Re: [ovirt-users] iSCSI VLAN host connections - bond or multipath & IPv6

On 28/09/17 08:32, Yaniv Kaul wrote: > > > On Wed, Sep 27, 2017 at 10:59 PM, Ben Bradley <listsbb(a)virtx.net > <mailto:listsbb@virtx.net>> wrote: > > Hi All > > I'm looking to add a new host to my oVirt lab installation. > I'm going to share out some LVs from a separate box over iSCSI and > will hook the new host up to that. > I have 2 NICs on the storage host and 2 NICs on the new Ovirt host > to dedicate to the iSCSI traffic. > I also have 2 separate switches so I'm looking for redundancy here. > Both iSCSI host and oVirt host plugged into both switches. > > If this was non-iSCSI traffic and without oVirt I would create > bonded interfaces in active-backup mode and layer the VLANs on top > of that. > > But for iSCSI traffic without oVirt involved I wouldn't bother with > a bond and just use multipath. > > From scanning the oVirt docs it looks like there is an option to > have oVirt configure iSCSI multipathing. > > > Look for iSCSI bonding - that's the feature you are looking for. Thanks for the replies. By iSCSI bonding, do you mean the oVirt feature "iSCSI multipathing" as mentioned here https://www.ovirt.org/documentation/admin-guide/chap-Storage/ ? Separate links seems to be the consensus then. Since these are links dedicated to iSCSI traffic, not shared. the ovirtmgmt bridge lives on top of an active-backup bond on other NICs. Thanks, Ben

> So what's the best/most-supported option for oVirt? > Manually create active-backup bonds so oVirt just sees a single > storage link between host and storage? > Or leave them as separate interfaces on each side and use oVirt's > multipath/bonding? > > Also I quite like the idea of using IPv6 for the iSCSI VLAN, purely > down to the fact I could use link-local addressing and not have to > worry about setting up static IPv4 addresses or DHCP. Is IPv6 iSCSI > supported by oVirt? > > > No, we do not. There has been some work in the area[1], but I'm not > sure it is complete. > Y. > > [1] > https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+branch:master+top... > > > > Thanks, Ben > _______________________________________________ > Users mailing list > Users(a)ovirt.org <mailto:Users@ovirt.org> > http://lists.ovirt.org/mailman/listinfo/users > <http://lists.ovirt.org/mailman/listinfo/users> > > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users