Subject: Re: microsoft ip stack & igmp?

From: [email-masked]
Date: Mon, 27 Apr 1998 16:02:39 -0400

We believe that the Win95 TCP/IP stack
does not inform the MAC NDIS driver when an
IP multicast address is no longer needed. That is,
it doesn't delete the corresponding MAC multicast
address.

     As a result, if the multicast is present on the
LAN, the packets will be sent up into the stack wasting
CPU.

     We believe this has been fixed in Win98.

     Hope this is helpful information.

     Doug Dillon............

Dave Thaler <[email-masked]> on 04/27/98 03:05:39 PM

To:   [email-masked] (Brad Parker)
cc:   [email-masked] (bcc: Doug Dillon/HNS)
Subject:  Re: microsoft ip stack & igmp?

Brad parker wrote:
> On another related topic, does anyone have specific knowledge about
> the IGMP in Microsoft Win95 & NT 4.0?
>
> The NT 4.0 stack appears to do IGMP V1 but when using PPP does not seem
to
> respond correctly to a "general query" sent after the link has cycled up
> & down.
I've forwarded this report to the Microsoft stack people, and
someone will look into this.  If it is a bug, then it should be
fixed in future releases (e.g. NT5 betas).
-Dave