Does 4500x-16s support 10/100 network devices? My vendor says that it is not able to and one of my devices can only support 10/100.


You can use the GLC-T or GLC-TE SFP (1000BASE-T) in your switch which gives you 10/100/1000 copper interface. This SFP supports Category 5, 5e, 6, or 6a UTP/FTP copper cables.

You can see all supported SFP's for the Cisco 4500X here:


  • Thanks. I'm confused with this statement on Cisco website which sounds contradictiory to me - "When you install the GLC-T (1000Base-T) SFP transceiver, 10/100 Mbps with auto negotiation is not supported." link. Yet the feature list says "Forced 10/100 Autonegotiation" is supported. So does using the GLC-T SPF transceiver allow a 10/100 ethernet device to connect to the 4500X? Btw, my 4500X only has fibre optics ports so my vendor used a small silver color adapter for my 10/100 device.
    – Joshua
    Aug 19 '17 at 4:38
  • Wouldn't be the first time Cisco wrote something contradictory. Worked fine with 100 Mbit full duplex, tested yesterday.
    – user36472
    Aug 19 '17 at 8:33
  • May I know what version of IOS are you using?
    – Joshua
    Aug 19 '17 at 10:01
  • @Joshua 3.8.4E MD
    – user36472
    Aug 19 '17 at 11:05

Not likely. Cisco list no 100 Mbit modules.

Edit: the 1000BASE-T SFP should be able to link 10/100 Mbit/s.

  • Well while you are right about the modules that are not supported, the GLC-T SFP is still supported on the 4500X series, which gives the 10/100/1000 cobber capability. SFP+ is compatible with all normal SFP modules.
    – user36472
    Aug 18 '17 at 13:43
  • Doesn't the 1000BASE-T SFP support 10/100 Mbps?
    – Ron Maupin
    Aug 18 '17 at 13:46
  • @RonMaupin yay was faster than you!
    – user36472
    Aug 18 '17 at 13:47
  • @Cown, you need to teach Ron Trunk your trick :)
    – Ron Maupin
    Aug 18 '17 at 13:49
  • @RonMaupin ROFL
    – user36472
    Aug 18 '17 at 13:52

1000BASE-T SFP is recommended, which can well support both 10 and 100 Mbps

  • 1
    This answer has already be given by @Cown (but more detailed, and it was accepted). You should consider upvoting the existing answer rather than creating a not-this-good duplicate.
    – JFL
    Sep 15 '17 at 14:51

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