OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Medium
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Scoopta - 21.04.2020

FS#3028 - Unable to setup multiple WAN interfaces using DHCPv6-PD

- Device problem occurs on - amd64 build on a pcengines apu4
- OpenWRT version - 19.07.2

Quick overview, about a year ago I posted this https://forum.openwrt.org/t/multiple-dhcpv6-wan-interfaces-connection-loss/42056 which gives a detailed overview of what was attempted.

Setting up an alias WAN interface to get multiple /64 prefixes causes them to drop their prefixes ever hour. Setting up multiple WAN interfaces on the same physical interface causes the older one to drop its prefix after an hour while the other works fine.

Steps to reproduce:
Create an alias interface and have it ask for a second prefix from an upstream router

Scoopta commented on 28.04.2020 02:52

Using a macvlan for the second WAN interface so that each WAN has its own dedicated Linux interface with its own mac address seems to make everything work. I'm not sure if this is a bug or intended. Maybe running 2 DHCPv6-PD clients on one interface isn't supported.

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