Subject: Re: fxp network driver and pauses question..
To: None <current-users@NetBSD.org>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 12/03/2004 16:10:22
In message <200412030941.53168.netbsdMLpostNO@SPAM.quake.ca>, Marc Tooley write
>I've been running NetBSD for.. well pretty much forever it seems, and
>recently (within the last year I guess) I've bumped into some troubles
>when running most NIC (Intel etherexpress to 3com 3c905) under the
>netbsd releases in that time period. Maybe it's just me but for some
>reason putting the card into promiscuous mode sometimes freezes all
>network operations for about a second or two. Similar UNIX-like systems
>don't show any tcpdump output for a moment, but they all continue to
>pass in/out network traffic from the rest of the system while the
>interface is being put into promisc.
I see similar effects. My assumption -- not validated by checking the
driver source -- is that the process of setting the promiscuous mode
bit involves a board reset.
--Steve Bellovin, http://www.research.att.com/~smb