>At 05:23 PM 8/23/01, Howard C. Berkowitz wrote:
>> >Most are full duplex, so in those cases, no you shouldn't..
>> >
>> >Brian "Sonic" Whalen
>> >Success = Preparation + Opportunity
>> >
>> >
>> >On Thu, 23 Aug 2001, Wright, Jeremy wrote:
>> >
>> > > Can you have collisions on a serial link? Thanks again.
>> >
>>
>>
>>I'm in general agreement, but be aware that you might run into IBM
>>BSC or SDLC networks that use polled multidrop on half-duplex
>>facilities. Rare now, but you might see them on things like
>>automatic teller machines, point-of-sale terminals, etc. -- those
>>being critical business applications that work, so no one wants to
>>fiddle with them.
>>
>But they still wouldn't see collisions, which is an Ethernet concept. I
>used to know BISYNC and could explain how the devices take turns, but I
>sure can't remember any more! ;-) It wasn't akin to CSMA/CD or CSMA/CA,
>however.
---------------------------------------> from controlling host (simplex)
>The answer to the question is that you should not see collisions on a
>serial link. Cisco uses a "template" for the output of show interface
>commands that does not remove statistics that are irrelevant to the
>interface being shown. So show int s0 does include a collision count but
>it's always zero.
>
>As a CCIE (even a CCNA?! ;-) you would be expected to know to ignore that
>count unless you happened to see a non-zero value, in which case you would
>scratch your head, but not be expected to explain it, since it would be
>completely illogical.
>
>Priscilla
>________________________
>
>Priscilla Oppenheimer
>http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=17082&t=17050
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