dnsmasq: causing Mikrotik routers to hang at BOOTP message
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Description
Maintainer: OpenWrt team
Environment: x86 64
tested on VM
OpenWrt 22.03.0 r19685-512e76967f
&
OpenWrt 22.03.3, r20028-43d71ad93e
Description:
When booting Mikrotik devices (Hap lites tested) behind this build they hang at the boot loader until a time out of roughly 5 or 6 minutes then boots successfully. No other devices tested so far have this issue but none of them have a bootloader that checks for BOOTP on every boot.
Things to reproduce on a fresh install is create a static DHCP lease for the Mikrotik in /etc/config/dhcp or via Luci reload and reboot the Mikrotik.
Creating a dummy vlan interface on the LAN bridge makes this issue dissappear
https://forum.openwrt.org/t/bootp-disable-or-block-22-03/144719/7
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the boot delay on a fresh OpenWrt x86 VM with a static lease in /etc/config/dhcp and a Mikrotik Hap lite, then compare behavior with and without a dummy VLAN on the LAN bridge. Review the linked forum discussion and determine what change would prevent the BOOTP-related hang while preserving normal DHCP behavior.
Written by the indexing model from the issue text.
Assessment
- Domain
- networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100