[193210] in North American Network Operators' Group
Re: BCM5341x
daemon@ATHENA.MIT.EDU (Joel Jaeggli)
Sun Dec 25 10:48:27 2016
X-Original-To: nanog@nanog.org
From: Joel Jaeggli <joelja@bogus.com>
In-Reply-To: <115402558.94042.1482623479606.JavaMail.mhammett@ThunderFuck>
Date: Sun, 25 Dec 2016 07:48:13 -0800
To: Mike Hammett <nanog@ics-il.net>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Sent from my iPhone
> On Dec 24, 2016, at 15:51, Mike Hammett <nanog@ics-il.net> wrote:
>=20
> I've asked Broadcom directly, but being as though I don't have an intent t=
o buy tens of thousands of chips (or any at all), I don't expect I'll hear b=
ack. I was hoping someone here would have some insight.=20
>=20
> Do any of you know what functionality is available on those chips? That's t=
he 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 t=
he platform as is.=20
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> Other than things you just assume a managed switch has like 802.1p and 802=
.1q, it mentions an advanced ContentAware=E2=84=A2 Engine (which means?), IE=
EE1588 (sync over Ethernet), 802.1ag (OAM stuff), "Enhanced DoS attack stati=
stics gathering" (which means?), "IPv4/IPv6 L3 packet classification" (which=
means?), etc.=20
>=20
> I'm sure there's an array of things to ask about, but MLAG and S-Flow are a=
t the top of my list at the moment.=20
MCLAG is a control plane function.=20
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-plan=
e bandwidth.
The greyhound switch SOC may be hampered by the amount of CPU available loca=
lly, but the 2MB packet buffer also is probably cause for caution.
> https://www.broadcom.com/products/ethernet-connectivity/switch-fabric/bcm5=
341x/=20
>=20
>=20
>=20
>=20
> -----=20
> Mike Hammett=20
> Intelligent Computing Solutions=20
>=20
> Midwest Internet Exchange=20
>=20
> The Brothers WISP=20
>=20
>=20
