lagg interface doesn't work

[Rainer Duffner]

Hi,

I’m trying to get a lagg(4) setup going.

This has previously been a linux host, which had to be replace on short notice.

I’ve rarely used lagg(4).


Basically, we have two trunk-ports with a bunch of clans that needs to go over two 10G interface (bxe(4)).

The switch is a Cisco switch, I don’t know the exact firmware revision - I don’t configure the switches here, this a cut and paste from the admin.

The previous Linux server used „passive“ mode - it seems FreeBSD does not do that?

***

Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M),

!

!

interface Port-channel121
description server-prod.front
switchport
switchport trunk allowed vlan 2000,2002,2004,2007,2012,2014
switchport mode trunk
mtu 9170
spanning-tree portfast trunk
end

!

!

interface TenGigabitEthernet1/1/15
description server-prod.front-1.1
switchport trunk allowed vlan 2000,2002,2004,2007,2012,2014
switchport mode trunk
mtu 9170
channel-group 121 mode active
spanning-tree portfast trunk
end

!

interface TenGigabitEthernet2/1/15
description server-prod.front-2.1
switchport trunk allowed vlan 2000,2002,2004,2007,2012,2014
switchport mode trunk
mtu 9170
channel-group 121 mode active
spanning-tree portfast trunk
end


On the FreeBSD-side (11.1-AMD64), I have:
(based on the excellent examples here: https://high5.nl/freebsd-lagg-vlan-ipfw-mini-howto)

ifconfig_bxe0="up"
ifconfig_bxe1="up"
cloned_interfaces="lagg0 vlan2012 vlan2007 vlan2002 vlan2004"
#cloned_interfaces="lagg0 vlan2004"
ifconfig_lagg0="up laggproto lacp laggport bxe0 laggport bxe1"

ifconfig_vlan2004="inet ip1 netmask 255.255.255.192 vlan 2004 vlandev lagg0"
ifconfig_vlan2012="inet ip2 netmask 255.255.255.192 vlan 2012 vlandev lagg0 "
ifconfig_vlan2007="inet ip3 netmask 255.255.255.240 vlan 2007 vlandev lagg0"
ifconfig_vlan2002="inet ip4 netmask 255.255.255.192 vlan 2002 vlandev lagg0"


in sysctl.conf, I added:
net.link.lagg.lacp.default_strict_mode=0


Now, this works as long as I put one of the VLAN-interfaces into promiscuous mode.


When I stop tcpdump, I get messages like 

***
Interface stopped  DISTRIBUTING, possible flapping
***

and it really stops doing anything.



Any ideas?


Regards,
Rainer