[cifs-protocol] [EXTERNAL] MS-SMB2 NETWORK_INTERFACE_INFO Response for ROCEv1 and Infiniband - TrackingID#2504290040010105

[Sreekanth Nadendla]

Hello Metze,

Pure Adapter implementations without ip/tcp stack, cannot have an ip address assigned. However, the hybrid ones that are capable of handling ip MUST have an ip address configured for SMBD. It is only these adapters that are supported for RDMA and so, having an ip address assigned is a requirement for RDMA deployment.


InfiniBand adapters with IPoIB will use ip address to bind/establish only the connection with their peers,  however they use the fast path for RDMA transfers. Let us know if you have any follow up questions.



Regards,

Sreekanth Nadendla

Microsoft Windows Open Specifications

________________________________
From: Michael Bowen <Mike.Bowen at microsoft.com>
Sent: Tuesday, April 29, 2025 12:59 PM
To: Stefan Metzmacher (Samba) <metze at samba.org>
Cc: cifs-protocol at lists.samba.org <cifs-protocol at lists.samba.org>; tom <tom at talpey.com>; Microsoft Support <supportmail at microsoft.com>
Subject: RE: [EXTERNAL] MS-SMB2 NETWORK_INTERFACE_INFO Response for ROCEv1 and Infiniband - TrackingID#2504290040010105

[DocHelp to bcc]

Hi Metze,

Thanks for your question about MS-SMB2. I've created case number 2504290040010105 to track this issue. One of our engineers will contact you soon.

Best regards,
Michael Bowen
Microsoft Open Specifications

-----Original Message-----
From: Stefan Metzmacher <metze at samba.org>
Sent: Tuesday, April 29, 2025 9:38 AM
To: Interoperability Documentation Help <dochelp at microsoft.com>
Cc: cifs-protocol at lists.samba.org; tom <tom at talpey.com>
Subject: [EXTERNAL] MS-SMB2 NETWORK_INTERFACE_INFO Response for ROCEv1 and Infiniband

Hi DocHelp,

following the discussion at SambaXP I'm wondering how
SMB3 over SMB-Direct over ROCEv1 or Infiniband can work...

MS-SMB2 2.2.32.5 NETWORK_INTERFACE_INFO Response only specifies IPv4 or IPV6 as possible address families.
But only ROCEv2 (on ip/udp) and iWarp (on ip/tcp) work over ip networks.

Can you please clarify this as various discussions and older SDC talks talk about Infiniband being supported for SMB-Direct and SMB.

Thanks!
metze
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