Packets are counted to be deferred are due to
15 successive collisions to happen after first send attempt-
the CSMA/CD algorythm version used propose the cut of the back off
algorythm on the 16th attempt (first 10 attempts the timeout (ralli- the RND
function multiplier) is doubled each time-
up to 2^10=1024 times initial, then 5 attempts fixed- then drop the packet
(s)- count them as deferred
and go to start)- so this implies some not well-uderstood by many readers
Ethernet limitations-
such as summary number of 1024 nodes in collision domain and so on.
Ruslan Tchinyakov,
CCNP+Security, CCDP, MCSE
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
John Nemeth
Sent: Wednesday, July 19, 2000 5:52 AM
To: Erick; Luong, David; [EMAIL PROTECTED]
Subject: Re: Deferred Packets
On Nov 3, 5:28am, Erick wrote:
}
} > On a 10-half ethernet connection between two
} > routers, we are seeing deferred
} > packets happening as well as the normal usual
} > collisions. Are deferred
} > packets just normal as well? Is it expected in
} > ethernet media? Thanks in
Yes, it is normal and expected. However, too many, would be an
indication of an overloaded segment. I'm not totally sure what
constitutes "too many".
} Defered packets occur when the ethernet is too busy
} and the interface can't put the packet out on the
} wire, so the packet is dropped. This is normal. I
Bzzt, wrong! The packet isn't dropped, it's held and transmitted
when the wire is free.
}-- End of excerpt from Erick
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