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Samba Multichannel support for AIX

  • 1.  Samba Multichannel support for AIX

    Posted 21 days ago

    I would like to ask if SMB Multichannel is officially supported on AIX with Samba.

    From what I can see:

    • Samba binaries appear to be compiled with multichannel support
    • configuration options related to multichannel are available
    • SMB dialect negotiation seems correct

    However, I cannot get SMB Multichannel to work correctly in practice.

    Environment:

    • AIX version: 7.2 TL5
    • Samba version: 4.21
    • Client OS: Windows 2019/AD
    • Network configuration: multiple NICs

    Current smb.conf relevant settings:

    server multi channel support = yes
aio read size = 1
aio write size = 1
interfaces = ...
bind interfaces only = yes

    What I observe:

    • client connects successfully
    • SMB3 is negotiated correctly
    • only a single TCP connection/channel is established
    • no additional channels are created

    Questions:

    1. Is SMB Multichannel officially supported on AIX builds of Samba?
    2. Are there any AIX-specific limitations or missing kernel/network capabilities?
    3. Is additional AIX network tuning required ?
    4. Has anyone successfully configured SMB Multichannel on AIX?


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    Sławomir Książek
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