is the GLC-GE-100FX SFP compatible with WS-C3850-12XS-E?

[curtis03_2]

Guys

I'm trying to connect two 3850 switch stacks across OM1 MM fibre - because of distance i require 100Mb SFPs

Can anyone confirm are the GLC-GE-100FX SFPs compatible with WS-C3850-12XS-E devices?

According to the 'Cisco 100-Megabit Ethernet SFP Modules Compatibility Matrix (Revised: January 25, 2017)' only the WS-C3850-12S will support these.

Does this mean there is no compatible 100Mb SFP?

Many thanks in advance!

[Marvin Rhoads]

Curtis,

The SFP+ ports on the base XS 3850 models are unfortunately not compatible with 100 Mbps SFPs.

You would have to use either a network module (C3850-NM-4-1G or C3850-NM-2-10G) or else an external device to convert for compatibility with your inter-switch link

[curtis03_2]

Many thanks for your help Marvin!

[Marvin Rhoads · Accepted solution]

You're welcome. Please mark your question as answered if it has been.

[curtis03_2]

Hi Marvin

Can you please confirm is MFEFX1 (100BASE-FX) the correct SFP compatible with SG300-10SFP small business switch, to support 100Mb MM fibre 1310 nm wavelength, support up to 2 km?

The MFEFX1 quick start guide document does not list this switch as compatible only the SG300-10, SG300-10P and SG300-10MP devices are listed?

thanks

[l-mathews]

have a similiar problem, with 9407 Chassis Sup 1B, Can GLC-GE-100FX= SFP connect to SFP/SFP+/QSFP  Uplink ports on the Supervisor Chassis?

[fiberstorejames]

Does this mean there is no compatible 100Mb SFP?

No, there is no compatible 100M SFP for WS-C3850-12XS-E as WS-C3850-12XS-E switches only have 12 10Gigabit SFP+ ports, which are not auto-negotiate with 100Mb SFPs. So it is better to buy the 10G SFP+ modules. 

[rcampo]

This seems to conflict with the Cisco 100Mb tranceiver compatabillity matrix. 

https://www.cisco.com/c/en/us/td/docs/interfaces_modules/transceiver_modules/compatibility/matrix/100MB_Tx_Matrix.html

3850's show compatability with the GLC-GE-100FX=.  My only issue is the WS-3850-48XS is not referenced at all.  Need clarify from Cisco on that one.