check_rrdtraf check router interface but collect no traffic?

[xpertech]

before change Cisco routers, there's no problem using check_rrdtraf to collect router interface mrtg traffic data, but after changed Cisco routers model, NagiosXI seems can not collect some of the mrtg traffic data?!
1. NagiosXI/mrtg remained the same.
2. New model Cisco routers had different IP.
3. For the new Cisco routers, there're normal traffic data displayed on MRTG, but no traffic data on NagiosXI plugin check_rrdtraf(check_mrtgtraf).

what could be the problem?

[mbellerue]

Can you post the check command you use to monitor the new Cisco routers, as well as the command for the old Cisco routers? Are these routers monitored via SNMP? Did you run through a wizard when you put the new routers in place?

[xpertech]

the command used to monitor old/new Cisco router was the same one, through SNMP, same setup steps via wizard.

[mbellerue]

Perfect, thank you! Also, what is the model of the new Cisco router?

[xpertech]

old router model is Cisco CISCO1941/K9

new router model is Cisco CISCO891

[mbellerue]

Perfect, thank you. Can you run this command on your Nagios system. I want to see whether or not that file is being written to.

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ls -lh /var/lib/mrtg/10.118.1.214_*

It might also be worth PM'ing me a profile. Admin -> System Profile -> Download Profile

[xpertech]

already PM attachment.

[mbellerue]

Excellent, I have the profile, I'm going to take a look through that. Can you also post the output from this command?

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ls -lh /var/lib/mrtg/10.118.1.214_*

[xpertech]

Had PM some attachments...

[mbellerue]

Everything looks good. Can you run this command, and if it returns any output, go ahead and send it to me.

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LANG=C LC_ALL=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg