DGS-1248T Firmware Release Note  
Firmware: v3.11.01
Hardware: B1/B2
Date: January 8th, 2009

Problems Resolved:
1. Fix the bug that clients connected to switch will not obtain IP from DHCP server when switch configured to DHCP interface
2. Fix the bug that Management VLAN does not work if users create over 32 VLAN groups.
3. Fix the bug that device does not respond PING or Web after applying the VLAN configurations from a Linux station.
4. Fix the following bugs of 802.1X:
- Cannot block the port after authentication failure
- Unplug the authorized port, it will remain in “Authorized” status 

Enhancements:
NA
===============================================================
Firmware: v3.10.12
Hardware: B2/B1
Date: June 26th, 2008

Problems Resolved:
1. Fix the problem of DHCP option field parsing error

Enhancements:
1. Design in 2M top parameter boot flash and 4M top/bottom parameter boot flash for component availability. If the product was returned to RMA because of flash broken, please check the P/N of flash as below in order to upload corresponding boot code of flash. 
Flash Type
P/N of Flash
2M bottom parameter boot flash
2114528F160B19
2M top parameter boot flash
21145JS28F16000
4M bottom parameter boot flash
21145JS28F32000
4M top parameter boot flash
21145JS28F32001

Note: If the device is with new firmware v3.10.12, it is not allowed to downgrade previous firmware v3.00.xx.
================================================================
Firmware: v3.10.10
Hardware: B2/B1
Date: Mar. 3rd, 2008

Problems Resolved:
NA

Enhancements:
1. Feature enhancements are as follows:
- Trusted Host
- Cable Diagnostics
- Management VLAN
- Asymmetric VLAN
- DSCP QoS
- Power Saving

Note: The new firmware v3.10.10 is backward compatible with previous hardware version B1, but the power saving function is only applied for hardware version B2 (Green edition).

================================================================
Firmware: v3.00.11
Hardware: B1
Date: Dec. 10th, 2007

Problems Resolved:
1. Fix the bug that switch will not respond Ping or Web request if users enabled SNMP Trap settings after few hours of operation; meanwhile the packet transmit and receive function works normally.
2. Fix the issue when receiving lot of leave messages in IGMP snooping, the switch will not respond Ping or Web request after few hours of operation.
3. Fix the bug of invalid VLAN when setting over 64 groups
4. Fix the invalid IGMP parameter settings, especially for Query Interval, Max Response Time, Robustness Variable and Last Member Query Interval.

Enhancements:
NA
================================================================
Firmware: v3.00.07
Hardware: B1
Date: February 15, 2007

Problems Resolved:
No

Enhancements:
1. Enable the "Flow Control" option in GUI making it configurable to the user.

================================================================
Firmware: v3.00.06
Hardware: B1
Date: Sep. 14, 2006

Problems Resolved:
No

Enhancements:
1. Brand new black & silver outlook and new Web GUI
2. Hardware is compliant with RoHS
3. The maximum length of Jumbo Frame is up to 9220 Bytes
4. Support IGMP snooping
5. Support 802.1x Port-based Access Control
6. Support Broadcast Storm Control
7. Support Static Mac
8. Support Safeguard Engine 
9. Support DHCP client for both Web GUI and SmartConsole Utility
10. Can reboot switch via Web GUI
11. Support firmware Backup and Upload via Web GUI

Note: 
1. The firmware v3.00.06 is not backward compatible with previous hardware v.Ax.

=================================================================
Firmware: v2.01.03
Hardware: A2/A1
Date: May 24, 2006

Problems Resolved:
No

Enhancements:
1. Hardware is compliant with RoHS.
2. Software features are unchanged.

Note: 
1. New firmware is backward compatible with previous hardware.
2. If users upgrade New firmware to device, the device cannot be downgraded to old firmware
===============================================================
Firmware: v2.00.15
Hardware: A1
Date: August 29, 2005

Problems Resolved:
No

Enhancements:
1. Support SNMP v1(Private MIB,RFC1213) 
2. Support 802.1D Spanning Tree
3. Migrate Port-based QoS to 802.1P QoS
4. Support Jumbo Frame (Maximum length is 9000 bytes)
=================================================================
Firmware: v1.00.00
Hardware: A1
Date: Oct. 20, 2004

Problems Resolved:
1.First release

Enhancements:
No