Re: BCM5341x

[Brough Turner <brough () netblazr com>]

Mike, Another practical question (for what you are seeking) is how much of
the control plane software (for features you seek) does Broadcom provide
with their reference design and how much must Ubiquiti write?

Thanks,
Brough

Brough Turner
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On Sun, Dec 25, 2016 at 10:48 AM, Joel Jaeggli <joelja () bogus com> wrote:

> Sent from my iPhone
>
> > On Dec 24, 2016, at 15:51, Mike Hammett <nanog () ics-il net> wrote:
> >
> > I've asked Broadcom directly, but being as though I don't have an intent
> to buy tens of thousands of chips (or any at all), I don't expect I'll hear
> back. I was hoping someone here would have some insight.
> > Do any of you know what functionality is available on those chips?
> That's the chip that powers the Ubiquiti 10G switches and I figured I would
> limit my most aggressive feature requests to things they can actually
> deliver with the platform as is.
> > Other than things you just assume a managed switch has like 802.1p and
> 802.1q, it mentions an advanced ContentAware™ Engine (which means?),
> IEEE1588 (sync over Ethernet), 802.1ag (OAM stuff), "Enhanced DoS attack
> statistics gathering" (which means?), "IPv4/IPv6 L3 packet classification"
> (which means?), etc.
> > I'm sure there's an array of things to ask about, but MLAG and S-Flow
> are at the top of my list at the moment.
>
> MCLAG is a control plane function.
>
> Sflow on devices that don't generate it in a distributed fashion is done
> but punting sampled packets to the control-plane for classification by an
> sflow agent. Sample rate is therefore contingent on adequate CPU and
> control-plane bandwidth.
>
> The greyhound switch SOC may be hampered by the amount of CPU available
> locally, but the 2MB packet buffer also is probably cause for caution.
>
> > https://www.broadcom.com/products/ethernet-connectivity/switch-fabric/
> bcm5341x/
> > -----
> > Mike Hammett
> > Intelligent Computing Solutions
> >
> > Midwest Internet Exchange
> >
> > The Brothers WISP