Error · dhclient · unknown dhcp option value 0x5a

[ferdinandpc]

Hi, I've been getting this error message for a while now: Error · dhclient · unknown dhcp option value 0x5a. It appears during the renewal:

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2026-07-06T13:36:44      Notice    dhclient dhclient-script: Creating resolv.conf
2026-07-06T13:36:44      Notice    dhclient dhclient-script: Reason RENEW on igc0_vlan832 executing
2026-07-06T13:36:44      Error     dhclient unknown dhcp option value 0x5aMy ISP is Orange Spain with VLAN configured and DHCP for the WAN. Any ideas on how to fix this?
I found some information suggesting to add option option-90 code 90 = string; to the config file, but I get this error:

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2026-07-06T13:52:20 · Error · dhclient · ^
2026-07-06T13:52:20 · Error · dhclient · option
2026-07-06T13:52:20 · Error · dhclient · /var/etc/dhclient.igc0_vlan832.conf line 10: expecting a statement.The error is on the line where I added the option.