Inter-exchange media types

Tue Apr 30 21:56:46 UTC 1996

> Peter Lothberg <roll at stupi.se> writes
>  * > Dtatacom tests were performed in the 10/100 setup. Obviously
>  * > the Fast ethernet switches had an advantage over the FDDI
>  * > switches since Fast ethernet and conventional ethernet work
>  * > with the same frame types. FDDI switches on the other hand
>  * > has to convert ethernet frames to FDDI frames and vice versa.
>  * > Todays NAPs in most cases are not 10/100 set up. It is more like
>  * > DS3/100/100 setup where routers are feeding traffic into the Gigaswitch
>  * > using FDDI and since HSSI and FDDI is using same MTU size, no
>  * > fragmentation is involved. 
>  * 
>  * Both 10 and 100 ethernet use 1500 byte mtu.
>  * 
>  * And remember that the characteristics of a loaded exchange is very
>  * diffrent between ethernet and token-ring.
> 
> And then there is always the possibility to run 100BT in
> full-duplex rather than half duplex...
> 

Asuming that you have a switch in the middle that can buffer the 
BW/Delay quota. How many of the 100Mbit ether switches has 4MB per
port in buffering?

(token out for lunch and the router buffers)

((and some fddi switches can talk full-duplex))

--Peter