Hi,

Thank you for your answer.
No, I would like to filter more interfaces.

The idea is to examine a table an to filter the result.

For example , filter the inteface mgmt but leave other.

Cordially,






André Auvinet
Technicien réseaux & télécoms
Département général des ressources numériques
Nantes Métropole et Ville de Nantes
Tour Bretagne
44923 Nantes cedex 9
Tél. 02 40 99 93 59
Fax. 02 40 20 38 48





________________________________
De : Tom Throckmorton [mailto:[email protected]]
Envoyé : jeudi 3 janvier 2013 18:09
À : Bill Schwanitz; AUVINET Andre
Cc : [email protected]
Objet : Re: [collectd] Need help for filter

On Thu, Jan 3, 2013 at 10:33 AM, Bill Schwanitz 
<[email protected]<mailto:[email protected]>> wrote:

On Jan 3, 2013, at 10:15 AM, AUVINET Andre 
<[email protected]<mailto:[email protected]>> 
wrote:

> Yes,  I want "stop" target for interfaces I did not need.
>
>
> Something like :
>
> LoadPlugin "SNMP"
> <Chain "PreCache">
>  <Rule "Ignore_interfaces">
>    <Match "regex">
>      Plugin "^snmp$"
>      Type "if_octets"                >>>> I don't know
>       TypeInstance ""                >>>> I don't know
>    </Match>
>     <Target "stop">
>     </Target>
>  </Rule>
>  Target "write"
>  /Target
> </Chain>

Type is probably going to be your IF-MIB::ifOctets.526846912

Do you know how to find the interface index?
$ snmpwalk -v2c -c foo_comm_string foo_host IF-MIB::ifName
IF-MIB::ifName.526846656 = STRING: Ethernet104/1/44
IF-MIB::ifName.526846720 = STRING: Ethernet104/1/45
IF-MIB::ifName.526846784 = STRING: Ethernet104/1/46
IF-MIB::ifName.526846848 = STRING: Ethernet104/1/47
IF-MIB::ifName.526846912 = STRING: Ethernet104/1/48
(...)

I imagine you are going to need that. Its probably going to be dropped in to 
TypeInstance value whole like this

TypeInstance "IF-MIB::ifName.526846912"

again, just a guess - this is kinda new to me. I'm adding this back to the 
mailing list in case anyone else is more familiar.

I haven't tried filtering, but if you only need data for a single interface, 
then it can be done without the filter; in the 'Data' definition within the 
snmp plugin config, just specify the OID+index in the 'Values' and set 'Table' 
to false, which will lead to only the data for that interface being pulled 
rather than the plugin parsing the ifTable.  Assuming the index of that 
interface is 12345 on both chassis, something like:

  <Data "ifmib_if_octets32">
    Type "if_octets"
    Table false
    Instance "te-0-1"
    Values "IF-MIB::ifInOctets.12345" "IF-MIB::ifOutOctets.12345"
 </Data>

  <Host "Nexus_5548_1">
    Address "172.20.0.30"
    Version 2
    Community "public"
    Collect "ifmib_if_octets32.12345" "ifmib_if_errors32.12345"
    Interval 120
  </Host>
  <Host "Nexus_5548_2">
    Address "172.20.0.31"
    Version 2
    Community "public"
    Collect "ifmib_if_octets32.12345" "ifmib_if_errors32.12345"
    Interval 120
  </Host>

The instance will be appended to the value list, so in this example you'd end 
up with rrd filenames like 'ifmib_if_octets32-te-0-1', though you may also 
leave the instance blank.

Cheers,

-tt
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