[FS#3744] static IPv6 routes to gateways within the ULA address range are not restored on startup
openwrt-bugs at lists.openwrt.org
Sat Apr 17 15:19:22 BST 2021
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User who did this - Erik Tews (eriktews)
Attached to Project - OpenWrt/LEDE Project
Summary - static IPv6 routes to gateways within the ULA address range are not restored on startup
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To -
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Static IPv6 routes configured in `/etc/config/network` that use a gateway within the ula address range are not properly restored on startup.
I managed to reproduce the issue in 19.07.7 and in the latest snapshot (17-04-2021). To reproduce the issue, do the following:
Setup a new OpenWRT system, for example in a VM. Uplink connectivity is not required, which makes it easy to reproduce the bug in a VM. Then edit `/etc/config/network` and add an IPv6 route using a gateway within the ula range. For example the entries may look like this:
config globals 'globals'
option ula_prefix 'fd22:e91a:3889::/48'
option target "2001:4860:4860::8844"
option gateway "fd22:e91a:3889::43"
option interface "lan"
Reboot the device and verify that the route is not present with `ip -6 route show`. Then modify the config a bit, for example replace the _43_ in the gateway address with _42_. Then execute `reload_config` and wait a few seconds. Then verify that the route is present with `ip -6 route show`. You may then reboot the device and the route will not be there anymore.
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