[f-nsp] XMR slow snmp

[Eric Cables]

Do you have any idea how many SNMP requests/sec you're sending to the
device in question? I've seen timeouts like this when the device is
overwhelmed with SNMP requests. Perhaps you have another NMS system that is
sending a lot of queries, or this NMS system is sending them too rapidly?

As far as an snmpbulkwalk, this should be perfectly functional on an XMR
that isn't receiving a lot of SNMP contention from other NMS systems.


-- Eric Cables

On Fri, Feb 27, 2015 at 1:49 PM, Thomas St-Pierre <tstpierre at iweb.com>
wrote:

>  Hi!
>
>  I’m trying to monitor a few foundry XMR’s via SNMP, however I’m
> experiencing issues where the XMR is VERY slow at responding, if it
> responds at all. I’ve confirmed it’s not an ACL issue (there’s no receive
> ACL, etc) and the CPU while a little busy, is not crazy. (40%usage overall,
> SNMP only tacking 1% average). snmpget’s timeout 3/4 of the time.
> snmpwalk’s are impossible, as even if a few values are returned, it will
> inevitably time-out before it reaches the end.
>
>  I must admit I’m a bit new to the XMR platform, can anyone let me know
> what I could check regarding this?
>
>  Here is the current snmp configuration:
>
>  snmp-server
> snmp-server community 0 OUR_COMMUNITY ro 10
> snmp-server max-ifindex-per-module 64
> snmp-server cache size 200
> snmp-server cpu max-non-idle-utilization 25
>
>  My IP is of course in access-list 10.
>
>  Not super familiar with how the cache works, but it shows the following
> currently:
>
>  SNMP cache statistics:
>
>  Configured size: 200KB
> Configured maximum age: 500ms
> Percent of space in use: 0%
> Total objects requested: 195679182
> Total object prefetches requested: 3310250001
> Total requested objects found in cache: 173081906
> Total objects aged out: 72533169
> Total objects removed for space: 0
>
>  Cache hit rate: 88%
> Percent of objects aged out that were unused: 9%
> Percent of objects removed for space that were unused: 0%
>
>
>  Thanks!
>  Thomas
>
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