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New Member

GBIC and SPF Modules

There has been some discussion on these products and what is needed for Fiber connectivity. I know some of the switches come with SPF ports which can accept fiber. However, there seems to be some confussion as to whether or not a GBIC module is needed in addition to the SPF module for switch connectivity to fiber.

If I have a switch with SPF ports, do I need a GBIC module in order to create a point to point connection over fiber?

Thanks

1 ACCEPTED SOLUTION

Accepted Solutions
Purple

Re: GBIC and SPF Modules

Hi,

The following URLs may help:

http://en.wikipedia.org/wiki/Small_form-factor_pluggable_interface

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci753546,00.html

http://www.metrobility.com/news/index.asp?display=detail&id=137

The GBIC and SFP are two completely different hardware components that perform the same type of function. The SFP is simply a smaller version of the GBIC.

Also consider this link:

http://www.cisco.com/en/US/products/ps5855/products_installation_guide_chapter09186a00802ccf2f.html

In figure 1 of the above page, you will see an SFP module being inserted directly into an SFP slot (there is no GBIC here at all?

Is that proof enough ?

Hope that helps.

Pls remember to rate posts.

Regards,

Paresh.

5 REPLIES
Purple

Re: GBIC and SPF Modules

Hi,

No, you did not need GBICs in addition to SFPs for the same port - you use one or the other. Just make sure you get appropriate cabling to suit whichever option you go with.

Hope that helps - pls rate posts that help.

Regards,

Paresh

VIP Purple

Re: GBIC and SPF Modules

Hello,

on a side note, SFP stands for "small form pluggable"; basically, it is a smaller formed GBIC . You plug them into the switch just like the older GBICs; they will obviously take different patch cables to connect to them. You can connect SFPs and GBICs using an interconnect cable...

Regards,

GP

New Member

Re: GBIC and SPF Modules

Is there any where on this site, or any site, that would show the proper configuration when using fiber, SFPs and GBICs?

Also, from my discussions with my counterparts I am told the GBIC is needed because it houses the laser transceiver and the SFP modules do not. Therefore to send a signal on fiber from a switch with an SFP module I need the GBIC in order to do it. I am just not buying it, but need some documentation to prove this.

Purple

Re: GBIC and SPF Modules

Hi,

The following URLs may help:

http://en.wikipedia.org/wiki/Small_form-factor_pluggable_interface

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci753546,00.html

http://www.metrobility.com/news/index.asp?display=detail&id=137

The GBIC and SFP are two completely different hardware components that perform the same type of function. The SFP is simply a smaller version of the GBIC.

Also consider this link:

http://www.cisco.com/en/US/products/ps5855/products_installation_guide_chapter09186a00802ccf2f.html

In figure 1 of the above page, you will see an SFP module being inserted directly into an SFP slot (there is no GBIC here at all?

Is that proof enough ?

Hope that helps.

Pls remember to rate posts.

Regards,

Paresh.

New Member

Re: GBIC and SPF Modules

Yep, this is what I was looking for.

Thank you.

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