OPNsense Forum

English Forums => General Discussion => Topic started by: malakez on March 01, 2021, 05:15:41 PM

Title: unknown dhcp option value spam in general log
Post by: malakez on March 01, 2021, 05:15:41 PM
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?
Title: Re: unknown dhcp option value spam in general log
Post by: malakez on March 03, 2021, 06:32:11 AM
help?
Title: Re: unknown dhcp option value spam in general log
Post by: marjohn56 on March 03, 2021, 07:18:12 AM
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.
Title: Re: unknown dhcp option value spam in general log
Post by: malakez on March 05, 2021, 04:55:44 AM
Quote from: marjohn56 on March 03, 2021, 07:18:12 AM
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.