i386/142518: Problem on 8.0-STABLE with em and lagg

[DD]

>Number:         142518
>Category:       i386
>Synopsis:       Problem on 8.0-STABLE with em and lagg
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jan 09 06:30:03 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     DD
>Release:        8.0-STABLE
>Organization:
>Environment:
FreeBSD pppoe8.kraslan.ru 8.0-STABLE FreeBSD 8.0-STABLE #5: Sat Jan  9 11:23:13 KRAT 2010     root at pppoe8.kraslan.ru:/usr/obj/usr/src/sys/PPPoE8  i386
>Description:
Using this em(4) cards:

em0 at pci0:13:0:0:        class=0x020000 card=0x108c15d9 chip=0x108c8086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Intel Corporation 82573E Gigabit Ethernet Controller (Copper) (82573E)'
    class      = network
    subclass   = ethernet
em1 at pci0:14:0:0:        class=0x020000 card=0x109a15d9 chip=0x109a8086 rev=0x00 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Intel PRO/1000 PL Network Adaptor (82573L)'
    class      = network
    subclass   = ethernet

I configured a lagg interface (lagg0) to lacp on two em interfaces and Cisco, and configured a vlan with "vlandev lagg0" (vlan3). Under 7.2-STABLE on this host, there were no issues. Upon upgrading to 8.0-STABLE, the host became unable to communicate through either vlan interface. The host is still able to receive traffic; only outbound traffic are problematic, because packets not transfered on target hosts and on port of Cisco where host connected (two gi and etherchannel po) not seeing any mac.

>How-To-Repeat:
Boot a system containing two em(4) interfaces (may need to be the above chipset) with no network configuration in rc.conf and execute the following commands as root:

# ifconfig em0 link0 up
# ifconfig em1 link0 up
# ifconfig lagg0 create laggproto lacp laggport em0 laggport em1 up
# ifconfig vlan3 create vlan 3 vlandev lagg0
# ifconfig vlan3 <ip>/<mask> up

Generate traffic on the configured IP network (e. g., ping).
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: