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Date:      Thu, 2 Apr 2015 13:01:42 +0200
From:      Mark Schouten <mark@tuxis.nl>
To:        freebsd-net@freebsd.org
Subject:   Re: Urgent matter: LACP trunk stops distributing
Message-ID:  <2042783266-15365@kerio.tuxis.nl>
In-Reply-To: <1953214074-10699@kerio.tuxis.nl>

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Hi,


So I've changed the configuration last night, eliminating the possibility t=
hat the issue was LACP. All traffic was handled by the single igb interface=
. It didn't help, at all.


This morning the interface stopped working, without any form of messages an=
d started working again after a few minutes. Then, some minutes later it st=
opped again, to resume after a few minutes.


So now I plugged the switch into an em-port and I tried to move the vlan in=
terfaces to the em-interface. That worked, partially. The server kept the o=
ld mac-address in the arp-table. Even after I deleted the vlan interface.


I rebooted the box, and so far so good. But still, any help is appreciated.


Met vriendelijke groeten,

--=C2=A0
Kerio Operator in de Cloud? https://www.kerioindecloud.nl/
Mark Schouten  | Tuxis Internet Engineering
KvK:=C2=A061527076=C2=A0| http://www.tuxis.nl/
T: 0318 200208 | info@tuxis.nl



 Van:    Mark Schouten <mark@tuxis.nl>=20
  Aan:     <freebsd-net@freebsd.org>=20
  Verzonden:    1-4-2015 12:07=20
  Onderwerp:    Urgent matter: LACP trunk stops distributing=20

Hi,=20
=20
I've got an urgent matter on my hands, my FreeBSD iScsibox has dropped it's=
 LACP trunk twice in the last 24 hours, which causes a whole lot of issues =
on my VPS cluster, using that storage. =20
=20
It's a FreeBSD box with two igb-interfaces in an LACP trunk with jumboframe=
s and vlans. If the connection drops, the only thing I see is:=20
=20
Apr=C2=A0 1 10:37:18 zstore02 kernel: igb0: Interface stopped DISTRIBUTING,=
 possible flapping=20
Apr=C2=A0 1 10:37:28 zstore02 kernel: igb1: Interface stopped DISTRIBUTING,=
 possible flapping=20
=20
The switch has nothing to say, so it doesn't seem that there are acual link=
flaps. I have a feeling that it's this LACP trunk that goes haywire somewhe=
re on the FreeBSD side. If anyone can help me with this, I'd be grateful. I=
f someone (preferably EU-based) wants to help out professionally as a consu=
ltant, that would be fine too. Or if anyone knows someone in .nl that offer=
s this level of expertise on consultingbase, let me know.=20
=20
I'm running 10.1-RELEASE on the box, see the (AFAICS) relevant config below=
. The switch is a Brocade ICX6430.=20
=20
[root@zstore02 ~]# ifconfig lagg0=20
lagg0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 90=
00=20
=C2=A0=C2=A0=C2=A0 options=3D4019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VL=
AN_HWCSUM,TSO4,VLAN_HWTSO>=20
=C2=A0=C2=A0=C2=A0 ether 0c:c4:7a:12:13:dc=20
=C2=A0=C2=A0=C2=A0 nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>=20
=C2=A0=C2=A0=C2=A0 media: Ethernet autoselect=20
=C2=A0=C2=A0=C2=A0 status: active=20
=C2=A0=C2=A0=C2=A0 laggproto lacp lagghash l2,l3,l4=20
=C2=A0=C2=A0=C2=A0 laggport: em1 flags=3D0<>=20
=C2=A0=C2=A0=C2=A0 laggport: em0 flags=3D0<>=20
=C2=A0=C2=A0=C2=A0 laggport: igb1 flags=3D1c<ACTIVE,COLLECTING,DISTRIBUTING=
>=20
=C2=A0=C2=A0=C2=A0 laggport: igb0 flags=3D1c<ACTIVE,COLLECTING,DISTRIBUTING=
>=20
=20
[root@zstore02 ~]# sysctl -a | grep lacp=20
net.link.lagg.lacp.debug: 0=20
net.link.lagg.0.lacp.lacp_strict_mode: 1=20
net.link.lagg.0.lacp.debug.rx_test: 0=20
net.link.lagg.0.lacp.debug.tx_test: 0=20
=20
=20
=20
Met vriendelijke groeten,=20
=20
--=C2=A0=20
Kerio Operator in de Cloud? https://www.kerioindecloud.nl/=20
Mark Schouten =C2=A0| Tuxis Internet Engineering=20
KvK:=C2=A061527076=C2=A0| http://www.tuxis.nl/=20
T: 0318 200208 | info@tuxis.nl

=

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