Inter-exchange media types
roll at stupi.se
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))
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