New graphs on existing hosts not showing data

[dazzagibbs]

Hi.

Not sure if this is the right forum, but I don't think this is specifically related to Linux or Windows, so I'll stick it here until someone tells me otherwise.

I have a Cacti installation running for monitoring a number of hosts (mainly Cisco switches) which I've run into a vexing issue I can't seem to figure out.

When I add a new host, or another graph to an existing host, Cacti simply doesn't gather data. The config is fine - the SNMP queries work, and discover all the interfaces, I can create graphs for the interfaces I want, which display in the graph tree fine - there's just no data.

All the values for traffic read "nan", and the graph itself is just a blank, gray slate.

The new graphs look like this

cacti.png (16.46 KiB) Viewed 808 times

Existing interfaces (which have been graphed for some time) work fine - it's only new graphs (on existing or new hosts) which just don't appear to gather data

My setup for the monitoring server is

Centos 5.9
Linux kernel 2.6.18
Cacti 0.8.8a-1
PHP 5.1.6

The system is patched fairly regularly from the CentOS default repositories, and is pretty up to date.

I'd rather not have to blow the server away (and the associated historical data) if I can avoid it.

Can anyone suggest where I should begin looking/troubleshooting?

Thanks.

[masoncharest]

Have you added new disk shelf to the attractive controllers and created three new aggregates. I want see that how it is connected and how does it work.

[dazzagibbs]

Have you added new disk shelf to the attractive controllers and created three new aggregates. I want see that how it is connected and how does it work.

Disk shelf? These are switches/routers - there's no disk involved.

Not quite sure where you're going with this - can you explain?