unknown dhcp option value spam in general log

[malakez]

Hello,

My infrastructure is

Zyxel VDSL-router in bridge mode -> Shuttle ds77u (opnsense) -> unifi 8port 60W switch -> Unifi nano HD connected directly to 8 port switch & Unifi Flex mini 4port switch connected directly to 8 pot switch for my PC.

I'm using many VLANs. DHCP is off in unifi 8port switch. For every 10 minutes inn Opnsense general logs I see

2021-03-01T17:54:24   dhclient[53615]   bound to MyWANIPaddress -- renewal in 600 seconds.   
2021-03-01T17:54:24   dhclient[64424]   Creating resolv.conf   
2021-03-01T17:54:24   dhclient[53615]   unknown dhcp option value 0xd4   
2021-03-01T17:54:24   dhclient[53615]   unknown dhcp option value 0x7d

I wonder what this is and how to stop it?

[malakez]

help?

[marjohn56]

d4 is an undefined option and 7d is 'Vendor Identifying Vendor Specific or as Huawei puts it 'Vendor-identifying vendor-specific information option, used only by a DHCP server to send enterprise number information to a client.' dhclient doesn't use them but flags them in the logs, you can safely ignore the entries.

[malakez]

d4 is an undefined option and 7d is 'Vendor Identifying Vendor Specific or as Huawei puts it 'Vendor-identifying vendor-specific information option, used only by a DHCP server to send enterprise number information to a client.' dhclient doesn't use them but flags them in the logs, you can safely ignore the entries.

Thanks for the information good sir.