Subject: Re: how to mix bridges and bonding inc. vlans correctly on Kernel > 3.10

From: Veaceslav Falico <[email-masked]>
Date: Wed, 13 Nov 2013 17:21:36 +0100

On Wed, Nov 13, 2013 at 04:17:33PM +0100, Stefan Priebe - Profihost AG wrote:
>Am 13.11.2013 16:05, schrieb Vlad Yasevich:
>> On 11/13/2013 09:20 AM, Stefan Priebe - Profihost AG wrote:
>>> Hi Falico,
>>> Am 13.11.2013 15:12, schrieb Veaceslav Falico:
>>>> On Wed, Nov 13, 2013 at 02:58:40PM +0100, Stefan Priebe - Profihost AG
>>>> wrote:
>>>>> Hello,
>>>>>
>>>>> while my vlans, bridging and bonding stuff was working until 3.9 i
>>>>> never
>>>>> thought about how it is right. So maybe i was always wrong.
>>>>>
>>>>> I've this:
>>>>>
>>>>> eth2
>>>>>      \
>>>>>       -- bond1 -- vmbr1
>>>>>      /
>>>>> eth3
>>>>>
>>>>> This works fine and as expected now i want to have a vlan using the
>>>>> bonding and using a bridge.
>>>>>
>>>>> I the past i had this:
>>>>> eth2
>>>>>      \
>>>>>       -- bond1 -- vmbr1
>>>>>      /              \
>>>>> eth3                 \ vmbr1.3000
>>>>>                            \ ---- tap114i1
>>>>>
>>>>> This was working fine until 3.9.X since 3.10. Right now using 3.10 i
>>>>> need to put eth2 and eth3 into promisc mode to get it working ;-( this
>>>>> is bad!
>>>>
>>>> As a guess - do you use arp monitoring for bonding? Try using miimon -
>>>> there were some issues with it in 3.10, which were fixed by some huge
>>>> patchsets that will never hit 3.10 stable.
>>>> Also, the bonding configuration would be welcome.
>>>
>>> Debian Bonding konfiguration looks like this:
>>> auto bond1
>>> iface bond1 inet manual
>>>          slaves eth2 eth3
>>>          bond-mode 802.3ad
>>>          bond_miimon 100
>>>          bond_updelay 200
>>>          bond_downdelay 0
>>>
>>> This should be miimon using lacp and not arp isn't it?
>>> Anything more needed?
>>>
>>
>> Hmm..  With 802.3ad mode, when the bond is a port on the bridge, the
>> bond should place all of its ports into promiscuous mode.  Do you see
>> the the kernel messages that say that?
>
>No it does not - i only see:
># dmesg -c|egrep "promiscuous|forward"
>[    5.445161] device bond0 entered promiscuous mode
>[    7.670701] device bond1 entered promiscuous mode
>[    7.845472] vmbr0: port 1(bond0) entered forwarding state
>[    7.845474] vmbr0: port 1(bond0) entered forwarding state
>[    8.269769] vmbr1: port 1(bond1) entered forwarding state
>[    8.269771] vmbr1: port 1(bond1) entered forwarding state
>
>Now adding variant 1:
># dmesg -c|egrep "promiscuous|forward"
>[   85.919382] device tap113i0 entered promiscuous mode
>[   85.965018] vmbr0: port 2(tap113i0) entered forwarding state
>[   85.965023] vmbr0: port 2(tap113i0) entered forwarding state
>[   86.263292] device tap113i1 entered promiscuous mode
>[   86.314151] device vmbr1.3000 entered promiscuous mode
>[   86.314153] device vmbr1 entered promiscuous mode
>[   86.314192] vmbr1v3000: port 1(vmbr1.3000) entered forwarding state
>[   86.314196] vmbr1v3000: port 1(vmbr1.3000) entered forwarding state
>[   86.318116] vmbr1v3000: port 2(tap113i1) entered forwarding state
>[   86.318120] vmbr1v3000: port 2(tap113i1) entered forwarding state
>[  101.382129] vmbr1v3000: port 1(vmbr1.3000) entered forwarding state
>
>Now it looks like this:
># ip a l|grep PROMISC
>13: tap113i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
>htb master vmbr0 state UNKNOWN qlen 500
>14: tap113i1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
>htb master vmbr1v3000 state UNKNOWN qlen 500

eth* should get into forwarding mode cause bond0 is a port of the bridge
and should propagate its state towards its slaves. Something is wrong here.

Maybe we're looking at the wrong direction - and the promisc for the
ethernet drivers got broken?

What ethernet cards/driver do you use for eth*?

>
>Greets,
>Stefan
>
>
>Main question is - is this one correct:

Both are correct. Here's my setup (sorry for stretching):

+---------------+           +------------+              +-------------+           +---------+           +------+
|     bond1     |           |            |              |   bridge0   |           |         |           |      |
|  192.168.2.1  |  master   | bridge0.15 |  neighbour   | 192.168.3.1 |  master   |  bond0  |  master   | eth2 |
|               | --------> |            | ------------ | 192.168.4.1 | --------> |         | --------> |      |
+---------------+           +------------+              +-------------+           +---------+           +------+
                                                                                     |
                                                                                     | master
                                                                                     v
+---------------+                                                                 +---------+
|    dummy0     |                                                                 |  eth0   |
+---------------+                                                                 +---------+

(disregard that dummy0).

All 192.168.X.1 ips are pingable (via the correct vlans) on both net-next and stable 3.10.19.

>>>>> eth2
>>>>>      \
>>>>>       -- bond1 -- vmbr1
>>>>>      /              \
>>>>> eth3                 \ vmbr1.3000
>>>>>                            \ ---- tap114i1
>
><= does not work at all
>
>or this one?:
>>>>> eth2
>>>>>      \
>>>>>       -- bond1 -- vmbr1
>>>>>      /     \
>>>>> eth3        ----- bond1.3000 --- vmbr1v3000
>>>>>                                      \ ---- tap114i1
>
><= works if i manually put eth2 and eth3 into promiscous mode.
>
>> -vlad
>>
>>> One thing i forgot the one with vmbr1.3000 does not work at all eben not
>>> with promisc mode. The one below works fine if i set eth2 and eth3 into
>>> promisc mode.
>>>
>>> Stefan
>>>
>>>>> I also tried this one without success:
>>>>> eth2
>>>>>      \
>>>>>       -- bond1 -- vmbr1
>>>>>      /     \
>>>>> eth3        ----- bond1.3000 --- vmbr1v3000
>>>>>                                      \ ---- tap114i1
>>>>>
>>>>>
>>>>>
>>>>> Greets,
>>>>> Stefan
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>>