kern/167006: epair Device Does Not Support Span

Shawn Webb shwebb at
Mon Apr 16 17:30:02 UTC 2012

>Number:         167006
>Category:       kern
>Synopsis:       epair Device Does Not Support Span
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr 16 17:30:01 UTC 2012
>Originator:     Shawn Webb
>Release:        FreeBSD 9-STABLE
Wayfair LLC
FreeBSD fbsd-sec 9.0-STABLE FreeBSD 9.0-STABLE #8 r234294+e3d9fa1: Mon Apr 16 10:15:20 MDT 2012     shawn at fbsd-sec:/usr/obj/src/sys/SEC  amd64
The epair(4) device does not support being set as a span device in a bridge. ifconfig reports "ifconfig: BRDGADDS epair0a: Device busy" error when trying to set up the device as a span port.
As root:
ifconfig bridge0 create
ifconfig bridge0 up
ifconfig epair0 create
ifconfig bridge0 addm epair0a
ifconfig epair0a up
ifconfig bridge0 span epair0a # <- You will get an error here: "ifconfig: BRDGADDS epair0a: Device busy"


More information about the freebsd-bugs mailing list