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

magno massimo.magnani at gmail.com
Wed Mar 16 19:06:23 EDT 2011


Juniper qfx3500 is tested at < 1usec (store and forward) and rated < 4 watts
for 10ge. Have a look if you are interested.

Magno
Il giorno 16/mar/2011 21:16, "Nitzan Tzelniker" <nitzan.tzelniker at gmail.com>
ha scritto:
> We are using these switches for more them a year with almost no issues
> It is very stable as L2 and basic L3 (including GRE at line rate ) I didnt
> test the MPLS yet
> The latest version R1206 add a lot of features and at last you can do "|
> include ... " in any command and you can see drops on the output queue.
>
> Nitzan
>
> On Wed, Mar 16, 2011 at 19:25, Jeroen van Ingen <jeroen at zijndomein.nl
>wrote:
>
>> 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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