Re: [ovirt-users] 答复: bonding 802.3ad mode
On Wed, Mar 18, 2015 at 10:57:18PM -0400, Dan Yasny wrote:
Mode 0 is not supported under a bridge, just like mode 6
On Wed, Mar 18, 2015 at 10:47 PM, Xie, Chao <xiec.fnst(a)cn.fujitsu.com>
wrote:
> Yeah, Alex is right. And if you want to double the network’s speed in
> single flow, the mode 0 is only choice. But mode 0 seems not be supported
> in oVirt?
>
>
>
> *发件人:* users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] *代表 *Alex
> Crow
> *发送时间:* 2015年3月19日 0:25
> *收件人:* users(a)ovirt.org
> *主题:* Re: [ovirt-users] bonding 802.3ad mode
>
>
>
> The balancing on 802.3ad only occurs for different network flows based on
> a hash of source and destination MAC (or can be made to add IP addresses
> into the calculation). A single flow will only use a single NIC in ad mode.
>
> Alex
>
>
> On 18/03/15 16:17, Nathanaël Blanchet wrote:
>
> Hi all,
>
> I'm used to create a mode 4 bond0 interface with two 1 Gb/s interfaces on
> all my hosts, and ethtool bond0 gives me a functionnal 2000Mb/s. However,
> when importing a vm from the export domain (NFS with a speed of 4GB/s), I
> always have this alert:
>
> "Host siple has network interface which exceeded the defined threshold
> [95%] (em3: transmit rate[0%], receive rate [100%])"
> It seems that the second nic never works while the first one is overloaded.
> Is it an expected behaviour? I believed that the flow was balanced between
> the two interfaces in 802.3ad mode.
To follow up on former ressponses: what do you have on top of your bond?
If you have a VM network, multiple guests are expected to have a
different hash value for each, and to spread the load on mode 4.
If you use the bonds for a host network (e.g. dispaly, migration,
storage) you can try mode 0.