[j-nsp] LDP flaps specifically present on ACX Juniper routers (ACX4000 and ACX1100)

[raf]

Yep the software poller I was using, make a lot of bulk walk on the 
entire part of the Mib (I was using observium and it had a so poorly 
coded poller).
Other software made more intelligent polling using cache and atomic get 
(like cacti).
Anyway even a bad snmp poller should not kill the control plane of a 
router/switch.
Junos should have implemented software qos, leaving some cpu time for 
critical daemon (rpd, lacpd, etc..) or even better use a real time os 
(like some other vendor do)...
The fun thing is that manually nicing the snmpd process help. I wonder 
why juniper does do that by default ?

--
Raphael Mazelier

Le 28/04/2016 à 22:02, Aaron a écrit :
> About snmp...
>
> Is your Management station walking the entire mib tree of your devices ?!
>
> I've experienced over the years that when I management station is NOT tuned
> appropriately, it WILL spike the processors of your routers/switches during
> the polling cycle, like every 15 minutes or so, whatever it is set to.
>
> I'm not sure this is your problem, but it could be.
>
> Aaron
>
> p.s. it's probably dumb/unnecessary to have a snmp mgmt. station hit all the
> OIDs on the network devices.... since you probably don't want/need that much
> info queried anyway.
>
>
>
> -----Original Message-----
> From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
> raf
> Sent: Thursday, April 28, 2016 11:03 AM
> To: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] LDP flaps specifically present on ACX Juniper routers
> (ACX4000 and ACX1100)
>
> Hi,
>
> Is your RE cpu utilisation is OK or not ?
>
> I have similars issues on EX during snmp polling, which are eating all the
> cpu time.
>