10Mbit interfaces on 100Mbit network

weird_dave · 5 Sep 2016 at 08:33

If I have 2 10Mbit devices each connected to a different 100Mbit switch and a cable between the switches, does the data between the switches transfer the data at 10 or 100Mbit? I can't seem to find information on this

I suspect it transfers at 100Mbit, I can't test it tho as I haven't got the devices yet.

weird_dave · 5 Sep 2016 at 09:00

It still isn't clear to me if the packets between the switches are at 10M or 100M. From what I have read, switches analyse packets and drop bad ones, so they must be buffering, which would allow for retransmission at a higher rate between the switches, but do they?
If they retransmitted at 10MBit they would use 10x the bandwidth than is necessary

weird_dave · 5 Sep 2016 at 10:21

I was hoping that would be the case, there will be other (yet to be determined) stuff connected to the switches and sharing the bandwidth of the connection between them.

weird_dave · 5 Sep 2016 at 10:24

ov_sjo said:
It'll be 10 mbps, unless the inter-switch link is over-utilised, which means it could drop below 10 (from those clients).

Really? That would be rubbish

I may have to use 100MBit devices if that is correct.

weird_dave · 5 Sep 2016 at 11:17

That's what I was hoping for, I just can't find any document that specifically states it.