[c-nsp] What is the lowest latency switch?

[Matt Stone]

No, you can get documentation on it. It's not even an officially announced product yet. It's supposed to be for ultra-low latency financial applications. Cisco hasn't said anything about it yet. A good article to read about it is on network world...

http://www.networkworld.com/news/2011/030311-cisco-data-center.html?fsrc=netflash-rss

Seeing as how it's not announced yet, which means ship dates are probably far from now, that doesn't help you much.

In my own opinion (with Cisco) your best  bet is the Nexus 5k.

---
Matthew M. Stone
Network Supervisor
City of Ruston
mstone at ruston.org

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Soon Lee
Sent: Wednesday, March 16, 2011 7:41 AM
To: 'Chris Evans'
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] What is the lowest latency switch?

Can I get any document what you say?

 

Thanks

 

Soon Lee

CCIE# 17724

 

From: Chris Evans [mailto:chrisccnpspam2 at gmail.com]
Sent: Wednesday, March 16, 2011 9:24 PM
To: Soon Lee
Cc: cisco-nsp at puck.nether.net; Peter Rathlev
Subject: Re: [c-nsp] What is the lowest latency switch?

 

Ciscos lowest latency box is the nexus 3000..

On Mar 16, 2011 8:17 AM, "Soon Lee" <leekorean at gmail.com> wrote:
> Hi
> 
> Lowest latency switch hahaha.
> 
> according to this
document(http://www.cisco.com/en/US/prod/switches/ps5718/ps6021/stac_report_
cisco_catalyst_4900m_10gige_switch.pdf)
> 
> Latency of C4900M is 19 microseconds.
> 
> I'm looking for any other vender switch which is low latency switch.
> 
> If you guys inform me then I will test it with Smartbit or something 
> like
that.
> 
> And cisco says,
> 
> Examples of Cisco Low-Latency Layer 2 Switches The Cisco Nexus 5000 
> Series access-layer switch is an example of a
low-latency cut-through single-stage fabric implementation that will meet the requirements of all except ultra-low latency applications. The Cisco Nexus 5000 Series uses VOQs to minimize port contention.
> Another platform that meets most low-latency application requirements 
> is
the Cisco Catalystcc 4900M Switch, a store-and-forward switch that fits in the data center access and distribution layers. The Cisco Catalyst 4900M uses a shared-memory architecture with an ultra-low-latency ASIC design.
> 
>
http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/white_pape
r_c11-465436.html
> 
> does it mean C4900M is lower latency switch than Nexus 5000 ?
> 
> 
> Thanks
> 
> Soon Lee
> CCIE# 17724
> 
> -----Original Message-----
> From: Peter Rathlev [mailto:peter at rathlev.dk]
> Sent: Wednesday, March 16, 2011 6:09 PM
> To: Soon Lee
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] What is the lowest switch?
> 
> On Wed, 2011-03-16 at 18:02 +0900, Soon Lee wrote:
>> What is the lowest switch?
> 
> The one at the bottom of the rack? ;-)
> 
>> I heard C4900M is low latency switch
>> 
>> Do you know any other vender?
>> 
>> Please let me know.
> 
> I guess the standard Cisco answer to low latency would be the 
> cut-through
switching Nexus platform. Nexus 5000 would probably fit the description. The
4900 is (AFAIK) store-and-forward and thus has slightly higher forwarding latency.
> 
> Beware that the latency differences are quite small and most peoply 
> have
no need to the lower.
> 
> --
> Peter
> 
> 
> 
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