DGS-1224T Firmware Release Notes

Firmware: v4.21.01
Hardware: A1
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 



Note: 
This firmware v4.21.01 is for v4.20.xx/v4.10.xx upgrading only. If the device is with firmware v4.00.xx, please follow up the “New Firmware Upgrade Procedure “sheet to upgrade the firmware from v4.00.xx to v4.21.01. If the device is with new firmware v4.21.01, it is not allowed to downgrade previous firmware v4.20.xx/v4.10.xx.

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Firmware: v4.20.T13
Hardware: D1,D2

Problems Resolved:
1. Fix STP Edge port issue when Trunk enabled

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Firmware: v4.10.02
Hardware: D1
Date: Sept. 28, 2006

Problems Resolved:
1. Fixed SNMP and STP both enabled system LED problem.

Note: 
1. Firmware v4.10.02 is not backward compatible with previous hardware revisions B1/C1.
2. Please follow the file sequence in the "READ ME" files. 

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Firmware: v4.00.12
Hardware: D1
Date: May. 24, 2006

Problems Resolved:
No

Enhancements:
1. New black & silver housing and new Web GUI
2. Hardware is compliant with RoHS
3. Reduce the quantity of fan from two to one.
4. The maximum length of Jumbo Frame is up to 10240 Bytes
5. Support IGMP snooping
6. Support 802.1x Port-based Access Control
7. Support Broadcast Storm Control
8. Support Static Mac
9. Support Safeguard Engine 
10. Support DHCP client for both Web GUI and SmartConsole Utility
11. Can reboot switch via Web GUI
12. Support firmware Backup and Upoad via Web GUI
13. When enabling flow control, there will be a pop up window warning “the QoS may not be able to perform accurate bandwidth allocation”.

Note: 
Firmware v4.00.12 is not backward compatible with previous hardware v.B1/C1.

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Firmware: v3.00.17
Hardware: C1
Date: August. 29, 2005

Enhancements:
1. Migrate Port-based QoS to 802.1Q QoS 
2. Migrate Port-based VLAN to 802.1Q Tag-VLAN 
3. Support SNMP v1 (Private MIB, RFC1213)
4. Support Jumbo Frame (Maximum length is 9000bytes)
5. Support 802.1D Spanning Tree function

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Firmware: v2.00.06
Hardware: C1
Date: Sep. 29, 2004

Enhancements:
1. Add "Clear Counters" Button for "Statistics" page.

Firmware: v2.00.05
Hardware: C1
Date: Aug. 27, 2004

1. First release version.