[pve-devel] new bridge code doesn't work with redhat kernel

[Alexandre DERUMIER]

Mmmm, this is strange, I have just retested after reboot my test server,

it doesn't work anymore too with new bridge code.

(maybe an arp problem ?)

I'm a bit scaried....


----- Mail original ----- 

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
Envoyé: Lundi 11 Février 2013 17:28:34 
Objet: Re: [pve-devel] new bridge code doesn't work with redhat kernel 

And how does you bridge look like? To me the tap devices attached to the bridge don't work at all. 

Stefan 

Am 11.02.2013 um 17:16 schrieb Alexandre DERUMIER <aderumier at odiso.com>: 

> Hi stefan, this is working for my with theses bond configs 
> 
> active-backup 
> -------------- 
> auto bond0 
> iface bond0 inet manual 
> slaves eth0 eth1 
> bond_miimon 100 
> bond_mode active-backup 
> pre-up ifup eth0 eth1 
> post-down ifdown eth0 eth1 
> 
> 
> or lacp 
> ------- 
> auto bond1 
> iface bond1 inet manual 
> bond-mode 4 
> bond-miimon 100 
> bond-lacp_rate fast 
> bond-xmit-hash-policy layer2+3 
> slaves eth0 eth1 
> 
> 
> ----- Mail original ----- 
> 
> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
> À: "Dietmar Maurer" <dietmar at proxmox.com> 
> Cc: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
> Envoyé: Lundi 11 Février 2013 16:40:13 
> Objet: Re: [pve-devel] new bridge code doesn't work with redhat kernel 
> 
> Hello, 
> 
> please wait a bit i'll contact Patrick in a few minutes as i wanted to 
> switch to bonding today and it stops working again. 
> 
> Let's see how a real solution would look like. Right now i've the same 
> problem as alexandre that the VM is not reachable at all when using bond. 
> 
> Alexandre maybe you can tell me how you got your bonding working? 
> 
> My interfaces: 
> 
> auto bond0 
> iface bond0 inet manual 
> slaves eth0 eth1 
> bond_mode 802.3ad 
> bond_miimon 100 
> bond_updelay 200 
> bond_downdelay 10 
> 
> auto vmbr0 
> iface vmbr0 inet manual 
> bridge_ports bond0 
> bridge_stp off 
> bridge_fd 0 
> 
> But this results in no IP communication for the VM - even without using 
> any vlans. 
> 
> Stefan 
> Am 11.02.2013 09:42, schrieb Dietmar Maurer: 
>> 
>> 
>>> -----Original Message----- 
>>> From: Alexandre DERUMIER [mailto:aderumier at odiso.com] 
>>> Sent: Freitag, 08. Februar 2013 08:12 
>>> To: Stefan Priebe; Dietmar Maurer 
>>> Cc: pve-devel at pve.proxmox.com 
>>> Subject: Re: [pve-devel] new bridge code doesn't work with redhat kernel 
>>> 
>>> Hi Stefan, Thanks it's working ! (I have not aware of vlan-raw-device syntax). 
>>> 
>>> Based of this, I have a better setup, putting ip addresse on vlan interface, 
>>> and not on a bridge. 
>>> So it's a small change. 
>>> 
>>> But I really think this change should not go in stable pve repo before a big 
>>> release like proxmox 2.3. 
>>> As It ll require reboot of the host to have clean bridges without mix of tagged 
>>> interfaces and tagged bridges interfaces. 
>> 
>> 2.3 release is the next release planned end of February. There is a new kernel, and 
>> a new kvm (1.4, including new backup code), so we need to recommend a reboot anyways. 
>> 
>> Here is a list of advantages and disadvantages: 
>> 
>> new code: 
>> 
>> + works with any number of physical interfaces 
>> + works with gvrp 
>> - only tested by a few people 
>> - not fully compatible with existing vlan setup 
>> 
>> old code: 
>> 
>> + works well for many users 
>> + also used by RHEV/libvirt 
>> - needs exactly one physical interface (should also work with 0 physical interfaces) 
>> - gvrp does not work (https://lkml.org/lkml/2013/2/7/107) 
>> + can use vlan hardware support (better performance?) 
>> 
>> 
>> Seems GVRP is a rarely used feature, because it is very dangerous security wise. 
>> 
>> So what is your opinion: 
>> 
>> A.) keep old VLAN code (revert change) 
>> B.) use new VLAN code 
>> 
>> Please can we vote on that? Also include a short explanation why you prefer something. 
>> 
>> - Dietmar 
>> 
>>