Is using your router's processor, i.e. 99%, all the time going to burn out the processor? I know for sure that we can totally run our desktops and GPUs at 99-100% pegged 24/7 as long as they remain cooled. Is there anything dangerous about having this happen with Cisco Routers? i.e. they will actually burn up? I understand that routing performance will drop when pegging max usage.

There is no root issue or reason I need to justify using 99%. Occasionally when intervlan routing, using my routers processor, and not my l3 switch in certain labs it will hit 99% when transferring large files between VLANs.

Thanks just curious.

_________________
Awesomesauce!!!!

No burn, but the performance is dramatically decreased. A 99% percent for a long time it's no normal.

Yep, it does not burn. I have been running one of my 1721 at 99% too for close to an year (in a testing environment) but still working perfectly.

_________________
Isuru Senadheera
MCSE, CCNP, CCSP, MCITP
www.isururakshitha.org

Instead of asking will it do any damage I would instead be looking at WHY it is running at 100% in a production environment and get the issue resolved

_________________
---
David
CCIE R&S #38338, CCIP, CCNP

http://networkbroadcast.co.uk - My Blog
http://twitter.com/davidrothera

Someone disabled CEF on your 7200?

_________________
- Pete

I never said it was in production environment unless you were referring to another poster But I feel you and I would wonder the same also.

_________________
Awesomesauce!!!!

Thanks for the answers. At least I know I am safe to run my router at 99% when transferring large intervlan files.

_________________
Awesomesauce!!!!

running a router on a stick? yeah, that will do it. check the interfaces for output drops.
if you are getting them, time to look into a L3 switch to offload the inter vlan routing.

_________________
"If you're good at anticipating the human mind. It leaves nothing to chance."
-Jigsaw

Yeah, an ISR will forward all traffic via the CPU when routing (there are offload cards for IPSec, etc ...). When you spike up to 100%, the router is maxed out in forwarding performance. Depending on what features you have turned on, this will decrease performance.

A good L3 switch has a line rate ASIC that laughs at you no matter what you throw at it -- even if you fully load a 48 port 10gig + 4 40gig port switch. Though, if that ASIC doesn't support a feature, it will be software forwarded and you will be in trouble.

I have a 3750E 24 port gig switch with 2 10gb ports.

It absolutely rockets data through it at full line speed. MY 1921 however tends to vomit a little at about 60-75MB/s max line speeds when intervlan routing which is still quite high for a router in this class if you ask me.

I have to loan to a customer of mine in a pinch and am going to be converting my home network to my 8 port ehwic for a little while in the back of my 1921 isr. I didnt want to overstress my routing processor too hard but being that you really cant overheat them I am not worried for the two weeks I will be loaning my switch in a pinch.

I do not like routing on a stick when I have such a good layer 3 switch to do intervlan for me. This is completely temporary.

_________________
Awesomesauce!!!!