ISCSI and multipath

[Andrew Snow]

Sossi Andrej wrote:
> Another question about MD3000i.
> My MD3000i have 2 controller and every controller have 2 net interface.
> My FreeBSD server is connect on NAS server with 2 network cards throw 
> out 2 switch on th 2 networks. (192.168.253.X and 192.168.252.X).
> In the official manual is written if the primary controller (or net) 
> have a problem the NAS automatically switch disks drive on second 
> controller. For this is required MPIO on Windows or MPP on Linux. It is 
> supported also on FreeBSD?

If you only wanted to do failover at the network level with shared IP 
address, you could use lagg.

However, since you have different IP subnets for each network, you 
probably want to look at using geom_fox.  You set up two iSCSI 
connections, one to each controller, and geom_fox on top to make it 
appear as a single disk device.


Hope that helps!


- Andrew