Network Concept and Configuration for Scale-out and System Replication

[former_member182967]

Hello experts,

I get the following picture from white book SAP HANA Network Requirement.

I have some confuse which needs your confirmation:

Q1: For above HANA landscape, every host need at least three network cards as recommended, right? one for public, one for scale-out internal and one for system replication?

Q2: For system replication network, we do not need to add 10.5.x.x to /etc/hosts of these systems?

Q3: Virtual IP means public IP in this pic, right?

Thanks & Best Regards,

Tong Ning

[former_member182967]

Since now no expert reply this, can you give me some ideas?

Thanks & Best Regards,

Tong Ning

[lbreddemann]

Hey Tong Ning,

can you provide a link to the document you refer to? Without knowing it, I cannot say, what the book means...

Anyhow, here's my shot at your questions:

Q1: For above HANA landscape, every host need at least three network cards as recommended, right? one for public, one for scale-out internal and one for system replication?

A1: correct.

Q2: For system replication network, we do not need to add 10.5.x.x to /etc/hosts of these systems?

A2: You may as well add any other private network address range. Putting those into the hosts file is required for the name resolution.

Q3: Virtual IP means public IP in this pic, right?

A3: sorry - I don't see a virtual IP in the picture !?

- Lars

[former_member182967]

Hello Lars,

Thanks very much for your answer, it is just in time!

The link for SAP HANA - Network Requirement

About Q3, see the below pic from white book SAP HANA Network Requirement.

10.0.1.x is the virtual IP for IP redirection. (This picture from page 24 of the link, the very top picture is from page 30)

So in the original pic, the pubic IP means virtual IP, do you agree?

And about Q2, I add the entries in system_replication_hostname_resolution part of HANA parameters. Sure as your suggestion, I'd better to add the system replication IP in /etc/hosts

Best Regards,

Tong Ning