1000sx Fiber Port Negotiate Down to 100mb

[dabench]

Will a 1000sx fiber port negotiate down to 100mb if that is the max speed of the NIC?

 

[spidey07]

No. 1000base-sx is 1000base only. The other end must be 1000 Base-SX.

 

[dabench]

Thanks, that is what I thought. Now I just need to convince my boss.

 

[spidey07]

No convincing necessary. Just point out the 1000 in 1000 Base-SX. It's not 10/100/1000 Base-SX. It's 1000 Base-SX.

There's no 100 Base-FX in there. The clock is hard set as well as the signaling/encoding being completely different.

 

[ViviTheMage]

No convincing necessary. Just point out the 1000 in 1000 Base-SX. It's not 10/100/1000 Base-SX. It's 1000 Base-SX.

There's no 100 Base-FX in there. The clock is hard set as well as the signaling/encoding being completely different.

/thread

There is no other way to do it.

 

[spidey07]

/thread

There is no other way to do it.

It would just be easier to say they are two different network technologies. One is 802.3z and the other 802.3u (or something like that, I don't recall the exact ones for gige and fast e on fiber). It would be like plugging an OC3 into FDDI and expecting it to work.