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OCI 7.1.1 cDOT SVM relationship to hosts

Hello together,

 

Today we saw a lot of servers, which were marked as "blocked host" which means that they are zoned but have not mapped any storage.

When we investigated this, we saw that the servers have mapped storage. The cause is, that OCI mapps the server to the partner site in the MCC and not to the running instance of the SVM.

 

Is this a known issue?

 

Regs

Matthias

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hey Matthias,

 

What protocol are these hosts using to access the MCC? I am not aware of any particular issue here.

 

Matt

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hi Matt,

 

We are using FCP.

The LIFs on both sites have the same WWPNs but the LIFs on the standby site are down. OCI seems to use the standby site for checking SAN paths.

 

Regs

Matthias

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hi Matthias,

 

Do the LIFS have different WWNNs? OCI uses the node WWN for a fair amount of its logic, so that might be what's behind this one.

 

-Bryan

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hello Brian,

 

No, because of the MCC, the LIFs of the standby SVM has the same WWPNs as the original one. The LIFs of the standby SVM are offline and will be onlined with a metrocluster switchover only.

 

Regs

Matthias

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hey Matthias, We are going to look at MCC aka cDOT MetroCluster WWNN / WWPN issues as a bug. We are currently working out some raw capacity double counting issues in MCC, and once that is solved we will address this issue Matt

Re: OCI 7.1.1 cDOT SVM relationship to hosts

Hi Matthias,

 

We now have a patch that should allow OCI to better understand this topology.

 

Regards,

Bryan