EXOS SNMP filter

[Chris]

Hi,
is it possible to filter snmp message from EXOS?
I want to do a snmpbulkwalk to a switch with more than 800 VLAN's. The snmpbulkwalk need more than 5 minutes. This is fatal for my rrd graphs.
Can I dismiss all VLANs (IF-MIB::ifDescr.1000001 ... >1000000) so that the bulkwalk doesn't get this informations?

[Drew_C]

Chris,
Check the output of

code:

show management

. You're looking for these lines near the bottom:
SNMP Compatibility Options :
GETBULK Reply Too Big Action : Too Big Error
IP Fragmentation : DisallowThe "GETBULK Reply Action" is configurable with this option:
X460-24t.2 # configure snmp compatibility get-bulk reply-too-big-action
standard Generate a response as per the standard
too-big-error Generate a 'too big error' response (Default)Note that these large responses can potentially bog down the switch while being generated and transmitted... you may want to first test in a lab or other controlled environment.

-Drew

[Chris]

Hi Drew, thanks for your answer.
This would be helpful. 

[Chris]

Thanks for your fast feedback. I want to use observium and still tried the -Cr option. But the snmp request dies after some seconds with following message:

Error in packet.Reason: (tooBig) Response message would have been too large.

[Chris]

I tried librenms but it's the same poller mechanism as observium uses it.