White Papers

6 Improved security of iDRAC9 with Lifecycle Controller via SMB2 Protocol
2 Advantages of SMB2 over CIFS/SMB1
SMB2 protocol provides better security and durability. Following are advantages of SMB2 over CIFS and a
summary of the changes in each version of SMB.
SMB version
Change history
SMB 1.0
Initial release of SMB.
SMB 2.0
First major redesign of SMB
• Increased file sharing scalability
• Improved performance
- Request compounding
- Asynchronous operations
- Larger reads/writes
• More secure and robust
- Small command set
- Signing now uses HMAC SHA-256 instead of MD5
- SMB2 durability
SMB 2.1
• File leasing improvements
• Large MTU support
• BranchCache
SMB 3.0
• Availability
- SMB Transparent Failover
- SMB Witness
- SMB Multichannel
• Performance
- SMB Scale-Out
- SMB Direct (SMB 3.0 over RDMA)
- SMB Multichannel
- Directory Leasing
- BranchCache V2
• Backup
- VSS for Remote File Shares
• Security
- SMB Encryption using AES-CCM (Optional)
- Signing now uses AES-CMAC
• Management
- SMB PowerShell
- Improved performance counters
- Improved Eventing
SMB 3.02
• Automatic rebalancing of Scale-Out File Server clients
• Improved performance of SMB Direct (SMB over RDMA)
• Support for multiple SMB instances on a Scale-Out File Server.