[177328] in North American Network Operators' Group
Re: Recommended L2 switches for a new IXP
daemon@ATHENA.MIT.EDU (Mark Tinka)
Mon Jan 12 15:11:26 2015
X-Original-To: nanog@nanog.org
From: Mark Tinka <mark.tinka@seacom.mu>
To: nanog@nanog.org
Date: Mon, 12 Jan 2015 22:11:10 +0200
In-Reply-To: <26AB1A01-6D34-4C3A-80E8-1186C955DE5B@pch.net>
Reply-To: mark.tinka@seacom.mu
Errors-To: nanog-bounces@nanog.org
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On Monday, January 12, 2015 05:54:38 PM Bill Woodcock wrote:
> We see a lot of IXPs being formed or upgrading with Cisco
> Nexus 3524 switches, which have 48 1G-10G SFP/SFP+
> physical ports, license-limited to 24 active,
> upgradeable to 48 active.
>=20
> FWIW, 83% of IXPs have 48 or fewer participants, and 70%
> of IXPs have 24 or fewer participants. And the failure
> rate of chassis-based switches is _way_ higher than that
> of stand-alone switches. So we never recommend that an
> IXP buy a switch larger than necessary to accommodate 18
> months reasonably-projectable growth.
Would tend to agree with this approach, and the above.
Multi-rate (i.e., 1Gbps/10Gbps SFP/SFP+) standalone 1U=20
switches are reasonable these days. The issue you'll=20
probably run into with them is limited support for features=20
you find being implemented by larger exchange points (VPLS,=20
Sflow, e.t.c.), and quirks with the hardware that could=20
impact things like Layer 2 or Layer 3 filtering (especially=20
if they are using off-the-self silicon), e.t.c.
Test before you buy, in as far as you can anticipate your=20
(growth) needs.
Mark.
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