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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