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SFP vs. SFP+

Depends on the switch.  Some, like the 2960S and 4948E, have 1G/10G
ports.  They will, however, not operate at 4Gbps (that particular speed
was chosen to allow the core components to work for gigabit Ethernet,
OC48, 2G FC, and 4G FC).

Sam Chesluk
Network Hardware Resale

-----Original Message-----
From: Jimmy Changa [mailto:jimmy.changa007 at gmail.com] 
Sent: Thursday, February 17, 2011 3:39 PM
To: Sam Chesluk
Cc: Jason Lixfeld; <nanog at nanog.org>
Subject: Re: SFP vs. SFP+

I'm curious also. Could you use a SFP in a ten gig port if you only need
4gb of throughput?

Sent from my iPhone

On Feb 17, 2011, at 6:25 PM, "Sam Chesluk" <Sam at networkhardware.com>

> Jason - there are no SFP-10G parts based off of the original SFP; they
> all are based on the SFP+ standard, so there will be no issues with
> optic not being able to work at the full 10Gbps it's rated for.
> Sam Chesluk 
> Network Hardware Resale
> -----Original Message-----
> From: Jason Lixfeld [mailto:jason at lixfeld.ca] 
> Sent: Thursday, February 17, 2011 3:00 PM
> To: nanog at nanog.org
> Subject: SFP vs. SFP+
> I was asked today what the difference between SFP and SFP+ is.  I did
> really know, so I looked it up and it seems that the SFP spec provides
> capabilities for data rates up to 4.25Gb/s, whereas SFP+ supports up
> 10Gb/s.  Naturally, this made me wonder whether or not an optic that
> supported 10GbE always conformed to the SFP+ standard inherently, or
> there are cases where a 10GbE optic might only support the SFP
> thus having a 4.25Gb/s bottleneck.