Can I use 100Mbs SPF modules on the Cisco 4948 switch?

[kevin.d.dibb]

Can I use 100Mbs SPF modules on the Cisco 4948 switch?

I have a GLC-GE-100FX SPF module and when I do a 'show interface' it says media type is unknown.

I tried and it doesn't connect too a 100Mbs switch, or can these SFP ports only be used for gigabit fiber modules?

According to this page it should work, right?

http://www.cisco.com/c/en/us/td/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL632702.html

[Reza Sharifi]

Do you have the correct IOS (15.1(1)SG) installed?

[kevin.d.dibb]

It has version ROM: 12.2(31r)SGA1

bootflash:cat4500-ipbasek9-mz.122-54.SG.bin

[Madhukrishnan Gopinathan Nair]

Hi ,

Have you upgraded to 15.1(1)SG and check?

Thanks,

Madhu

[kevin.d.dibb]

I upgraded the IOS via TFTP to this version:

cat4500-ipbasek9-mz.150-2.SG10.bin

But it still doesn't recognize the 100Mb SPF module.

[acampbell]

Hello Kevin,

Looking at the data sheet:-
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4900-series-switches/product_data_sheet0900aecd8017a72e.html

"The Cisco Catalyst 4948 offers 48 ports of wire-speed 10/100/1000BASE-T with four alternative wired ports that can accommodate optional 1000BASE-X Small Form-Factor Pluggable (SFP) optics.[1] Exceptional reliability and serviceability are delivered with optional internal AC or DC 1+1 hot-swappable power supplies and a hot-swappable fan tray with redundant fans (Figures 1 and 2)."

The SFP slots are GIG only

Further down the doc you see a table for supported SFPs

If your switch is a 4948E then from your own link table 5

Catalyst 4900 Series

WS-C4948E WS-X4908

GLC-GE-100FX

—

15.1(1)SG

Your SFP should be supported.

HTH
Reards
Alex

[kevin.d.dibb]

Maybe my problem is that it's a WS-C4948-S and not a 4948-E.

[walter baziuk]

hello cisco make two versions, be carefull

GLC-GE-100FX

GLC-FE-100FX

they are VERY different

Most do NOT work on a router

most do work an a switch

why, ask cisco (;