Subject: Re: fxp network driver and pauses question..
To: None <>
From: Steven M. Bellovin <>
List: current-users
Date: 12/03/2004 16:10:22
In message <>, 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,