SNMPD : no ifindex found for interface

Hi,
I recently added some IPFO even though I'm not sure it comes from there, my logs are full of this:

Code:

May 16 10:40:41 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:41 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:41 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:41 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:41 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:41 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:41 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:42 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:42 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:42 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:42 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:42 ns123 snmpd[1153]: ioctl 35123 returned -1
May 16 10:40:42 ns123 snmpd[1153]: no ifindex found for interface
May 16 10:40:42 ns123 snmpd[1153]: ioctl 35123 returned -1

My interfaces look like this:

Code:

cat /etc/systemd/network/50-default.network

[...]

[Address]
Address=xx.xx.xx.xx/32
Label=xx

[Address]
Address=xx.xx.xx.xx/32
Label=xx2

[Address]
Address=xx.xx.xx.xx/32
Label=xx3

[Address]
Address=xx.xx.xx.xx/32
Label=xx4

I've looked on internet but couldn't find anything related to this issue.
I found the .c file there and checked the function: https://github.com/RMerl/asuswrt-me...mibgroup/ip-mib/data_access/ipaddress_ioctl.c
Got also this:

Code:

oid
netsnmp_access_interface_ioctl_ifindex_get(int fd, const char *name)
{
#ifndef SIOCGIFINDEX
    return 0;
#else
    struct ifreq    ifrq;
    int rc = 0;

    DEBUGMSGTL(("access:interface:ioctl", "ifindex_get\n"));

    rc = _ioctl_get(fd, SIOCGIFINDEX, &ifrq, name);
    if (rc < 0) {
        DEBUGMSGTL(("access:interface:ioctl",
                   "ifindex_get error on inerface '%s'\n", name));
        return 0;
    }

    return ifrq.ifr_ifindex;
#endif /* SIOCGIFINDEX */
}

Can you help ?