic on interface 11 :

Key : [B]ifOutOctets.11[/B]
OID : .1.3.6.1.2.1.2.2.1.16.11

It confuses me.

Could you check the result of snmpwalk for ifOutOctets.11 and compare it with Zabbix item?

[zabbixfk]

Zabbix shows input/output traffic from router (snmp) less than actual.

Yes, i am also monitoring interface 22. ( about 2-3 interfaces are being monitored) - and for all i am getting traffic less than what is shown on router end.

Thanks

[aib]

Is it possible that you have so heavy traffic that your counter overflow between updates?

For some heavy loaded interfaces is better to use Counter64 (if your router can provide it). Especially for 1Gbit/10Gbit interfaces.

For additional information check CISCO: SNMP Counters: Frequently Asked Questions

[zabbixfk]

Zabbix shows input/output traffic from router (snmp) less than actual.

Thanks for the reply.
The router has only 512kbps connection, and i think that's not a heavy load. SNMPWalk shows Counter32 with the number, zabbix database has the same number. That means router is sending it properly, and zabbix database ( items table) has correct data. Only problem is showing it in the UI.

Looks like, something to do with custom multplier 8 or bps as a unit.
Any pointers are greatly helpful.

Thanks.

[rekeds]

octet is 8 bits, if you want bps, use multiplier 8.