Dell Unity：如何在 CIFS NAS 伺服器上停用 SMB2 通訊協定。

從 Unity OE 5.4 開始，導入了新參數 cifs.smb2.smb3only，以在 CIFS NAS 伺服器上啟用/停用 SMB2 通訊協定。

1. 設定 cifs.smb2.smb3only=0 （預設） 時，CIFS NAS 伺服器上會啟用 SMB2 通訊協定。SMB2 用戶端和 SMB3 用戶端可存取 CIFS NAS 伺服器。

root@vsa0 spa:/cores/service/user# svc_nas nas01 -param -f cifs -i smb2.smb3only -v

nas01 :
name                    = smb2.smb3only
facility_name           = cifs
default_value           = 0
current_value           = 0
configured_value        = 0
param_type              = NAS server
user_action             = none
change_effective        = immediate
range                   = (0,1)
description             = Specifies if SMB2 2XX dialects are disabled.

detailed_description
This parameter allows the disabling of SMB2 2XX dialects (SMB2.0/SMB2.0.2, SMB2.1 and SMB2.2). SMB2 is not disabled by default, as the default value is set to 0. Note: The SMB clients must disconnect all the SMB server shares in order to negotiate the appropriate dialect after modifying this parameter.

2. 若設定 cifs.smb2.smb3only=1 （預設），CIFS NAS 伺服器上的 SMB2 通訊協定會停用。CIFS NAS 伺服器只能由 SMB3 用戶端存取。

root@vsa0 spa:/cores/service/user# svc_nas nas01 -param -f cifs -i smb2.smb3only -v

nas01 :
name                    = smb2.smb3only
facility_name           = cifs
default_value           = 0
current_value           = 0
configured_value        = 0
param_type              = NAS server
user_action             = none
change_effective        = immediate
range                   = (0,1)
description             = Specifies if SMB2 2XX dialects are disabled.

detailed_description
This parameter allows the disabling of SMB2 2XX dialects (SMB2.0/SMB2.0.2, SMB2.1 and SMB2.2). SMB2 is not disabled by default, as the default value is set to 0. Note: The SMB clients must disconnect all the SMB server shares in order to negotiate the appropriate dialect after modifying this parameter.

3.如何修改 cifs.smb2.smb3only

root@vsa0 spa:/cores/service/user# svc_nas nas01 -param -f cifs -m smb2.smb3only -v 1

nas01 : done

注意：這是 NAS 伺服器級別的參數，一旦更改，將立即生效。