https://community.extremenetworks.com/t5/extremeswitching-other/where-to-find-mac-oui-listings-used-by-s4-s/m-p/11080#M2108 Syslog LLDP log messages state " unknown OUI's".&nbsp; Example :&nbsp; <SPAN>LLDP[1]LLDP unknown OUI 0x7f on port ge.1.28 received from MAC address aa-bb-cc-11-22-33".</SPAN> Is this generated by a lookup to a list of vendor OUI's or is it just the fact that something is wrong in the LLDP packet being sent by a particular vendor?<BR />&nbsp; I understand that the work around is to lower the severity for the LLDP logging application to level 1 , but I am curious as to the exact process in checking the OUI's in the switches.&nbsp; Is there a MIB that can be manipulated to include said vendors OUI.<BR /><BR />thnks in advance Mon, 13 Jun 2022 16:04:00 GMT Walt_Witkowski 2022-06-13T16:04:00Z https://community.extremenetworks.com/t5/extremeswitching-other/where-to-find-mac-oui-listings-used-by-s4-s/m-p/11080#M2108 Syslog LLDP log messages state " unknown OUI's".&nbsp; Example :&nbsp; <SPAN>LLDP[1]LLDP unknown OUI 0x7f on port ge.1.28 received from MAC address aa-bb-cc-11-22-33".</SPAN> Is this generated by a lookup to a list of vendor OUI's or is it just the fact that something is wrong in the LLDP packet being sent by a particular vendor?<BR />&nbsp; I understand that the work around is to lower the severity for the LLDP logging application to level 1 , but I am curious as to the exact process in checking the OUI's in the switches.&nbsp; Is there a MIB that can be manipulated to include said vendors OUI.<BR /><BR />thnks in advance Mon, 13 Jun 2022 16:04:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/where-to-find-mac-oui-listings-used-by-s4-s/m-p/11080#M2108 Walt_Witkowski 2022-06-13T16:04:00Z