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[Bug] - Repeated ndisc_router_discovery failed messages in the journal when using systemd-networkd

Open derlopes-amzn opened this issue 2 months ago • 1 comments

Describe the bug I am seeing the exact same issues as described in https://github.com/bottlerocket-os/bottlerocket/issues/3411

We are using EKS 1.32 with AL2023 node version 1.32.3-20250627. This is not present on our AL2 nodegroups.

To Reproduce Steps to reproduce the behavior:

  1. Deploy nodegroup with eks.NodegroupAmiType.AL2023_X86_64_STANDARD AMI
  2. SSM into a host
  3. Run dmesg -w
  4. Observe ICMPv6: RA: ndisc_router_discovery failed to add default route errors

Expected behavior No errors related to ndisc_router_discovery failed

Additional context

The suggested workarounds listed in https://github.com/bottlerocket-os/bottlerocket/issues/3411 also work for this error. echo 0 | sudo tee /proc/sys/net/ipv6/conf/ens5/accept_ra or echo 1 | sudo tee /proc/sys/net/ipv6/conf/ens5/accept_ra stops the errors entirely.

derlopes-amzn avatar Nov 10 '25 23:11 derlopes-amzn

Hi @derlopes-amzn, we are taking a look and will get back to you on this

xcawolfe-amzn avatar Nov 12 '25 18:11 xcawolfe-amzn

Hey @xcawolfe-amzn, any update on this?

derlopes-amzn avatar Dec 15 '25 23:12 derlopes-amzn