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

Hi Dan I should have mentioned that we need to use the same subnet for both iSCSI interfaces which is why I ended up bonding (mode 1) these.

Looking at https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtuali..., it doesn't say anything about tying the iSCSI Bond back to the host. In our DEV environment I removed the bond the iSCSI interfaces were using and created the iSCSI Bond as per this link. What do I do now? Recreate the bond and give it an IP? I don't see where to put an IP for iSCSI against the hosts?

Lastly, not using jumbo frames as where a critical infrastructure organisation and I fear possible side effects.

Thanks On Sat, Jun 25, 2016 at 10:30 AM, Dan Yasny <dyasny(a)gmail.com&gt; wrote: > Two things off the top of my head after skimming the given details: > 1. iSCSI will work better without the bond. It already uses multipath, so > all you need is to separate the portal IPs/subnets and provide separate > IPs/subnets to the iSCSI dedicated NICs, as is the recommended way here: > https://access.redhat.com/solutions/131153 and also be sure to follow > this: > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtuali... > 2. You haven't mentioned anything about jumbo frames, are you using > those? If not, it is a very good idea to start. > > And 3: since this is RHEV, you might get much more help from the official > support than from this list. > > Hope this helps > Dan > > On Fri, Jun 24, 2016 at 9:12 PM, Colin Coe <colin.coe(a)gmail.com&gt; 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 >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> >> >