[ovirt-users] oVirt/RHEV and HP Blades and HP iSCSI SAN

[Colin Coe]

Hi Fernando

The network is pretty much cast in stone now.  I even if I could change it,
I'd be relucant todo so as the firewall/router has 1Gb interfaces but the
iSCSI SANs and blade servers are all 10Gb.  Having these in different
subnets will create a 1Gb bottle neck.

Thanks


On Sat, Jun 25, 2016 at 12:45 PM, Fernando Frediani <
fernando.frediani at upx.com.br> wrote:

> Hello Colin,
>
> I know well all the equipment you have in your hands as I used to work
> with these during a long time. Great stuff I can say.
>
> All seems Ok from what you describe, except the iSCSI network which should
> not be a bond, but two independent vlans (and subnets) using iSCSI
> multipath. Bond works, but it's not the recommended setup for these
> scenarios.
>
> Fernando
> On 24/06/2016 22:12, Colin Coe wrote:
>
> Hi all
>
> We run four RHEV datacenters, two PROD, one DEV and one TEST/Training.
> They are all  working OK but I'd like a definitive answer on how I should
> be configuring the networking side as I'm pretty sure we're getting
> sub-optimal networking performance.
>
> All datacenters are housed in HP C7000 Blade enclosures.  The PROD
> datacenters use HP 4730 iSCSI SAN clusters, each datacenter has a cluster
> of two 4730s. These are configured RAID5 internally with NRAID1. The DEV
> and TEST datacenters are using P4500 iSCSI SANs and each datacenter has a
> cluster of three P4500s configured with RAID10 internally and NRAID5.
>
> The HP C7000 each have two Flex10/10D interconnect modules configured in a
> redundant ring so that we can upgrade the interconnects without dropping
> network connectivity to the infrastructure. We use fat RHEL-H 7.2
> hypervisors (HP BL460) and these are all configured with six network
> interfaces:
> - eno1 and eno2 are bond0 which is the rhevm interface
> - eno3 and eno4 are bond1 and all the VM VLANs are trunked over this bond
> using 802.1q
> - eno5 and eno6 are bond2 and dedicated to iSCSI traffic
>
> Is this the "correct" way to do this?  If not, what should I be doing
> instead?
>
> Thanks
>
> CC
>
>
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