[ovirt-users] Suggestion for configuration with only 2 nics and equallogic ISCSI

[Phil Meyer]

On 03/15/2017 04:24 AM, Gianluca Cecchi wrote:
> ...
> that I can't do because the storage target is EQL and they don't
> support bonding way to connect
...

There is more than one way to do bonded interfaces.
You must be doing something other than LACP.

Using LACP, (mode=4) the bonded interfaces have only one MAC address.
In other modes, each interface retains it MAC address.
This may be what is confusing the storage array(s).  When packets are sent
to another device with multiple MAC addresses, the response MUST return
to the interface that it was sent from.

This is handled in tcp/ip settings for the kernel, in Linux.
You may want to check these sysctl values:

net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.all.rp_filter = 2

The rp_filter values and meaning were redefined in newer kernels,
so you may have to research a bit.

Good luck.