OPNsense Forum

Archive => 22.7 Legacy Series => Topic started by: Dorsal4831 on November 25, 2022, 08:28:19 am

Title: Working IPv6 with consistent radvd warnings [sendmsg: Network is down]
Post by: Dorsal4831 on November 25, 2022, 08:28:19 am

I am on this version of OPNsense:

Versions   OPNsense 22.7.8-amd64
FreeBSD 13.1-RELEASE-p3
OpenSSL 1.1.1s 1 Nov 2022

I have IPv6 through ISP natively (Verizon Fios) with the following settings:

FIREWALL: SETTINGS: ADVANCED
Allow IPv6 [checked]

INTERFACES: [WAN]

Generic configuration:
IPv6 Configuration Type [DHCPv6]

DHCPv6 client configuration:
Request only an IPv6 prefix [check]
Prefix delegation size [56]
Send IPv6 prefix hint [check]
Use IPv4 connectivity [unchecked]
Use VLAN priority [disabled]

INTERFACES: [LAN]

Generic configuration
IPv6 Configuration Type [Track Interface]

Track IPv6 Interface
Track IPv6 Interface [WAN]
IPv6 Prefix ID [ 0 ]
Manual configuration [unchecked]

I can see the firewall rules automatically added for IPv6 RFC4890 requirements (ICMP) in FIREWALL: RULES: FLOATING and
allow dhcpv6 client in WAN in FIREWALL: RULES: WAN

The warnings are as follows in SYSTEM: ROUTES: LOG FILE

2022-11-25T02:17:47-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T02:13:09-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T02:11:47-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T02:06:14-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T02:02:04-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T01:59:45-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T01:57:01-05:00   Warning   radvd   sendmsg: Network is down   
2022-11-25T01:53:26-05:00   Warning   radvd   sendmsg: Network is down

Despite all of the warnings, I am receiving an IPv6 IP on LAN and all VLAN interfaces, which I also have set to track with different Prefix ID's

I can also ping on all interfaces using IPv6 and Traceroute to IPv6 sites on all interfaces.

I tried to continue a similar thread but it appeared locked and it was unsolved as of this post.

I am not too concerned with the warnings since otherwise everything is working, just curious about them more so.

Thanks,

Title: Re: Working IPv6 with consistent radvd warnings [sendmsg: Network is down]
Post by: Dorsal4831 on December 04, 2022, 11:20:25 pm

I am certain I have figured this out.

So just in case anyone else comes across this warning, it means there is an interface that is pulling a delegated IPv6 address to a physical port (LAN, OPT1, etc.) but there is no link or cable plugged in.

The fix, obviously, would be to plug in your device or deactivate the interface. Otherwise the warnings will persist.