Re: BCM5341x

[Joel Jaeggli <joelja () bogus com>]

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