Re: OT-How many IPV4 routes Cisco 3900 can handle?

Thanks Lukasz for correcting me. it was 2851 with 1gig which we tested and
other 2811 with max 7xx.

In our lab they worked well for few months, never seen crashing them but
when we put in production it was spitting the dummies!

We were able to re-create the issue by maxing out the CPU by pumping
traffic.
also noticed that by remove bgp and put static route, no matter how much
traffic we pump it didn't crash.

-frog

2009/12/24 #ukasz Bromirski <lukasz_at_bromirski.net>

> On 2009-12-23 15:06, Radioactive Frog wrote:
> > I've seen 2811 creshing to death when tried to keep it in production with
> a
> > gig of RAM.
>
> That's propably because 2811 won't take 1GB of RAM, only 768MB[1].
> Memory controller limitation, been there, done that - even if it has
> 1GB it won't detect it, and may behave in uncontrollable fashion - so
> don't make judgements on unsupported configurations you have no idea
> how behave out of envelope specified by vendor.
>
> > not recommended, for production we have standerdised routers according to
> > the traffic/bandwidth.
>
> That's usual professional way of thinking - have the standards and
> follow them.
>
> > Is this 2811 you've running full BGP routes in production? I doubt it.
>
> I have a couple of lab 2811 that are equipped with 768MB and are
> happy with couple of feeds, fancy IPv6 multiprotocol stuff and other
> interesting features. In 768MB you can easily fit three-four full
> tables, you may however encounter sluggish console/vty access in
> times of convergence (even after BGP ATF integration, the next-hop
> tracking optimization, and other features that went into 12.4T).
> The RAM consumption if soft-reconfig is not used grows only by
> a couple percent with every new table added after the first one,
> so it's not that you need 8GB to store 16 tables.
>
> [1].
>
http://cisco.com/en/US/prod/collateral/routers/ps5854/ps5882/product_data_she
et0900aecd8016fa68_ps5854_Products_Data_Sheet.html
>
> --
> "Everything will be okay in the end. | #ukasz Bromirski
> If it's not okay, it's not the end. | http://lukasz.bromirski.net
>
>
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Received on Thu Dec 24 2009 - 01:45:02 ART