[cifs-protocol] [REG:115041612643080 ] MS-ADTS 6.2 - Knowledge consistency checker

[Edgar Olougouna]

[case number in subject]
[bcc dochelp; cc casemail]

Hello Garming,
Glad to hear from you. The case number 115041612643080 has been created for this inquiry. I will investigate and assist you on this.

Thanks,
Edgar

-----Original Message-----
From: Garming Sam [mailto:garming at catalyst.net.nz] 
Sent: Wednesday, April 15, 2015 11:25 PM
To: Interoperability Documentation Help
Cc: cifs-protocol at samba.org
Subject: MS-ADTS 6.2 - Knowledge consistency checker

Hi,

In attempting to implement the inter-site topology generation algorithm, it appears that cases around RODC are lacking clarity in the documentation.

For instance described in 6.2.2.3.3 - Site Graph Concepts, essentially Red describes sites with writable replicas, Black describes sites with only partial read-only and White with neither writable nor partial read-only replicas. But there is no mention of full read-only replicas.

The only assumption that could be made here is that they are white, however, there are two problems:

1. In 6.2.2.3.4.3 - Site Graph Construction under ColorVertices, Red describes sites with one or more DCs with full replicas - not writable. 
This would make full read-only replica Red.

2. Being marked as White, during intersite topology generation, sites with only an RODC do not appear in the spanning-tree computation. 
Therefore, they will never create any connections.

Being marked as Red however, there does not appear to be any restrictions in the graph construction on who may replicate from it (like a Black node for instance). Is there something here I am misunderstanding?

What color is a site containing only an RODC intended to be? And are there any additional undocumented special cases for RODC?


Cheers,

Garming Sam