Why Did I Lose DHCP Hostnames After Firmware Upgrade?
Zyxel_Kevin
Posts: 888 
Zyxel Employee
Zyxel Employee
Question: Why did I lose DHCP hostnames after upgrading my USG FLEX device to firmware version uOS 1.30?
Answer:
From firmware version uOS 1.30 onwards, DHCP hostnames must comply with RFC1123 rules, which require the following:
- Hostnames cannot start with a hyphen (-).
- They may only contain letters (A-Z, a-z), numbers (0-9), and hyphens (-).
- Maximum length is 255 characters.
If a previously entered hostname did not comply with these rules, it is possible that the system automatically converted it to a MAC address. This might be why the hostnames were lost or replaced during the firmware upgrade.
Tagged:
0
Categories
- All Categories
- 415 Beta Program
- 2.4K Nebula
- 146 Nebula Ideas
- 96 Nebula Status and Incidents
- 5.7K Security
- 262 USG FLEX H Series
- 271 Security Ideas
- 1.4K Switch
- 74 Switch Ideas
- 1.1K Wireless
- 40 Wireless Ideas
- 6.4K Consumer Product
- 249 Service & License
- 387 News and Release
- 84 Security Advisories
- 29 Education Center
- 10 [Campaign] Zyxel Network Detective
- 3.5K FAQ
- 34 Documents
- 34 Nebula Monthly Express
- 85 About Community
- 73 Security Highlight