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Operating Systems Solaris Redundant IP interfaces for ISCSI boot? Post 302931082 by Peasant on Saturday 10th of January 2015 03:41:17 AM
Old 01-10-2015
Since Solaris supports iscsi multipath if you have two interfaces for ISCSI (say net0/net1), you can create two addresses (in same or different subnets), and present the iscsi lun for both those interfaces (initiators).

When you do that, the mpxio will notice that it is the same lun over two network paths and create one device with multipath active.

In case one interfaces (port on card) dies, it will transparently failover to the next.

For boot, you will have to define both paths in OBP as a boot device (one after another).
If boot works from both devices using boot command you have a go (and it should since it should see two targets before booting into OS).

Basically you will not be using ipmp but mpxio for iscsi failover.

I'm unable to find a specific 'howto' for this, but combining several documents looks like it can be done.
 

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vxbootsetup(1M) 														   vxbootsetup(1M)

NAME
vxbootsetup - set up system boot information on a Veritas Volume Manager disk SYNOPSIS
/etc/vx/bin/vxbootsetup [-g diskgroup] [medianame ... ] DESCRIPTION
The vxbootsetup utility configures physical disks so that they can be used to boot the system. Before vxbootsetup is called to configure a disk, the required volumes, standvol, rootvol and swapvol (and optionally, dumpvol) must be created on the disk. All of these volumes must be contiguous with only one subdisk. The -g option may be used to specify the boot disk group. If no medianame arguments are specified, all disks that contain usable mirrors of the root, swap, /usr and /var volumes are configured to be bootable. If medianame arguments are given, only the disks that are associated with the specified disk names are configured to be bootable. vxbootsetup requires that: o The root volume must be named rootvol and must have a usage type of root. o The swap volume must be named swapvol and must have a usage type of swap. o The volumes containing /usr and /var (if any) must be named usr and var, respectively. See the chapter "Recovery from Boot Disk Failure" in the Veritas Volume Manager Troubleshooting Guide for detailed information on how the system boots and how VxVM impacts the system boot process. The vxmirror, vxrootmir, and vxresize utilities call vxbootsetup automatically. If you use vxassist, or vxmake and vxplex to create mirrors of the root volume on a disk, you must run vxbootsetup explicitly to make the disk bootable. ARGUMENTS
medianame Specifies the disk name (disk media name) of a VM disk that is to be configured as bootable. SEE ALSO
disksetup(1M), edvtoc(1M), vxassist(1M), vxevac(1M), vxinstall(1M), vxintro(1M), vxmake(1M), vxmirror(1M), vxplex(1M), vxresize(1M), vxrootmir(1M) Veritas Volume Manager Troubleshooting Guide VxVM 5.0.31.1 24 Mar 2008 vxbootsetup(1M)
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