[mrtg] Using hrSystemUptime with RouterUptime

[Steve Brown]

> From the MRTG documentation examples:
>
> RouterUptime[kacisco.comp.edu]: hrSystemUptime.0:public at 194.64.66.250
>
> If you do not give the 'OID:' prefix then it defaults to the normal uptime counter.

Correct.  I have tried both of these lines (independently, of course):

RouterUptime[test]: hrSystemUptime.0:public at 192.168.1.1
RouterUptime[test]: 1.3.6.1.2.1.25.1.1:public at 192.168.1.1

However, I get the same error from MRTG with either of these lines.

> Note that the RouterUptime directive is not yet supported by the Routers2 frontend for performance reasons.

How do I know which frontend I am using?