BCM5341x

Sun Dec 25 15:48:13 UTC 2016

Sent from my iPhone

> On Dec 24, 2016, at 15:51, Mike Hammett <nanog at 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/ 
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> ----- 
> Mike Hammett 
> Intelligent Computing Solutions 
> 
> Midwest Internet Exchange 
> 
> The Brothers WISP 
> 
> 