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Question and Answer

Connor McDonald

Thanks for the question.

Asked: July 10, 2020 - 4:05 am UTC

Answered by: Connor McDonald - Last updated: July 14, 2020 - 3:46 am UTC

Category: Database Administration - Version: 12.2.0.1

Viewed 100+ times

You Asked

Hi Tom,

Is it ok to use Fiber and Ethernet for cluster_interconnect type mixed?
Ex.
ib0 192.168.3.0 global cluster_interconnect,asm ==> InfiniBand Fiber Interface
eno4 192.168.5.0 global cluster_interconnect,asm ==> Fast Ethernet Interface

Any potential risk on that kind of configuration.
Thank you.

Davis

and we said...

You probably *could* but I probably *wouldnt* :-)

The interconnect is critical to cluster operation and hence sensitive to having the configuration correct.

A quick look at MOS shows examples like:

Doc ID 1394936.1 - problems when MTU is different
Doc ID 1296579.1 - problems when subnet config is incorrect

For any RAC system, my policy is KIS (Keep It Simple) and as close to defaults as possible, because then if you ever have a problem, Support will be better equipped to help you.

Along the same lines, any time you are departing from standard, it is always worth a check with Support first to get their blessing

and you rated our response

  (1 rating)

Reviews

July 13, 2020 - 7:18 am UTC

Reviewer: Davis

Thank you,Connor.
Since the IB switch is still on the way, so I made a cross-over way between the 2-node. According to the book, it's not recommended, right?
Any situations would happen in that way?

Thank you.
Connor McDonald

Followup  

July 14, 2020 - 3:46 am UTC

Crossover for playing/exploring etc is fine.

Crossover for production is a definite no.