Major Description
There is no support for detecting Netgear devices, I only got two the same here, which solely identifies themselves in the sysdecr as "GS108Tv2".
There is also:
$ snmpwalk -v2c -c public hostname |grep -i netgear
iso.3.6.1.2.1.1.9.1.3.3 = STRING: "NETGEAR Reference"
iso.3.6.1.2.1.1.9.1.3.20 = STRING: "NETGEAR Switching - Layer 2"
iso.3.6.1.2.1.1.9.1.3.24 = STRING: "NETGEAR Radius MIB"
iso.3.6.1.2.1.1.9.1.3.27 = STRING: "The NETGEAR Private MIB for Mgmt Security"
iso.3.6.1.2.1.1.9.1.3.28 = STRING: "NETGEAR Flex QOS Support"
iso.3.6.1.2.1.1.9.1.3.29 = STRING: "NETGEAR Flex QOS ACL"
iso.3.6.1.2.1.1.9.1.3.30 = STRING: "NETGEAR Flex QOS COS"
iso.3.6.1.2.1.1.9.1.3.33 = STRING: "NETGEAR Flex QOS DiffServ Private MIBs' definitions"
iso.3.6.1.2.1.1.9.1.3.34 = STRING: "NETGEAR Flex QOS DiffServ Private MIBs' definitions"
which might make this detection much better, or at least will allow other netgear models to be detected.
/opt/observium/includes/definitions/os.inc.php
$os = "netgear";
$config['os'][$os]['text'] = "Netgear Ethernet Switch";
$config['os'][$os]['type'] = "network";
$config['os'][$os]['icon'] = "netgear";
/opt/observium/includes/discovery/os/netgear.inc.php
<?php
if (!$os)
{
if (preg_match("/^GS108Tv2/", $sysDescr))Unknown macro: { $os = "netgear"; }}
?>