Network equipments process utilization
Elmar K. Bins
elmi at 4ever.de
Tue Feb 10 02:39:44 CST 2009
Good morning (from here),
lionair at samsung.com (???×?) wrote:
> I wonder which percentage is good level of CPU and Memory util of network equipment ?
> In my case, I try to keep under 30% cpu util and 70% memory util. My most equipment are Cisco product.
> I have no technical reference about that, it is just a rule of mine or my predecessor.
> Could you tell me how other operators are doing ? what is your operation baseline ? or is there any guideline about process utilization ?
I'm trying to keep all Cisco equipment idle, if at all possible,
since there may come worse times...
Typical exceptions are
- software forwarding routers, where CPU load is directly
depending on current traffic levels; should the load stay
above 15-20% all the time, it's time for an upgrade
- slow-CPU boxes like everything Cisco with SUPs, since the
CPU load _always_ jumps to 100% for short periods of
time - BGP needs something calculated ;-) I get interested
whenever CPU load _stays_ high
- switches; Cisco switches need like 5% CPU to blink the LEDs ;)
It gets more interested with packet filters and load balancers,
where CPU loads depend on traffic levels and patterns. I try to
keep the baseline between 5 and 10%.
More information about the NANOG