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

[Ziv Leyes]

Even if you had the time to test them, how would you exactly be able to confirm the specs? Do you have a way to measure the <1.9 µsec forwarding latency and confirm it's correct?

Just wondering...

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jeroen van Ingen
Sent: Wednesday, March 16, 2011 7:25 PM
To: jm at ilk.net
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] What is the lowest latency switch?

Hi,
> What about "H3C" "3com" S5820X ?
>
> May be renamed or renumbered to hp procurve, but spec says:
>
> "...
>   Additionally, in order to reduce
>   latency in the network core or data center environment, the
>   S5820X features cut-through switching as well as store and
>   forward mode switching.
>   ...
>   Forwarding Latency<1.9 µsec (FIFO 64-byte packets)
>   ...
> "
>
> For a<  200W (under full load) device
> (compared to the 1100W of my 4900M's ) this sounds good for Layer2 
> device.
>
> Any experience with that box ?
>    

Well, I have three of those on my desk right now, but to be honest I haven't had much time to test them. I'm trying them out for basic L2 switching, a bit of routing and a small amount of EoMPLS.

Specs & docs look good, pricing seems OK, but as "experience" with the box goes I've only configured an address on them and performed a software upgrade.

If you have specific questions, don't hesitate to ask, perhaps I can get the answers quickly.


Regards,
Jeroen

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