Ticket #2786 there is an issue with convert_real_interface_to_friendly_interface which might return not expected data as in the situation checked for vlan case her ein the validation. Avoid for this case here the issue to allow properly setting mtu on vlans with not assigned parent.
Related issues
Bug #2786: Setting MTU on VLAN does not set MTU on parent interface in 2.2
Added by Ermal Luçi over 10 years ago
Ticket #2786 there is an issue with convert_real_interface_to_friendly_interface which might return not expected data as in the situation checked for vlan case her ein the validation. Avoid for this case here the issue to allow properly setting mtu on vlans with not assigned parent.