Cannot add IPV6 only host: "Could not connect"

Help
1

Hello,

Component Version
LibreNMS 5ce9b6b2e82e09925f1fd9722d1f1c247acfad0a
DB Schema 184
PHP 7.0.15-0ubuntu0.16.04.4
MySQL 10.0.29-MariaDB-0ubuntu0.16.04.1
RRDTool 1.5.5
SNMP NET-SNMP 5.7.3

[OK] Database connection successful
[OK] Database schema correct

I added udp6 to /etc/snmp/snmpd.conf for enabling IPv6:

# Change RANDOMSTRINGGOESHERE to your preferred SNMP community string
agentaddress udp:161
agentaddress udp6:161

com2sec readonly  default       COMMUNITY
com2sec6 readonly  default      COMMUNITY

group MyROGroup v2c        readonly
view all    included  .1                               80
access MyROGroup ""      any       noauth    exact  all    none   none

syslocation Station Berlin
syscontact Your Name <[email protected]>

#Distro Detection
extend .1.3.6.1.4.1.2021.7890.1 distro /usr/bin/distro

removing agentaddress udp:161 doesn’t help.

the DNS record is as follows: AAAA 2017:f11:z:123::1

snmpwalk -v 2c -c COMMUNITY fqdn.example.net works:

“iso.3.6.1.2.1.1.1.0 = STRING: “Linux test 4.8.0-46-generic #49~16.04.1-Ubuntu SMP Fri Mar 31 >14:51:03 UTC 2017 x86_64”
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.8072.3.2.10
iso.3.6.1.2.1.1.3.0 = Timeticks: (45812431) 5 days, 7:15:24.31”
[…]

snmpwalk -v 2c -c COMMUNITY 2017:f11:z:123::1 works to:

iso.3.6.1.2.1.1.1.0 = STRING: “Linux test 4.8.0-46-generic #49~16.04.1-Ubuntu SMP Fri Mar 31 >14:51:03 UTC 2017 x86_64”
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.8072.3.2.10
iso.3.6.1.2.1.1.3.0 = Timeticks: (45824807) 5 days, 7:17:28.07
[…]

sudo su - librenms -c '/opt/librenms/addhost.php fqdn.example.net COMMUNITY v2c' results in:

Could not connect, please check the snmp details and snmp reachability
SNMP v2c: No reply with community COMMUNITY

sudo su - librenms -c '/opt/librenms/addhost.php 2017:f11:z:123::1 COMMUNITY v2c'

Could not connect, please check the snmp details and snmp reachability
SNMP v2c: No reply with community COMMUNITY

any hints? thanks a lot!

2

You need to specify it as udp6 which you can do on the cli if you pass all the other params or just add it via the webui which is probably easier:

./addhost.php 2017:f11:z:123::1 COMMUNITY v2c 161 udp6