07-14-2006 01:25 PM - edited 03-03-2019 04:03 AM
The GBIC is inserted in a 3508 switch port and the FE port comes from a 2924FX switch. Can 1000BaseT GBIC operate in 100m mode? Thanks.
-Jim
07-14-2006 02:08 PM
No, it can't.
1000{S,L,Z}X uses different signaling than 100BASE-FX
You can buy fiber-to-copper media converts though, and they work pretty well.
Good Luck
Scott
07-17-2006 05:49 AM
Thanks for the info. I'm not using fiber cables; it is a copper based GBIC (1000BaseT) to a 100baseT FE port. I should rephrase my questin: Can 1000BaseT GBIC operate in 10m or 100m mode?
07-17-2006 08:38 AM
Yes, it should be able to "downshift" to at least 100 meg, I believe.
Some chipsets also can drop to 10meg, but I'm not sure of the Cisco flavor is capable of doing so.
07-18-2006 05:07 PM
Correct. It depends on the manufacterer of the gbic (sfp), and the chipset behind the sfp on the switch.
peter
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