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

[Fernando Frediani]

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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