[mrtg] Null Returns for Target Mathematical Expressions

Alistair.McGlinchy at marks-and-spencer.com Alistair.McGlinchy at marks-and-spencer.com
Tue Jul 17 14:57:02 MEST 2001


I have been playing with the mathematical expression syntax of targets.  For

Target[PAIR_HO_to_Chester]:1:public at + 1:public at

This works fine for WAN links which are up 24 hours a day. However when I
started monitoring workstations I discovered that if one of the SNMP Get's
fail (eg when the client is turned off). the entire sum returns 0 even if
other parts of the sum return good values. 

Q1) Is there any way to get around this?

Q2) Is there any way for MRTG to cache the returned values so that any
additional appeals to "1:public at" in the same cfg file do not
require talking to the router again?




Registered Office:
Marks and Spencer p.l.c
Michael House, Baker Street,
London, W1U 8EP
Registered No. 214436 in England and Wales.

Telephone  (020) 7935 4422
Facsimile  (020) 7487 2670


Please note that electronic mail may be monitored.

This e-mail is confidential. If you received it by mistake, please let us know and then
delete it from your system; you should not copy, disclose, or distribute its contents to
anyone nor act in reliance on this e-mail, as this is prohibited and may be unlawful

Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
Archive     http://www.ee.ethz.ch/~slist/mrtg
FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi

More information about the mrtg mailing list