Re: network switch benchmark comparision
On a related note... anyone know of any comparisons of lower-end Gig-E
switches? I bought one recently and tried to find a good one, but the
latency seems really crappy (> 1ms, unloaded).
On Mon, Jul 02, 2007 at 06:51:51PM -0500, Travis wrote:
> On Mon, Jul 02, 2007 at 04:48:46PM -0500, Robert Parkhurst wrote:
> > I'm looking into network switches at work. We're standardized on D-Link GbE
> > "workgroup" switches, but I don't think we're getting a lot out of them
> > (i.e.
> > general LAN use seems to go slower than it should being GbE). I'm curious
> > if anyone knows of any sort of benchmark comparisions between various
> > switches (like D-Link, Linksys, Cisco, Extreme, Netgear, etc.).
>
> Ultimately, you have two things to really worry about: how fast/large the
> switch fabric is on the backplane and how many uplinks you have between
> your switches to your cores.
>
> From the descriptions of the D-link hardware that I see on their website, it
> looks like their switch fabric is capable of driving all end-user ports at full
> duplex at the same time (so, 24 Gb ports has a 48Gbps switch fabric). I can't
> tell if their uplink ports can be used in addition to all ports or if they
> "piggyback" on some of the copper ports (for example, I know Nortel baystacks
> treat ports 47 and 48 as either copper or fiber uplinks, but not both
> at the same time).
>
> I think the real issue you're going to be dealing with is the number of
> uplinks you're sticking on each switch and being able to trunk your uplinks
> together for increased bandwidth. One thing to realize is that when you're
> doing trunking like this, any one system contacting another system on the
> other side of the uplink is still only going to get a maximum of 1Gb/s.
> Link aggregation gives you the ability to expand bandwidth overall so you
> can have more concurrent data streams. (eg, a 4Gb trunk can have four 1Gb
> streams going, not one 4Gb stream).
>
> BTW, I was looking at the "Web Smart" line of Gigabite D-link switches when
> I responded to this, just so you have a reference to what I was looking at.
>
>
> Probably doesn't help answer your question directly, but gives you an idea
> of what to look for in a switch and where your bottlenecks are going to
> appear first.
>
>
> Travis
> --
> Travis Campbell
> hcoyote@...
> _______________________________________________
> ALG-technical mailing list http://austinlug.org/cgi-bin/mailman/listinfo/alg-technical
--
Decibel!, aka Jim C. Nasby, Database Architect decibel@...
Give your computer some brain candy! www.distributed.net Team #1828
On a related note... anyone know of any comparisons of lower-end Gig-E
switches? I bought one recently and tried to find a good one, but the
latency seems really crappy (> 1ms, unloaded).
On Mon, Jul 02, 2007 at 06:51:51PM -0500, Travis wrote:
> On Mon, Jul 02, 2007 at 04:48:46PM -0500, Robert Parkhurst wrote:
> > I'm looking into network switches at work. We're standardized on D-Link GbE
> > "workgroup" switches, but I don't think we're getting a lot out of them
> > (i.e.
> > general LAN use seems to go slower than it should being GbE). I'm curious
> > if anyone knows of any sort of benchmark comparisions between various
> > switches (like D-Link, Linksys, Cisco, Extreme, Netgear, etc.).
>
> Ultimately, you have two things to really worry about: how fast/large the
> switch fabric is on the backplane and how many uplinks you have between
> your switches to your cores.
>
> From the descriptions of the D-link hardware that I see on their website, it
> looks like their switch fabric is capable of driving all end-user ports at full
> duplex at the same time (so, 24 Gb ports has a 48Gbps switch fabric). I can't
> tell if their uplink ports can be used in addition to all ports or if they
> "piggyback" on some of the copper ports (for example, I know Nortel baystacks
> treat ports 47 and 48 as either copper or fiber uplinks, but not both
> at the same time).
>
> I think the real issue you're going to be dealing with is the number of
> uplinks you're sticking on each switch and being able to trunk your uplinks
> together for increased bandwidth. One thing to realize is that when you're
> doing trunking like this, any one system contacting another system on the
> other side of the uplink is still only going to get a maximum of 1Gb/s.
> Link aggregation gives you the ability to expand bandwidth overall so you
> can have more concurrent data streams. (eg, a 4Gb trunk can have four 1Gb
> streams going, not one 4Gb stream).
>
> BTW, I was looking at the "Web Smart" line of Gigabite D-link switches when
> I responded to this, just so you have a reference to what I was looking at.
>
>
> Probably doesn't help answer your question directly, but gives you an idea
> of what to look for in a switch and where your bottlenecks are going to
> appear first.
>
>
> Travis
> --
> Travis Campbell
> hcoyote@...
> _______________________________________________
> ALG-technical mailing list http://austinlug.org/cgi-bin/mailman/listinfo/alg-technical
--
--
Decibel!, aka Jim C. Nasby, Database Architect decibel@...
Give your computer some brain candy! www.distributed.net Team #1828
>>> Mark R Ward <
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