4 Oct
2018
4 Oct
'18
10:30 a.m.
On 10/04/2018 11:26 AM, Paul Koning via cctalk wrote:
That's sort of accurate. A quick look shows some
key differences: V2 adds
the "collision presence test" -- verifying the collision detect signal
is working. There is also the "jabber timer" -- a watchdog timeout that
stops excessively long frames. And V2 introduces the loopback protocol
(protocol type 90-00).
That mostly sounds like the frame formats are the same on the wire and
that the differences are in the protocols that use said frame.
The collision presence test is somewhat of an
interoperability issue:
if you attach a V1 transceiver to a V2 NIC, the NIC would complain on
every transmit that it didn't get the collision test signal.
That makes me wonder about the "heartbeat" switch that I see on older
AUI transceivers.
--
Grant. . . .
unix || die