Date: Sun, 12 Mar 2006 17:36:58 GMT From: Stephen Trovato <strovato@cdeducation.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/94390: poor network performance after promiscuous mode is enabled & disabled Message-ID: <200603121736.k2CHawv5078558@www.freebsd.org> Resent-Message-ID: <200603121740.k2CHep81005605@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 94390
>Category: kern
>Synopsis: poor network performance after promiscuous mode is enabled & disabled
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Mar 12 17:40:50 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Stephen Trovato
>Release: 6.0-RELEASE
>Organization:
Diocese of Columbus Dept for Ed
>Environment:
FreeBSD serenity.localdomain 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Wed Nov 2 19:07:38 UTC 2005 root@rat.samsco.home:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
Enabling promiscuous mode causes a permanent network performance drop even after it is turned off.
Hardware description:
K8M800-M7A motherboard
Sempron 2800+ w/amd64
embedded VIA 10/100 (see below)
dmesg output:
vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xdc00-0xdcff mem 0xf6001000-0xf60010ff irq 23 at device 18.0 on pci0
miibus0: <MII bus> on vr0
rlphy0: <RTL8201L 10/100 media interface> on miibus0
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
vr0: Ethernet address: 00:14:2a:f5:3a:03
ifconfig output:
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::214:2aff:fef5:3a03%vr0 prefixlen 64 scopeid 0x1
inet X.X.X.131 netmask 0xffffff00 broadcast X.X.X.255
ether 00:14:2a:f5:3a:03
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
>How-To-Repeat:
Steps to reproduce:
1) ifconfig vr0 promisc
2) ifconfig vr0 -promisc
3) Network performance is now half of what it was
>Fix:
Bringing the interface down and back up with ifconfig does not resolve the problem, but a reboot does.
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200603121736.k2CHawv5078558>