Does 3750-12S GigE Port Support 10/100/1000Gbps or just 1000Gbps

[billsayegh]

Hi

Just want to confirm is the 3750-12S GigE Port support variable speed or is it fixed 1GigE only.

Thanks

Bill

[Jon Marshall]

Bill

Short answer is yes. Have a look at the Q&A for the 3750, the "Technology Overview" section, about 1/3 of the way down -

3750 Q&A

Jon

[billsayegh]

Thanks Jon

I checked the Q&A and it does not specifically state that the 3750-12S supports 10/100/1000.

What I could find is:

WS-C3750G-12S-E

• 12 SFP-based Gigabit Ethernet ports • 32 Gbps, high-speed stacking bus • Innovative stacking technology • 1 RU stackable multilayer switch • Enterprise-class intelligent services delivered to the network edge • IP Services Image installed provides full dynamic IP routing

Is the below refering to the 3750-S SFP ports, by stating the SFP port it is implicit that all SFP support 10/100/100?

Can the 1000BASE-T SFP support 10/100/1000 speeds?

A. Yes, the 1000BASE-T SFP can support 10/100/1000 speeds on the Cisco Catalyst 3750 Series Switches. Please refer to the 1000BASET-T SFP Compatibility Matrix for information about support on other Cisco products.

Regards

Bill

[Leo Laohoo · Accepted solution]

Only the GLC-TX will support 10/100/100.  If you want the SFP to support 100mbps (only) then you need to look at the following link: 

Cisco 100BASE-FX SFP Fast Ethernet Interface Converter on Gigabit SFP Ports
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6578/product_data_sheet0900aecd801ba88e_ps5000_Products_Data_Sheet.html

The Cisco 100BASE-FX SFP on Gigabit SFP ports is supported on Cisco Catalyst 3750, 3560, and 2970 series switches.