Hi Mark,
Wow, let me see if I can dust off the date. The cards I am
referring to were circa 1993-1995. I can't recall coming across
an ethernet chip after 1995 that did not have some level of
multicast filtering ability. YMMV...Brian
On Mar 1, 2005, at 7:38, Mark Smith wrote:
Hi Brian,
On Tue, 1 Mar 2005 07:21:37 -0500 Brian Haberman <[EMAIL PROTECTED]> wrote:
My experience with ethernet cards and drivers is that if they don't have multicast capability, they map MAC addresses with the group bit on to FF:FF:FF:FF:FF:FF prior to transmit.
On the receive side, these cards would go into promiscuous receive mode and then filter at the device driver.
Are you able to put a rough date of manufacture on those cards/chipsets
? I've recently done a bit of looking into the chips on the old NE2K
style cards (the NatSemi NS8390D chipset), and even they have a
multicast filtering capability. I first encountered them on NICs in 1992
(if not earlier, maybe 1990 or so), so I'm curious how much earlier
before that multicast was implemented the way you have stated.
Thanks, Mark.
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