Re: ASR Performance with Netflow Sampling

JB,

I don't have an answer for you, I would be interested in what you find out.
I just deployed some ASR 9006s but set the sampling rate really high (1 in
1000) with the intention of lowering it and monitoring.

An interesting tidbit, the ASR 1000 by default is no longer capable of
taking a full internet BGP feed since we passed 500K routes a while back.

-Marc

On Wed, Feb 11, 2015 at 6:36 AM, Chris Rae <chris.rae07_at_me.com> wrote:

> Yeah.....its one of of the few platforms in Cisco's arsenal that you would
> have to push multi-10Gbps through to effect the performance.
>
> Years ago we where running netflow as well as BGP/OSPF/QOS etc on the 2800
> series platform.
> If the 2800 can handle it....i dont think the ASR will have an issue. ;)
>
> Chris
>
> > On 11 Feb 2015, at 1:17 pm, JB Poplawski <jb.poplawski_at_gmail.com> wrote:
> >
> > Flipped it on and didn't burp. In theory it's taking a sampling of CEF
> so not a packet capture per se. Just don't want to be the guy turning it up
> and breaking things.
> >
> > Thanks for replying.
> >
> > Sent from my iPhone
> >
> >> On Feb 10, 2015, at 9:04 PM, Chris Rae <chris.rae07_at_me.com> wrote:
> >>
> >> Impact performance on an ASR??? I doubt it.
> >> They have dedicated quantum flow processors for forwarding and separate
> processors for QoS etc.
> >> I would be surprised if you impacted the performance.
> >> I implemented a pair of ASR 1006s about 7 years ago for a customer,
> including netflow. Didn't put a dent in the CPU overhead.
> >> But check the bug list for the IOS you using and make sure there are no
> known memory leak issues or bugs around netflow to be safe.
> >>
> >> Definitely raise a change for production equipment if you are worried
> about impact.
> >> Even if you set the impact to low....it covers ur arse :)
> >>
> >> Chris
> >>
> >>> On 11 Feb 2015, at 5:12 am, JB Poplawski <jb.poplawski_at_gmail.com>
> wrote:
> >>>
> >>> Figured someone out here is better at Google than me. :)
> >>>
> >>> Been running V5 Netflow, obviously the newer devices are on 9 and more
> >>> configurable.
> >>>
> >>> My question/concern.
> >>>
> >>> If I set 1 outof 2 sampling rate, am I going to impact performance on
> the
> >>> box? Try setting it during a change window and see?
> >>>
> >>> Cisco has a performance guide, slightly dated and of course it doesn't
> >>> cover the new products (Nexus 6k, ASRs, etc).
> >>>
> >>>
> http://www.cisco.com/c/dam/en/us/solutions/collateral/service-provider/secure-infrastructure/net_implementation_white_paper0900aecd80308a66.pdf
> >>>
> >>> Any advice or guidance?
> >>> JB
> >>>
> >>>
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-- 
Marc Abel
CCIE #35470
(Routing and Switching)
Blogs and organic groups at http://www.ccie.net