BPF_FIB_LOOKUP_DIRECT bypasses all ip rule statements and looks directly at the routing table of the interface (if interface is part of a VRF the VRF routing table is used). For some reason not using LOOKUP_DIRECT on 22.04 with hwe Kernel causes Linux to look into the default routing table, causing packet loops and forwarding errors. We can safely switch to LOOKUP_DIRECT because we don't care about routing rules and just want a lookup in the associated VRF.
BPF_FIB_LOOKUP_DIRECT bypasses all
ip rulestatements and looks directly at the routing table of the interface (if interface is part of a VRF the VRF routing table is used). For some reason not using LOOKUP_DIRECT on 22.04 with hwe Kernel causes Linux to look into the default routing table, causing packet loops and forwarding errors. We can safely switch to LOOKUP_DIRECT because we don't care about routing rules and just want a lookup in the associated VRF.based on https://github.com/telekom/das-schiff-network-operator/pull/75, should be merged first