LibreNMS does not appear to support IPv6 (at all ?)

[Archebald]

Alright - so is there a way to successfully add a device into LibreNMS to support IPv6 ?

My host records are all dual stack - so resolve both an A and a AAAA record for IPv4 and IPv6 name resolution initially.

I attempted to add a device using the IPv6 literal. This did not seem to work.

I see IPv6 pings go out, but no IPv6 SNMP polls ever are issued.

I attempted to add a device using a hostname (which I had seen others indicate they had success with.). So initially my hostname would resolve both an A and a AAAA record. The A record did not (by design) respond as our management network is 100% only IPv6. Never issued any IPv6 ICMP queries.

I then deleted the A record so only a AAAA record was present. This had the exact same result as when I added the host record. ICMPv6 pings were issued but never a one SNMP poll went out.

As an aside - both ping and SNMPwalk from the command line work as expected so I can communicate to the device using the typical Ubuntu toolset.

Anyone have any different experience ? Or perhaps any suggestion as to how I could get LibreNMS to work with IPv6 ? Oh - and its running on Ubuntu 22 natively (no docker container).

Thanks!

[Archebald]

Actually - so I found a bit of a work around… seems to be a small bug though. So if I remove UDP4 under Global Settings / Poller / SNMP / Transport (priority) and add it back as the lowest priority it starts using SNMPoUDPv6. Before that it doesn’t appear to use SNMPoUDPv6 even when given an IPv6 literal or a hostname that only resolves to a AAAA (IPv6) address.

[murrant]

Yes, at this time LibreNMS snmp uses explicitly what IP family you set for the device.