Author Topic: 24.7.7 - Not responding to IPv6 Neighbor Advertisments (Read 102 times)

techyporcupine · « **on:** November 20, 2024, 03:16:42 pm »

Hello! I just recently set up HE's Tunnel Broker for IPv6 on my OPNsense install, and have it working for the most part, except devices only get IPv6 addresses after being connected for a couple of minutes, and I can see devices sending Neighbor Advertisements with TCPdump, but the router doesn't respond, and the devices only get V6 IP's after an unsolicited advertisement.

A screenshot of the RA page is attached.

meyergru · « **Reply #1 on:** **Today** at 12:27:29 am »

Is this on a VM by any chance? There is a known IPv6 multicast problem in Linux networking (see here).

techyporcupine · « **Reply #2 on:** **Today** at 01:09:30 am »

This is actually on a VM running on Proxmox. I was about to update this post, but I switched from using PCI passthrough for the NICs to a Bridge in Proxmox and now the issue seems resolved?!

meyergru · « **Reply #3 on:** **Today** at 10:03:20 am »

I would use vtnet, because it is faster than the emulation these days and also would disable multicast snooping for good measure. In my experiments, it always worked for a few minutes and then failed.

Author Topic: 24.7.7 - Not responding to IPv6 Neighbor Advertisments (Read 102 times)

techyporcupine

24.7.7 - Not responding to IPv6 Neighbor Advertisments

meyergru

Re: 24.7.7 - Not responding to IPv6 Neighbor Advertisments

techyporcupine

Re: 24.7.7 - Not responding to IPv6 Neighbor Advertisments

meyergru

Re: 24.7.7 - Not responding to IPv6 Neighbor Advertisments