Dell Unity：如何在 CIFS NAS 服务器上禁用 SMB2 协议。

在 Unity OE 5.4 中，引入了一个新参数 cifs.smb2.smb3only，用于在 CIFS NAS 服务器上启用/禁用 SMB2 协议。

1. 当设置 cifs.smb2.smb3only=0（默认值）时，在 CIFS NAS 服务器上启用 SMB2 协议。SMB2 客户端和 SMB3 客户端可以访问 CIFS NAS 服务器。

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. 设置 cifs.smb2.smb3only=1（默认值）时，在 CIFS NAS 服务器上禁用 SMB2 协议。CIFS NAS 服务器只能由 SMB3 客户端访问。

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

提醒：这是NAS服务器级别参数，一旦更改，将立即生效。