OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Marc Tamsky - 27.10.2018

FS#1909 - failsafe packet sent to udp/4919 on WAN port does not match interface MAC after boot

- Device problem occurs on

Device tested: Archer C7 v2

- Software versions of OpenWrt/LEDE release, packages, etc.

Tested on Chaos Calmer 15.06, and on 18.06

- Steps to reproduce


packet sniff WAN port during power on
src MAC address of failsafe broadcast notification packet (sent to udp/4919) has a different MAC address than the final configured default MAC address for the WAN port after boot.

This causes issues with some ARRIS cable modem devices with a configured max client count of 1.

- Observed values

src MAC address of broadcast failsafe packet on the WAN port matches the LAN switch MAC.

- Suggested possible next actions:

1. Use the WAN switch MAC address for the broadcast packet, on all interfaces, which should be safe.
2. If 1. is infeasible, provide a /etc/config/... setting that disables the sending of the udp/4919 packet – which is not critical to experienced operators.


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