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wilcdr's avatar
wilcdr
Icon for Nimbostratus rankNimbostratus
Oct 18, 2016

Making SNMP queries in iRules

From other questions people have asked, it looks like there is no built-in command for SNMP queries that you can make from iRules. Is that still true (running LTM 11.6)?   If that is not possible...
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  • Kai_Wilke's avatar
    Kai_Wilke
    Feb 08, 2023

    Running an periodic iCall Job in the Config-Plane to query SNMP and write results to a DG would be a much easier and elegant alternative. No? Dealing with ASN1-BER in iRules isn't much fun... 🙂

    Cheers, Kai

    LiefZimmerman : Good to see that the ordering in DevCentral has finally been changed, so that we can see if something gets added to rather old questions. Thanks!

VernonWells's avatar
VernonWells
Icon for Employee rankEmployee
Oct 18, 2016

You cannot use an external Tcl package in iRules. You can manually construct SNMP requests and responses using 

binary format
and 
binary scan
, or you can use iRulesLX and perform the query using node.js. However, as @Odaah very sensibly suggests, your intended use-case may suggest that something other than an iRule is appropriate (if, for example, you wanted to use SNMP to determine the monitor state for a pool member or node).